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Diffstat (limited to 'make/autoconf/otp.m4')
| -rw-r--r-- | make/autoconf/otp.m4 | 3310 |
1 files changed, 3310 insertions, 0 deletions
diff --git a/make/autoconf/otp.m4 b/make/autoconf/otp.m4 new file mode 100644 index 0000000000..98b8ea5f61 --- /dev/null +++ b/make/autoconf/otp.m4 @@ -0,0 +1,3310 @@ +dnl -*-Autoconf-*- +dnl %CopyrightBegin% +dnl +dnl Copyright Ericsson AB 1998-2023. All Rights Reserved. +dnl +dnl Licensed under the Apache License, Version 2.0 (the "License"); +dnl you may not use this file except in compliance with the License. +dnl You may obtain a copy of the License at +dnl +dnl http://www.apache.org/licenses/LICENSE-2.0 +dnl +dnl Unless required by applicable law or agreed to in writing, software +dnl distributed under the License is distributed on an "AS IS" BASIS, +dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +dnl See the License for the specific language governing permissions and +dnl limitations under the License. +dnl +dnl %CopyrightEnd% +dnl + +dnl +dnl otp.m4 +dnl +dnl Local macros that can be used in `configure.ac` files in OTP. To use +dnl any of the macros your `configure.ac` file should include this file +dnl using `m4_include([otp.m4])` after AC_INIT. +dnl +dnl The Local Macros which could be part of autoconf are prefixed LM_, +dnl macros specific dnl to the Erlang system are prefixed ERL_ (this is +dnl not always consistently made...). +dnl + +AC_DEFUN([ERL_CANONICAL_SYSTEM_TYPE], +[ + AC_CANONICAL_HOST + # Adjust for local legacy windows hack... + AS_CASE([$host], + [local-*-windows], + [ + host=win32 + host_os=win32 + host_vendor= + host_cpu= + ]) + + AC_CANONICAL_BUILD + # Adjust for local legacy windows hack... + AS_CASE([$build], + [local-*-windows], + [ + build=win32 + build_os=win32 + build_vendor= + build_cpu= + ]) + + AC_CANONICAL_TARGET + # Adjust for local legacy windows hack... + AS_CASE([$target], + [local-*-windows], + [ + target=win32 + target_os=win32 + target_vendor= + target_cpu= + ]) + + AS_IF([test "$cross_compiling" = "yes" -a "$build" = "$host"], + [AC_MSG_ERROR([ + Cross compiling with the same canonicalized 'host' value + as the canonicalized 'build' value. + + We are cross compiling since the '--host=$host_alias' + and the '--build=$build_alias' arguments differ. When + cross compiling Erlang/OTP, also the canonicalized values of + the '--build' and the '--host' arguments *must* differ. The + canonicalized values of these arguments however both equals: + $host + + You can check the canonical value by passing a value as + argument to the 'make/autoconf/config.sub' script. + ])]) +]) + +AC_DEFUN(LM_PRECIOUS_VARS, +[ + +dnl ERL_TOP +AC_ARG_VAR(ERL_TOP, [Erlang/OTP top source directory]) + +dnl Tools +AC_ARG_VAR(CC, [C compiler]) +AC_ARG_VAR(CFLAGS, [C compiler flags]) +AC_ARG_VAR(STATIC_CFLAGS, [C compiler static flags]) +AC_ARG_VAR(CFLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag passed via C compiler]) +AC_ARG_VAR(CPP, [C/C++ preprocessor]) +AC_ARG_VAR(CPPFLAGS, [C/C++ preprocessor flags]) +AC_ARG_VAR(CXX, [C++ compiler]) +AC_ARG_VAR(CXXFLAGS, [C++ compiler flags]) +AC_ARG_VAR(LD, [linker (is often overridden by configure)]) +AC_ARG_VAR(LDFLAGS, [linker flags (can be risky to set since LD may be overridden by configure)]) +AC_ARG_VAR(LIBS, [libraries]) +AC_ARG_VAR(DED_LD, [linker for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) +AC_ARG_VAR(DED_LDFLAGS, [linker flags for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) +AC_ARG_VAR(DED_LD_FLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) +AC_ARG_VAR(LFS_CFLAGS, [large file support C compiler flags (set all LFS_* variables or none)]) +AC_ARG_VAR(LFS_LDFLAGS, [large file support linker flags (set all LFS_* variables or none)]) +AC_ARG_VAR(LFS_LIBS, [large file support libraries (set all LFS_* variables or none)]) +AC_ARG_VAR(RANLIB, [ranlib]) +AC_ARG_VAR(AR, [ar]) +AC_ARG_VAR(GETCONF, [getconf]) + +dnl Cross system root +AC_ARG_VAR(erl_xcomp_sysroot, [Absolute cross system root path (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only used when cross compiling)]) + +dnl Cross compilation variables +AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_linux_usable_sigaltstack, [have working sigaltstack(): yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_poll, [have working poll(): yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_kqueue, [have working kqueue(): yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_putenv_copy, [putenv() stores key-value copy: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_reliable_fpe, [have reliable floating point exceptions: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_getaddrinfo, [have working getaddrinfo() for both IPv4 and IPv6: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_gethrvtime_procfs_ioctl, [have working gethrvtime() which can be used with procfs ioctl(): yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_clock_gettime_cpu_time, [clock_gettime() can be used for retrieving process CPU time: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_after_morecore_hook, [__after_morecore_hook can track malloc()s core memory usage: yes|no (only used when cross compiling)]) +AC_ARG_VAR(erl_xcomp_dlsym_brk_wrappers, [dlsym(RTLD_NEXT, _) brk wrappers can track malloc()s core memory usage: yes|no (only used when cross compiling)]) + +]) + +AC_DEFUN(ERL_XCOMP_SYSROOT_INIT, +[ +erl_xcomp_without_sysroot=no +if test "$cross_compiling" = "yes"; then + test "$erl_xcomp_sysroot" != "" || erl_xcomp_without_sysroot=yes + test "$erl_xcomp_isysroot" != "" || erl_xcomp_isysroot="$erl_xcomp_sysroot" +else + erl_xcomp_sysroot= + erl_xcomp_isysroot= +fi +]) + +AC_DEFUN(LM_CHECK_GETCONF, +[ +AS_IF( + [test "$cross_compiling" != "yes"], + [ + AC_CHECK_PROG([GETCONF], [getconf], [getconf], [false]) + ], + [ + dnl First check if we got a `<HOST>-getconf' in $PATH + host_getconf="$host_alias-getconf" + AC_CHECK_PROG([GETCONF], [$host_getconf], [$host_getconf], [false]) + AS_IF( + [test "$GETCONF" = "false" && test "$erl_xcomp_sysroot" != ""], + [ + dnl We should perhaps give up if we haven't found it by now, but at + dnl least in one Tilera MDE `getconf' under sysroot is a bourne + dnl shell script which we can use. We try to find `<HOST>-getconf' + dnl or `getconf' under sysconf, but only under sysconf since + dnl `getconf' in $PATH is almost guaranteed to be for the build + dnl machine. + GETCONF= + prfx="$erl_xcomp_sysroot" + AC_PATH_TOOL([GETCONF], [getconf], [false], + ["$prfx/usr/bin:$prfx/bin:$prfx/usr/local/bin"]) + ]) + ]) +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_WINDOWS_ENVIRONMENT +dnl +dnl +dnl Tries to determine the windows build environment, i.e. +dnl MIXED_VC or MIXED_MINGW +dnl + +AC_DEFUN(LM_WINDOWS_ENVIRONMENT, +[ + +if test "X$windows_environment_" != "Xchecked"; then +windows_environment_=checked +MIXED_CYGWIN=no +MIXED_MSYS=no +MIXED_VSL=no + +dnl MIXED_VC is Microsoft Visual C++ used as standard compiler +MIXED_VC=no +dnl MIXED_MINGW is mingw(32|64) used as standard compiler +MIXED_MINGW=no + +AC_MSG_CHECKING(for mixed mingw-gcc and native VC++ environment) +if test "X$host" = "Xwin32" -a "x$GCC" != "xyes"; then + if test -x /usr/bin/msys-?.0.dll; then + CFLAGS="$CFLAGS -O2" + MIXED_MSYS=yes + AC_MSG_RESULT([MSYS and VC]) + MIXED_VC=yes + CPPFLAGS="$CPPFLAGS -DERTS_MIXED_VC" + elif test -x /usr/bin/cygpath; then + CFLAGS="$CFLAGS -O2" + MIXED_CYGWIN=yes + AC_MSG_RESULT([Cygwin and VC]) + MIXED_VC=yes + CPPFLAGS="$CPPFLAGS -DERTS_MIXED_VC" + elif test -x /bin/wslpath; then + CFLAGS="$CFLAGS -O2" + MIXED_WSL=yes + AC_MSG_RESULT([WSL and VC]) + MIXED_VC=yes + CPPFLAGS="$CPPFLAGS -DERTS_MIXED_VC" + else + AC_MSG_RESULT([undeterminable]) + AC_MSG_ERROR(Seems to be mixed windows but not within any known env, cannot handle this!) + fi +else + AC_MSG_RESULT([no]) +fi + +AC_SUBST(MIXED_VC) + +if test "x$MIXED_MSYS" != "xyes"; then + AC_MSG_CHECKING(for mixed cygwin and native MinGW environment) + if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then + if test -x /usr/bin/cygpath; then + CFLAGS="$CFLAGS -O2" + AC_MSG_RESULT([yes]) + MIXED_MINGW=yes + CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MINGW" + else + AC_MSG_RESULT([undeterminable]) + AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!) + fi + else + AC_MSG_RESULT([no]) + fi +else + AC_MSG_CHECKING(for mixed MSYS and native MinGW environment) + if test "x$GCC" = x"yes"; then + if test -x /usr/bin/msys-=.0.dll; then + CFLAGS="$CFLAGS -O2" + AC_MSG_RESULT([yes]) + MIXED_MINGW=yes + CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MINGW" + else + AC_MSG_RESULT([undeterminable]) + AC_MSG_ERROR(Seems to be mixed windows but not with msys, cannot handle this!) + fi + else + AC_MSG_RESULT([no]) + fi +fi +AC_SUBST(MIXED_MINGW) + +AC_MSG_CHECKING(if we mix cygwin with any native compiler) +if test "X$MIXED_CYGWIN" = "Xyes"; then + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi + +AC_MSG_CHECKING(if we mix msys with another native compiler) +if test "X$MIXED_MSYS" = "Xyes" ; then + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi + +AC_MSG_CHECKING(if we mix WSL with another native compiler) +if test "X$MIXED_WSL" = "Xyes" ; then + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi + +fi +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_FIND_EMU_CC +dnl +dnl +dnl Tries fairly hard to find a C compiler that can handle jump tables. +dnl Defines the @EMU_CC@ variable for the makefiles and +dnl inserts NO_JUMP_TABLE in the header if one cannot be found... +dnl + +AC_DEFUN(LM_FIND_EMU_CC, + [AC_CACHE_CHECK(for a compiler that handles jumptables, + ac_cv_prog_emu_cc, + [ +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +#if defined(__clang_major__) && __clang_major__ >= 3 + /* clang 3.x or later is fine */ +#elif defined(__llvm__) +#error "this version of llvm is unable to correctly compile beam_emu.c" +#endif + __label__ lbl1; + __label__ lbl2; + extern int magic(void); + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; +lbl1: + return 1; +lbl2: + return 2; +]])],[ac_cv_prog_emu_cc="$CC"],[ac_cv_prog_emu_cc=no]) + +if test "$ac_cv_prog_emu_cc" = no; then + for ac_progname in emu_cc.sh gcc-4.2 gcc; do + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f "$ac_dir/$ac_progname"; then + ac_cv_prog_emu_cc="$ac_dir/$ac_progname" + break + fi + done + IFS="$ac_save_ifs" + if test "$ac_cv_prog_emu_cc" != no; then + break + fi + done +fi + +AS_IF([test "$ac_cv_prog_emu_cc" != no], + [ + save_CC="$CC" + save_CFLAGS=$CFLAGS + save_CPPFLAGS=$CPPFLAGS + CC="$ac_cv_prog_emu_cc" + CFLAGS="" + CPPFLAGS="" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +#if defined(__clang_major__) && __clang_major__ >= 3 + /* clang 3.x or later is fine */ +#elif defined(__llvm__) +#error "this version of llvm is unable to correctly compile beam_emu.c" +#endif + __label__ lbl1; + __label__ lbl2; + extern int magic(void); + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; + lbl1: + return 1; + lbl2: + return 2; + ]])],[ac_cv_prog_emu_cc="$CC"],[ac_cv_prog_emu_cc=no]) + CC=$save_CC + CFLAGS=$save_CFLAGS + CPPFLAGS=$save_CPPFLAGS + ]) +]) +if test "$ac_cv_prog_emu_cc" = no; then + AC_DEFINE(NO_JUMP_TABLE,[],[Defined if no found C compiler can handle jump tables]) + EMU_CC="$CC" +else + EMU_CC="$ac_cv_prog_emu_cc" +fi +AC_SUBST(EMU_CC) +]) + + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_PROG_INSTALL_DIR +dnl +dnl This macro may be used by any OTP application. +dnl +dnl Figure out how to create directories with parents. +dnl (In my opinion INSTALL_DIR is a bad name, MKSUBDIRS or something is better) +dnl +dnl We prefer 'install -d', but use 'mkdir -p' if it exists. +dnl If none of these methods works, we give up. +dnl + + +AC_DEFUN(LM_PROG_INSTALL_DIR, +[AC_CACHE_CHECK(how to create a directory including parents, +ac_cv_prog_mkdir_p, +[ +temp_name_base=config.$$ +temp_name=$temp_name_base/x/y/z +$INSTALL -d $temp_name >/dev/null 2>&1 +ac_cv_prog_mkdir_p=none +if test -d $temp_name; then + ac_cv_prog_mkdir_p="$INSTALL -d" +else + mkdir -p $temp_name >/dev/null 2>&1 + if test -d $temp_name; then + ac_cv_prog_mkdir_p="mkdir -p" + fi +fi +rm -fr $temp_name_base +]) + +case "${ac_cv_prog_mkdir_p}" in + none) AC_MSG_ERROR(don't know how create directories with parents) ;; + *) INSTALL_DIR="$ac_cv_prog_mkdir_p" AC_SUBST(INSTALL_DIR) ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_PROG_PERL5 +dnl +dnl Try to find perl version 5. If found set PERL to the absolute path +dnl of the program, if not found set PERL to false. +dnl +AC_DEFUN(LM_PROG_PERL5, +[AC_PATH_PROGS(PERL, perl5 perl, false, + /usr/local/bin:/opt/local/bin:/usr/local/gnu/bin:${PATH}) +if test "$PERL" = "false"; then + ac_cv_path_PERL=false + PERL=false +dnl AC_MSG_WARN(perl version 5 not found) +fi +])dnl + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_SO_BSDCOMPAT +dnl +dnl Check if the system has the SO_BSDCOMPAT flag on sockets (linux) +dnl +AC_DEFUN(LM_DECL_SO_BSDCOMPAT, +[AC_CACHE_CHECK([for SO_BSDCOMPAT declaration], ac_cv_decl_so_bsdcompat, +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[int i = SO_BSDCOMPAT;]])],[ac_cv_decl_so_bsdcompat=yes],[ac_cv_decl_so_bsdcompat=no])) + +case "${ac_cv_decl_so_bsdcompat}" in + "yes" ) AC_DEFINE(HAVE_SO_BSDCOMPAT,[], + [Define if you have SO_BSDCOMPAT flag on sockets]) ;; + * ) ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_INADDR_LOOPBACK +dnl +dnl Try to find declaration of INADDR_LOOPBACK, if nowhere provide a default +dnl + +AC_DEFUN(LM_DECL_INADDR_LOOPBACK, +[AC_CACHE_CHECK([for INADDR_LOOPBACK in netinet/in.h], + ac_cv_decl_inaddr_loopback, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> +#include <netinet/in.h>]], [[int i = INADDR_LOOPBACK;]])],[ac_cv_decl_inaddr_loopback=yes],[ac_cv_decl_inaddr_loopback=no]) +]) + +AS_IF( + [test ${ac_cv_decl_inaddr_loopback} = no], + [ + AC_CACHE_CHECK([for INADDR_LOOPBACK in rpc/types.h], + ac_cv_decl_inaddr_loopback_rpc, + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <rpc/types.h>]], [[int i = INADDR_LOOPBACK;]])],[ac_cv_decl_inaddr_loopback_rpc=yes],[ac_cv_decl_inaddr_loopback_rpc=no])) + + AS_IF( + [test "${ac_cv_decl_inaddr_loopback_rpc}" = "yes"], + [ + AC_DEFINE(DEF_INADDR_LOOPBACK_IN_RPC_TYPES_H,[], + [Define if you need to include rpc/types.h to get INADDR_LOOPBACK defined]) + ], + [ + AC_CACHE_CHECK([for INADDR_LOOPBACK in winsock2.h], + ac_cv_decl_inaddr_loopback_winsock2, + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#define WIN32_LEAN_AND_MEAN + #include <winsock2.h>]], [[int i = INADDR_LOOPBACK;]])],[ac_cv_decl_inaddr_loopback_winsock2=yes],[ac_cv_decl_inaddr_loopback_winsock2=no])) + case "${ac_cv_decl_inaddr_loopback_winsock2}" in + "yes" ) + AC_DEFINE(DEF_INADDR_LOOPBACK_IN_WINSOCK2_H,[], + [Define if you need to include winsock2.h to get INADDR_LOOPBACK defined]) ;; + * ) + # couldn't find it anywhere + AC_DEFINE(HAVE_NO_INADDR_LOOPBACK,[], + [Define if you don't have a definition of INADDR_LOOPBACK]) ;; + esac + ]) + ]) +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_STRUCT_SOCKADDR_SA_LEN +dnl +dnl Check if the sockaddr structure has the field sa_len +dnl + +AC_DEFUN(LM_STRUCT_SOCKADDR_SA_LEN, +[AC_CACHE_CHECK([whether struct sockaddr has sa_len field], + ac_cv_struct_sockaddr_sa_len, +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> +#include <sys/socket.h>]], [[struct sockaddr s; s.sa_len = 10;]])],[ac_cv_struct_sockaddr_sa_len=yes],[ac_cv_struct_sockaddr_sa_len=no])) + +dnl FIXME convbreak +case ${ac_cv_struct_sockaddr_sa_len} in + "no" ) AC_DEFINE(NO_SA_LEN,[1],[Define if you dont have salen]) ;; + *) ;; +esac +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_SYS_IPV6 +dnl +dnl Check for ipv6 support and what the in6_addr structure is called. +dnl (early linux used in_addr6 instead of in6_addr) +dnl + +AC_DEFUN(LM_SYS_IPV6, +[AC_MSG_CHECKING(for IP version 6 support) +AC_CACHE_VAL(ac_cv_sys_ipv6_support, +[ok_so_far=yes + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> +#ifdef __WIN32__ +#include <winsock2.h> +#include <ws2tcpip.h> +#else +#include <netinet/in.h> +#endif]], [[struct in6_addr a6; struct sockaddr_in6 s6;]])],[ok_so_far=yes],[ok_so_far=no]) + +AS_IF( + [test $ok_so_far = yes], + [ + ac_cv_sys_ipv6_support=yes + ], + [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> +#ifdef __WIN32__ +#include <winsock2.h> +#include <ws2tcpip.h> +#else +#include <netinet/in.h> +#endif]], [[struct in_addr6 a6; struct sockaddr_in6 s6;]])],[ac_cv_sys_ipv6_support=in_addr6],[ac_cv_sys_ipv6_support=no]) + ]) +])dnl + +dnl +dnl Have to use old style AC_DEFINE due to BC with old autoconf. +dnl + +case ${ac_cv_sys_ipv6_support} in + yes) + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) + ;; + in_addr6) + AC_MSG_RESULT([yes (but I am redefining in_addr6 to in6_addr)]) + AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) + AC_DEFINE(HAVE_IN_ADDR6_STRUCT,[],[Early linux used in_addr6 instead of in6_addr, define if you have this]) + ;; + *) + AC_MSG_RESULT(no) + ;; +esac +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_SYS_MULTICAST +dnl +dnl Check for multicast support. Only checks for multicast options in +dnl setsockopt(), no check is performed that multicasting actually works. +dnl If options are found defines HAVE_MULTICAST_SUPPORT +dnl + +AC_DEFUN(LM_SYS_MULTICAST, +[AC_CACHE_CHECK([for multicast support], ac_cv_sys_multicast_support, +[ +AC_EGREP_CPP(^yes$, +[#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#if defined(IP_MULTICAST_TTL) && defined(IP_MULTICAST_LOOP) && defined(IP_MULTICAST_IF) && defined(IP_ADD_MEMBERSHIP) && defined(IP_DROP_MEMBERSHIP) +yes +#endif +], ac_cv_sys_multicast_support=yes, ac_cv_sys_multicast_support=no)]) +if test $ac_cv_sys_multicast_support = yes; then + AC_DEFINE(HAVE_MULTICAST_SUPPORT,[1], + [Define if setsockopt() accepts multicast options]) +fi +])dnl + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_DECL_SYS_ERRLIST +dnl +dnl Define SYS_ERRLIST_DECLARED if the variable sys_errlist is declared +dnl in a system header file, stdio.h or errno.h. +dnl + +AC_DEFUN(LM_DECL_SYS_ERRLIST, +[AC_CACHE_CHECK([for sys_errlist declaration in stdio.h or errno.h], + ac_cv_decl_sys_errlist, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> +#include <errno.h>]], [[char *msg = *(sys_errlist + 1);]])],[ac_cv_decl_sys_errlist=yes],[ac_cv_decl_sys_errlist=no])]) +if test $ac_cv_decl_sys_errlist = yes; then + AC_DEFINE(SYS_ERRLIST_DECLARED,[], + [define if the variable sys_errlist is declared in a system header file]) +fi +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_CHECK_FUNC_DECL( funname, declaration [, extra includes +dnl [, action-if-found [, action-if-not-found]]] ) +dnl +dnl Checks if the declaration "declaration" of "funname" conflicts +dnl with the header files idea of how the function should be +dnl declared. It is useful on systems which lack prototypes and you +dnl need to provide your own (e.g. when you want to take the address +dnl of a function). The 4'th argument is expanded if conflicting, +dnl the 5'th argument otherwise +dnl +dnl + +AC_DEFUN(LM_CHECK_FUNC_DECL, +[AC_MSG_CHECKING([for conflicting declaration of $1]) +AC_CACHE_VAL(ac_cv_func_decl_$1, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h> +$3]], [[$2 +char *c = (char *)$1; +]])],[eval "ac_cv_func_decl_$1=no"],[eval "ac_cv_func_decl_$1=yes"])]) +if eval "test \"`echo '$ac_cv_func_decl_'$1`\" = yes"; then + AC_MSG_RESULT(yes) + ifelse([$4], , :, [$4]) +else + AC_MSG_RESULT(no) +ifelse([$5], , , [$5 +])dnl +fi +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl AC_DOUBLE_MIDDLE_ENDIAN +dnl +dnl Checks whether doubles are represented in "middle-endian" format. +dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly, +dnl as well as DOUBLE_MIDDLE_ENDIAN. +dnl +dnl + +AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN], +[AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian, +[# It does not; compile a test program. +AC_RUN_IFELSE( +[AC_LANG_SOURCE([[#include <stdlib.h> + +int +main(void) +{ + int i = 0; + int zero = 0; + int bigendian; + int zero_index = 0; + + union + { + long int l; + char c[sizeof (long int)]; + } u; + + /* we'll use the one with 32-bit words */ + union + { + double d; + unsigned int c[2]; + } vint; + + union + { + double d; + unsigned long c[2]; + } vlong; + + union + { + double d; + unsigned short c[2]; + } vshort; + + + /* Are we little or big endian? From Harbison&Steele. */ + u.l = 1; + bigendian = (u.c[sizeof (long int) - 1] == 1); + + zero_index = bigendian ? 1 : 0; + + vint.d = 1.0; + vlong.d = 1.0; + vshort.d = 1.0; + + if (sizeof(unsigned int) == 4) + { + if (vint.c[zero_index] != 0) + zero = 1; + } + else if (sizeof(unsigned long) == 4) + { + if (vlong.c[zero_index] != 0) + zero = 1; + } + else if (sizeof(unsigned short) == 4) + { + if (vshort.c[zero_index] != 0) + zero = 1; + } + + exit (zero); +} +]])], + [ac_cv_c_double_middle_endian=no], + [ac_cv_c_double_middle_endian=yes], + [ac_cv_c_double_middle=unknown])]) +case $ac_cv_c_double_middle_endian in + yes) + m4_default([$1], + [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1, + [Define to 1 if your processor stores the words in a double in + middle-endian format (like some ARMs).])]) ;; + no) + $2 ;; + *) + m4_default([$3], + [AC_MSG_WARN([unknown double endianness +presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;; +esac +])dnl # AC_C_DOUBLE_MIDDLE_ENDIAN + + +AC_DEFUN(ERL_MONOTONIC_CLOCK, +[ + # CLOCK_MONOTONIC is buggy on MacOS (darwin), or at least on Big Sur + # and Monterey, since it may step backwards. + if test "$3" = "yes"; then + case $host_os in + darwin*) + default_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_RAW" + low_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_RAW_APPROX" + high_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_RAW";; + *) + default_resolution_clock_gettime_monotonic="CLOCK_HIGHRES CLOCK_BOOTTIME CLOCK_MONOTONIC" + low_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_FAST" + high_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_PRECISE";; + esac + else + case $host_os in + darwin*) + default_resolution_clock_gettime_monotonic="CLOCK_UPTIME_RAW" + low_resolution_clock_gettime_monotonic="CLOCK_UPTIME_RAW_APPROX" + high_resolution_clock_gettime_monotonic="CLOCK_UPTIME_RAW";; + *) + default_resolution_clock_gettime_monotonic="CLOCK_HIGHRES CLOCK_UPTIME CLOCK_MONOTONIC" + low_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_COARSE CLOCK_UPTIME_FAST" + high_resolution_clock_gettime_monotonic="CLOCK_UPTIME_PRECISE";; + esac + fi + + case "$1" in + high_resolution) + check_msg="high resolution " + prefer_resolution_clock_gettime_monotonic="$high_resolution_clock_gettime_monotonic" + ;; + low_resolution) + check_msg="low resolution " + prefer_resolution_clock_gettime_monotonic="$low_resolution_clock_gettime_monotonic" + ;; + custom_resolution) + check_msg="custom resolution " + prefer_resolution_clock_gettime_monotonic="$2" + ;; + *) + check_msg="custom " + prefer_resolution_clock_gettime_monotonic="$2" + ;; + esac + + clock_gettime_lib="" + AC_CHECK_LIB(rt, clock_gettime, [clock_gettime_lib="-lrt"]) + + save_LIBS="$LIBS" + LIBS="$LIBS $clock_gettime_lib" + + if test "$LD_MAY_BE_WEAK" != "no"; then + trust_test="#error May not be there due to weak linking" + else + trust_test="" + fi + + AC_CACHE_CHECK([for clock_gettime(CLOCK_MONOTONIC_RAW, _)], erl_cv_clock_gettime_monotonic_raw, + [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include <time.h> +$trust_test + ]], [[ + struct timespec ts; + long long result; + clock_gettime(CLOCK_MONOTONIC_RAW, &ts); + result = ((long long) ts.tv_sec) * 1000000000LL + + ((long long) ts.tv_nsec); + ]])],[erl_cv_clock_gettime_monotonic_raw=yes],[erl_cv_clock_gettime_monotonic_raw=no]) + ]) + + AC_CACHE_CHECK([for clock_gettime() with ${check_msg}monotonic clock type], erl_cv_clock_gettime_monotonic_$1, + [ + for clock_type in $prefer_resolution_clock_gettime_monotonic $default_resolution_clock_gettime_monotonic $high_resolution_clock_gettime_monotonic $low_resolution_clock_gettime_monotonic; do + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include <time.h> +$trust_test + ]], [[ + struct timespec ts; + long long result; + clock_gettime($clock_type,&ts); + result = ((long long) ts.tv_sec) * 1000000000LL + + ((long long) ts.tv_nsec); + ]])],[erl_cv_clock_gettime_monotonic_$1=$clock_type],[erl_cv_clock_gettime_monotonic_$1=no]) + test $erl_cv_clock_gettime_monotonic_$1 = no || break + done + ]) + + LIBS="$save_LIBS" + + AS_IF( + [test "$LD_MAY_BE_WEAK" != "no"], + [ + AC_CHECK_FUNCS([clock_get_attributes gethrtime]) + ], + [ + AC_CHECK_FUNCS([clock_getres clock_get_attributes gethrtime]) + ]) + + AC_CACHE_CHECK([for mach clock_get_time() with monotonic clock type], erl_cv_mach_clock_get_time_monotonic, + [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <mach/clock.h> +#include <mach/mach.h> + ]], [[ + kern_return_t res; + clock_serv_t clk_srv; + mach_timespec_t time_spec; + + host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &clk_srv); + res = clock_get_time(clk_srv, &time_spec); + mach_port_deallocate(mach_task_self(), clk_srv); + ]])],[erl_cv_mach_clock_get_time_monotonic=yes],[erl_cv_mach_clock_get_time_monotonic=no]) + ]) + + erl_corrected_monotonic_clock=no + case $erl_cv_clock_gettime_monotonic_$1-$ac_cv_func_gethrtime-$erl_cv_mach_clock_get_time_monotonic-$host_os in + *-*-*-win32) + erl_monotonic_clock_func=WindowsAPI + ;; + CLOCK_*-*-*-linux*) + case $erl_cv_clock_gettime_monotonic_$1-$erl_cv_clock_gettime_monotonic_raw in + CLOCK_BOOTTIME-yes|CLOCK_MONOTONIC-yes) + erl_corrected_monotonic_clock=yes + ;; + *) + # We don't trust CLOCK_MONOTONIC to be NTP + # adjusted on linux systems that do not have + # CLOCK_MONOTONIC_RAW (although it seems to + # be...) + ;; + esac + erl_monotonic_clock_func=clock_gettime + ;; + no-no-no-linux*) + erl_monotonic_clock_func=times + ;; + CLOCK_*-*-*-*) + erl_monotonic_clock_func=clock_gettime + ;; + no-yes-*-*) + erl_monotonic_clock_func=gethrtime + ;; + no-no-yes-*) + erl_monotonic_clock_func=mach_clock_get_time + ;; + no-no-no-*) + erl_monotonic_clock_func=none + ;; + esac + + erl_monotonic_clock_low_resolution=no + erl_monotonic_clock_lib= + erl_monotonic_clock_id= + case $erl_monotonic_clock_func in + clock_gettime) + erl_monotonic_clock_id=$erl_cv_clock_gettime_monotonic_$1 + for low_res_id in $low_resolution_clock_gettime_monotonic; do + if test $erl_monotonic_clock_id = $low_res_id; then + erl_monotonic_clock_low_resolution=yes + break + fi + done + erl_monotonic_clock_lib=$clock_gettime_lib + ;; + mach_clock_get_time) + erl_monotonic_clock_id=SYSTEM_CLOCK + ;; + times) + erl_monotonic_clock_low_resolution=yes + ;; + *) + ;; + esac + +]) + +AC_DEFUN(ERL_WALL_CLOCK, +[ + default_resolution_clock_gettime_wall="CLOCK_REALTIME" + low_resolution_clock_gettime_wall="CLOCK_REALTIME_COARSE CLOCK_REALTIME_FAST" + high_resolution_clock_gettime_wall="CLOCK_REALTIME_PRECISE" + + case "$1" in + high_resolution) + check_msg="high resolution " + prefer_resolution_clock_gettime_wall="$high_resolution_clock_gettime_wall" + ;; + low_resolution) + check_msg="low resolution " + prefer_resolution_clock_gettime_wall="$low_resolution_clock_gettime_wall" + ;; + custom_resolution) + check_msg="custom resolution " + prefer_resolution_clock_gettime_wall="$2" + ;; + *) + check_msg="" + prefer_resolution_clock_gettime_wall= + ;; + esac + + clock_gettime_lib="" + AC_CHECK_LIB(rt, clock_gettime, [clock_gettime_lib="-lrt"]) + + save_LIBS="$LIBS" + LIBS="$LIBS $clock_gettime_lib" + + if test "$LD_MAY_BE_WEAK" != "no"; then + trust_test="#error May not be there due to weak linking" + else + trust_test="" + fi + + AC_CACHE_CHECK([for clock_gettime() with ${check_msg}wall clock type], erl_cv_clock_gettime_wall_$1, + [ + for clock_type in $prefer_resolution_clock_gettime_wall $default_resolution_clock_gettime_wall $high_resolution_clock_gettime_wall $low_resolution_clock_gettime_wall; do + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include <time.h> +$trust_test + ]], [[ + struct timespec ts; + long long result; + clock_gettime($clock_type,&ts); + result = ((long long) ts.tv_sec) * 1000000000LL + + ((long long) ts.tv_nsec); + ]])],[erl_cv_clock_gettime_wall_$1=$clock_type],[erl_cv_clock_gettime_wall_$1=no]) + test $erl_cv_clock_gettime_wall_$1 = no || break + done + ]) + + LIBS="$save_LIBS" + + AS_IF([test "$LD_MAY_BE_WEAK" = "no"], + [ + AC_CHECK_FUNCS([clock_getres]) + ]) + + AC_CHECK_FUNCS([clock_get_attributes gettimeofday]) + + AC_CACHE_CHECK([for mach clock_get_time() with wall clock type], erl_cv_mach_clock_get_time_wall, + [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <mach/clock.h> +#include <mach/mach.h> + ]], [[ + kern_return_t res; + clock_serv_t clk_srv; + mach_timespec_t time_spec; + + host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &clk_srv); + res = clock_get_time(clk_srv, &time_spec); + mach_port_deallocate(mach_task_self(), clk_srv); + ]])],[erl_cv_mach_clock_get_time_wall=yes],[erl_cv_mach_clock_get_time_wall=no]) + ]) + + erl_wall_clock_lib= + erl_wall_clock_low_resolution=no + erl_wall_clock_id= + case $1-$erl_cv_clock_gettime_wall_$1-$erl_cv_mach_clock_get_time_wall-$ac_cv_func_gettimeofday-$host_os in + *-*-*-*-win32) + erl_wall_clock_func=WindowsAPI + erl_wall_clock_low_resolution=yes + ;; + high_resolution-no-yes-*-*) + erl_wall_clock_func=mach_clock_get_time + erl_wall_clock_id=CALENDAR_CLOCK + ;; + *-CLOCK_*-*-*-*) + erl_wall_clock_func=clock_gettime + erl_wall_clock_lib=$clock_gettime_lib + erl_wall_clock_id=$erl_cv_clock_gettime_wall_$1 + for low_res_id in $low_resolution_clock_gettime_wall; do + if test $erl_wall_clock_id = $low_res_id; then + erl_wall_clock_low_resolution=yes + break + fi + done + ;; + *-no-*-yes-*) + erl_wall_clock_func=gettimeofday + ;; + *) + erl_wall_clock_func=none + ;; + esac +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_CHECK_THR_LIB +dnl +dnl This macro may be used by any OTP application. +dnl +dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also +dnl checks for some pthread headers which will appear in DEFS or config.h. +dnl + +AC_DEFUN(LM_CHECK_THR_LIB, +[ + +NEED_NPTL_PTHREAD_H=no + +dnl win32? +AC_MSG_CHECKING([for native win32 threads]) +AS_IF( + [test "X$host_os" = "Xwin32"], + [ + AC_MSG_RESULT(yes) + THR_DEFS="-DWIN32_THREADS" + THR_LIBS= + THR_LIB_NAME=win32_threads + THR_LIB_TYPE=win32_threads + ], + [ + AC_MSG_RESULT(no) + THR_DEFS= + THR_LIBS= + THR_LIB_NAME= + THR_LIB_TYPE=posix_unknown + +dnl Try to find POSIX threads + +dnl The usual pthread lib... + AC_CHECK_LIB(pthread, pthread_create, THR_LIBS="-lpthread") + +dnl Very old versions of FreeBSD have pthreads in special c library, c_r... + AS_IF([test "x$THR_LIBS" = "x"], + [ + AC_CHECK_LIB([c_r], [pthread_create], [THR_LIBS="-lc_r"]) + ]) + +dnl QNX has pthreads in standard C library + AS_IF([test "x$THR_LIBS" = "x"], + [ + AC_CHECK_FUNC([pthread_create], [THR_LIBS="none_needed"]) + ]) + +dnl On ofs1 the '-pthread' switch should be used + AS_IF( + [test "x$THR_LIBS" = "x"], + [ + AC_MSG_CHECKING([if the '-pthread' switch can be used]) + saved_cflags=$CFLAGS + CFLAGS="$CFLAGS -pthread" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[pthread_create((void*)0,(void*)0,(void*)0,(void*)0);]])],[THR_DEFS="-pthread" + THR_LIBS="-pthread"],[]) + CFLAGS=$saved_cflags + if test "x$THR_LIBS" != "x"; then + AC_MSG_RESULT(yes) + else + AC_MSG_RESULT(no) + fi + ]) + + AS_IF( + [test "x$THR_LIBS" != "x"], + [ + THR_DEFS="$THR_DEFS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS" + THR_LIB_NAME=pthread + if test "x$THR_LIBS" = "xnone_needed"; then + THR_LIBS= + fi + AS_CASE( + [$host_os], + [solaris*], + [ + THR_DEFS="$THR_DEFS -D_POSIX_PTHREAD_SEMANTICS" + ], + [linux*], + [ + THR_DEFS="$THR_DEFS -D_POSIX_THREAD_SAFE_FUNCTIONS" + + LM_CHECK_GETCONF + AC_MSG_CHECKING(for Native POSIX Thread Library) + libpthr_vsn=`$GETCONF GNU_LIBPTHREAD_VERSION 2>/dev/null` + if test $? -eq 0; then + case "$libpthr_vsn" in + *nptl*|*NPTL*) nptl=yes;; + *) nptl=no;; + esac + elif test "$cross_compiling" = "yes"; then + case "$erl_xcomp_linux_nptl" in + "") nptl=cross;; + yes|no) nptl=$erl_xcomp_linux_nptl;; + *) AC_MSG_ERROR([Bad erl_xcomp_linux_nptl value: $erl_xcomp_linux_nptl]);; + esac + else + nptl=no + fi + AC_MSG_RESULT($nptl) + if test $nptl = cross; then + nptl=yes + AC_MSG_WARN([result yes guessed because of cross compilation]) + fi + AS_IF( + [test $nptl = yes], + [ + THR_LIB_TYPE=posix_nptl + need_nptl_incldir=no + AC_CHECK_HEADER([nptl/pthread.h], + [need_nptl_incldir=yes + NEED_NPTL_PTHREAD_H=yes]) + AS_IF( + [test $need_nptl_incldir = yes], + [ + # Ahh... + nptl_path="$C_INCLUDE_PATH:$CPATH" + if test X$cross_compiling != Xyes; then + nptl_path="$nptl_path:/usr/local/include:/usr/include" + else + IROOT="$erl_xcomp_isysroot" + test "$IROOT" != "" || IROOT="$erl_xcomp_sysroot" + test "$IROOT" != "" || AC_MSG_ERROR([Don't know where to search for includes! Please set erl_xcomp_isysroot]) + nptl_path="$nptl_path:$IROOT/usr/local/include:$IROOT/usr/include" + fi + nptl_ws_path= + save_ifs="$IFS"; IFS=":" + for dir in $nptl_path; do + if test "x$dir" != "x"; then + nptl_ws_path="$nptl_ws_path $dir" + fi + done + IFS=$save_ifs + nptl_incldir= + for dir in $nptl_ws_path; do + AC_CHECK_HEADER([$dir/nptl/pthread.h], + [nptl_incldir=$dir/nptl]) + if test "x$nptl_incldir" != "x"; then + THR_DEFS="$THR_DEFS -isystem $nptl_incldir" + break + fi + done + if test "x$nptl_incldir" = "x"; then + AC_MSG_ERROR(Failed to locate nptl system include directory) + fi + ]) + ]) + ]) + + dnl We sometimes need THR_DEFS in order to find certain headers + dnl (at least for pthread.h on osf1). + saved_cppflags=$CPPFLAGS + CPPFLAGS="$CPPFLAGS $THR_DEFS" + + dnl + dnl Check for headers + dnl + + AC_CHECK_HEADER(pthread.h, + AC_DEFINE(HAVE_PTHREAD_H, 1, \ +[Define if you have the <pthread.h> header file.])) + + dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h> + AC_CHECK_HEADER(pthread/mit/pthread.h, \ + AC_DEFINE(HAVE_MIT_PTHREAD_H, 1, \ +[Define if the pthread.h header file is in pthread/mit directory.])) + + dnl restore CPPFLAGS + CPPFLAGS=$saved_cppflags + + ]) + ]) + +]) + +AC_DEFUN(ERL_INTERNAL_LIBS, +[ + +ERTS_INTERNAL_X_LIBS= + +AC_CHECK_LIB(kstat, kstat_open, +[AC_DEFINE(HAVE_KSTAT, 1, [Define if you have kstat]) +ERTS_INTERNAL_X_LIBS="$ERTS_INTERNAL_X_LIBS -lkstat"]) + +AC_SUBST(ERTS_INTERNAL_X_LIBS) + +]) + +AC_DEFUN(ETHR_CHK_GCC_ATOMIC_OP__, +[ + # $1 - atomic_op + + for atomic_bit_size in 32 64 128; do + case $atomic_bit_size in + 32) gcc_atomic_type="$gcc_atomic_type32";; + 64) gcc_atomic_type="$gcc_atomic_type64";; + 128) gcc_atomic_type="$gcc_atomic_type128";; + esac + gcc_atomic_lockfree="int x[[(2*__atomic_always_lock_free(sizeof($gcc_atomic_type), 0))-1]]" + case $1 in + __sync_add_and_fetch | __sync_fetch_and_and | __sync_fetch_and_or) + atomic_call="volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0);" + ;; + __sync_val_compare_and_swap) + atomic_call="volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0, ($gcc_atomic_type) 0);" + ;; + __atomic_store_n) + atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELAXED); $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELEASE);" + ;; + __atomic_load_n) + atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, __ATOMIC_RELAXED); res = $1(&var, __ATOMIC_ACQUIRE);" + ;; + __atomic_add_fetch| __atomic_fetch_and | __atomic_fetch_or) + atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELAXED); res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_ACQUIRE); res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELEASE);" + ;; + __atomic_compare_exchange_n) + atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type val; int res = $1(&var, &val, ($gcc_atomic_type) 0, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); res = $1(&var, &val, ($gcc_atomic_type) 0, 0, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);" + ;; + *) + AC_MSG_ERROR([Internal error: missing implementation for $1]) + ;; + esac + eval atomic${atomic_bit_size}_call=\"$atomic_call\" + done + + AC_CACHE_CHECK([for 32-bit $1()], ethr_cv_32bit_$1, + [ + ethr_cv_32bit_$1=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[$atomic32_call]])],[ethr_cv_32bit_$1=yes],[]) + ]) + AC_CACHE_CHECK([for 64-bit $1()], ethr_cv_64bit_$1, + [ + ethr_cv_64bit_$1=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[$atomic64_call]])],[ethr_cv_64bit_$1=yes],[]) + ]) + AC_CACHE_CHECK([for 128-bit $1()], ethr_cv_128bit_$1, + [ + ethr_cv_128bit_$1=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[$atomic128_call]])],[ethr_cv_128bit_$1=yes],[]) + ]) + + case $ethr_cv_128bit_$1-$ethr_cv_64bit_$1-$ethr_cv_32bit_$1 in + no-no-no) + have_atomic_ops=0;; + no-no-yes) + have_atomic_ops=4;; + no-yes-no) + have_atomic_ops=8;; + no-yes-yes) + have_atomic_ops=12;; + yes-no-no) + have_atomic_ops=16;; + yes-no-yes) + have_atomic_ops=20;; + yes-yes-no) + have_atomic_ops=24;; + yes-yes-yes) + have_atomic_ops=28;; + esac + AC_DEFINE_UNQUOTED([ETHR_HAVE_$1], [$have_atomic_ops], [Define as a bitmask corresponding to the word sizes that $1() can handle on your system]) +]) + +AC_DEFUN(ETHR_CHK_IF_NOOP, +[ + ethr_test_filename="chk_if_$1$3_noop_config1test.$$" + cat > "${ethr_test_filename}.c" <<EOF +int +my_test(void) +{ + $1$2; + return 0; +} +EOF + $CC -O3 $ETHR_DEFS -c "${ethr_test_filename}.c" -o "${ethr_test_filename}1.o" + cat > "${ethr_test_filename}.c" <<EOF +int +my_test(void) +{ + ; + return 0; +} +EOF + $CC -O3 $ETHR_DEFS -c "${ethr_test_filename}.c" -o "${ethr_test_filename}2.o" + if diff "${ethr_test_filename}1.o" "${ethr_test_filename}2.o" >/dev/null 2>&1; then + ethr_$1$3_noop=yes + else + ethr_$1$3_noop=no + fi + rm -f "${ethr_test_filename}.c" "${ethr_test_filename}1.o" "${ethr_test_filename}2.o" +]) + +AC_DEFUN(ETHR_CHK_GCC_ATOMIC_OPS, +[ + AC_CHECK_SIZEOF(short) + AC_CHECK_SIZEOF(int) + AC_CHECK_SIZEOF(long) + AC_CHECK_SIZEOF(long long) + AC_CHECK_SIZEOF(__int128_t) + + if test "$ac_cv_sizeof_short" = "4"; then + gcc_atomic_type32="short" + elif test "$ac_cv_sizeof_int" = "4"; then + gcc_atomic_type32="int" + elif test "$ac_cv_sizeof_long" = "4"; then + gcc_atomic_type32="long" + else + AC_MSG_ERROR([No 32-bit type found]) + fi + + if test "$ac_cv_sizeof_int" = "8"; then + gcc_atomic_type64="int" + elif test "$ac_cv_sizeof_long" = "8"; then + gcc_atomic_type64="long" + elif test "$ac_cv_sizeof_long_long" = "8"; then + gcc_atomic_type64="long long" + else + AC_MSG_ERROR([No 64-bit type found]) + fi + + if test "$ac_cv_sizeof___int128_t" = "16"; then + gcc_atomic_type128="__int128_t" + else + gcc_atomic_type128="#error " + fi + AC_CACHE_CHECK([for a working __sync_synchronize()], ethr_cv___sync_synchronize, + [ + ethr_cv___sync_synchronize=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ __sync_synchronize(); ]])],[ethr_cv___sync_synchronize=yes],[]) + if test $ethr_cv___sync_synchronize = yes; then + # + # Old gcc versions on at least x86 have a buggy + # __sync_synchronize() which does not emit a + # memory barrier. We try to detect this by + # compiling to assembly with and without + # __sync_synchronize() and compare the results. + # + ETHR_CHK_IF_NOOP(__sync_synchronize, [()], []) + if test $ethr___sync_synchronize_noop = yes; then + # Got a buggy implementation of + # __sync_synchronize... + ethr_cv___sync_synchronize="no; buggy implementation" + fi + fi + ]) + + if test "$ethr_cv___sync_synchronize" = "yes"; then + have_sync_synchronize_value="~0" + else + have_sync_synchronize_value="0" + fi + AC_DEFINE_UNQUOTED([ETHR_HAVE___sync_synchronize], [$have_sync_synchronize_value], [Define as a bitmask corresponding to the word sizes that __sync_synchronize() can handle on your system]) + + ETHR_CHK_GCC_ATOMIC_OP__(__sync_add_and_fetch) + ETHR_CHK_GCC_ATOMIC_OP__(__sync_fetch_and_and) + ETHR_CHK_GCC_ATOMIC_OP__(__sync_fetch_and_or) + ETHR_CHK_GCC_ATOMIC_OP__(__sync_val_compare_and_swap) + + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_store_n) + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_load_n) + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_add_fetch) + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_fetch_and) + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_fetch_or) + ETHR_CHK_GCC_ATOMIC_OP__(__atomic_compare_exchange_n) + + ethr_have_gcc_native_atomics=no + ethr_arm_dbm_sy_instr_val=0 + ethr_arm_dbm_st_instr_val=0 + ethr_arm_dbm_ld_instr_val=0 + ethr_arm_isb_sy_instr_val=0 + ethr_arm_dc_cvau_instr_val=0 + ethr_arm_ic_ivau_instr_val=0 + AS_CASE( + ["$GCC-$host_cpu"], + [yes-arm*|yes-aarch*], + [ + AC_CACHE_CHECK([for ARM 'dmb sy' instruction], ethr_cv_arm_dbm_sy_instr, + [ + ethr_cv_arm_dbm_sy_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + __asm__ __volatile__("dmb sy" : : : "memory"); + ]])],[ethr_cv_arm_dbm_sy_instr=yes],[]) + ]) + if test $ethr_cv_arm_dbm_sy_instr = yes; then + ethr_arm_dbm_sy_instr_val=1 + test $ethr_cv_64bit___atomic_compare_exchange_n = yes && + ethr_have_gcc_native_atomics=yes + fi + AC_CACHE_CHECK([for ARM 'dmb st' instruction], ethr_cv_arm_dbm_st_instr, + [ + ethr_cv_arm_dbm_st_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + __asm__ __volatile__("dmb st" : : : "memory"); + ]])],[ethr_cv_arm_dbm_st_instr=yes],[]) + ]) + if test $ethr_cv_arm_dbm_st_instr = yes; then + ethr_arm_dbm_st_instr_val=1 + fi + AC_CACHE_CHECK([for ARM 'dmb ld' instruction], ethr_cv_arm_dbm_ld_instr, + [ + ethr_cv_arm_dbm_ld_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + __asm__ __volatile__("dmb ld" : : : "memory"); + ]])],[ethr_cv_arm_dbm_ld_instr=yes],[]) + ]) + if test $ethr_cv_arm_dbm_ld_instr = yes; then + ethr_arm_dbm_ld_instr_val=1 + fi + AC_CACHE_CHECK([for ARM 'isb sy' instruction], ethr_cv_arm_isb_sy_instr, + [ + ethr_cv_arm_isb_sy_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + __asm__ __volatile__("isb sy" : : : "memory"); + ]])],[ethr_cv_arm_isb_sy_instr=yes],[]) + ]) + if test $ethr_cv_arm_isb_sy_instr = yes; then + ethr_arm_isb_sy_instr_val=1 + fi + AC_CACHE_CHECK([for ARM 'dc cvau' instruction], ethr_cv_arm_dc_cvau_instr, + [ + ethr_cv_arm_dc_cvau_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + char data[512]; __asm__ __volatile__("dc cvau, %0" : "r" (data) : : "memory"); + ]])],[ethr_cv_arm_dc_cvau_instr=yes],[]) + ]) + if test $ethr_cv_arm_dc_cvau_instr = yes; then + ethr_arm_dc_cvau_instr_val=1 + fi + AC_CACHE_CHECK([for ARM 'ic ivau' instruction], ethr_cv_arm_ic_ivau_instr, + [ + ethr_cv_arm_ic_ivau_instr=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ + char data[512]; __asm__ __volatile__("ic ivau, %0" : "r" (data) : : "memory"); + ]])],[ethr_cv_arm_ic_ivau_instr=yes],[]) + ]) + if test $ethr_cv_arm_ic_ivau_instr = yes; then + ethr_arm_ic_ivau_instr_val=1 + fi + ]) + + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_DMB_INSTRUCTION], [$ethr_arm_dbm_sy_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'dmb sy' instruction, and are compiling for an ARM processor with ARM DMB instruction support, or not]) + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_DMB_ST_INSTRUCTION], [$ethr_arm_dbm_st_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'dmb st' instruction, and are compiling for an ARM processor with ARM DMB instruction support, or not]) + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_DMB_LD_INSTRUCTION], [$ethr_arm_dbm_ld_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'dmb ld' instruction, and are compiling for an ARM processor with ARM DMB instruction support, or not]) + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_ISB_SY_INSTRUCTION], [$ethr_arm_isb_sy_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'isb sy' instruction, and are compiling for an ARM processor with ARM ISB instruction support, or not]) + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_DC_CVAU_INSTRUCTION], [$ethr_arm_dc_cvau_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'dc cvau' instruction, and are compiling for an ARM processor with ARM DC instruction support, or not]) + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_IC_IVAU_INSTRUCTION], [$ethr_arm_ic_ivau_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM 'ic ivau' instruction, and are compiling for an ARM processor with ARM IC instruction support, or not]) + + test $ethr_cv_32bit___sync_val_compare_and_swap = yes && + ethr_have_gcc_native_atomics=yes + test $ethr_cv_64bit___sync_val_compare_and_swap = yes && + ethr_have_gcc_native_atomics=yes + if test "$ethr_cv___sync_synchronize" = "yes"; then + test $ethr_cv_64bit___atomic_compare_exchange_n = yes && + ethr_have_gcc_native_atomics=yes + test $ethr_cv_32bit___atomic_compare_exchange_n = yes && + ethr_have_gcc_native_atomics=yes + fi + ethr_have_gcc_atomic_builtins=0 + if test $ethr_have_gcc_native_atomics = yes; then + ethr_native_atomic_implementation=gcc_sync + test $ethr_cv_32bit___atomic_compare_exchange_n = yes && ethr_have_gcc_atomic_builtins=1 + test $ethr_cv_64bit___atomic_compare_exchange_n = yes && ethr_have_gcc_atomic_builtins=1 + test $ethr_have_gcc_atomic_builtins = 1 && ethr_native_atomic_implementation=gcc_atomic_sync + fi + AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC___ATOMIC_BUILTINS], [$ethr_have_gcc_atomic_builtins], [Define as a boolean indicating whether you have a gcc __atomic builtins or not]) + test $ethr_have_gcc_native_atomics = yes && ethr_have_native_atomics=yes +]) + +AC_DEFUN(ETHR_CHK_INTERLOCKED, +[ + ilckd="$1" + AC_MSG_CHECKING([for ${ilckd}()]) + case "$2" in + "1") ilckd_call="${ilckd}(var);";; + "2") ilckd_call="${ilckd}(var, ($3) 0);";; + "3") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0);";; + "4") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0, arr);";; + esac + have_interlocked_op=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #define WIN32_LEAN_AND_MEAN + #include <windows.h> + #include <intrin.h> + ]], [[ + volatile $3 *var; + volatile $3 arr[2]; + + $ilckd_call + return 0; + ]])],[have_interlocked_op=yes],[]) + test $have_interlocked_op = yes && $4 + AC_MSG_RESULT([$have_interlocked_op]) +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl ERL_FIND_ETHR_LIB +dnl +dnl NOTE! This macro may be changed at any time! Should *only* be used by +dnl ERTS! +dnl +dnl Find a thread library to use. Sets ETHR_LIBS to libraries to link +dnl with, ETHR_X_LIBS to extra libraries to link with (same as ETHR_LIBS +dnl except that the ethread lib itself is not included), ETHR_DEFS to +dnl defines to compile with, ETHR_THR_LIB_BASE to the name of the +dnl thread library which the ethread library is based on, and ETHR_LIB_NAME +dnl to the name of the library where the ethread implementation is located. +dnl ERL_FIND_ETHR_LIB currently searches for 'pthreads', and +dnl 'win32_threads'. If no thread library was found ETHR_LIBS, ETHR_X_LIBS, +dnl ETHR_DEFS, ETHR_THR_LIB_BASE, and ETHR_LIB_NAME are all set to the +dnl empty string. +dnl + +AC_DEFUN(ERL_FIND_ETHR_LIB, +[ + +AC_ARG_ENABLE(native-ethr-impls, + AS_HELP_STRING([--disable-native-ethr-impls], + [disable native ethread implementations]), +[ case "$enableval" in + no) disable_native_ethr_impls=yes ;; + *) disable_native_ethr_impls=no ;; + esac ], disable_native_ethr_impls=no) + +test "X$disable_native_ethr_impls" = "Xyes" && + AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations]) + +AC_ARG_ENABLE(x86-out-of-order, + AS_HELP_STRING([--enable-x86-out-of-order], + [enable x86/x84_64 out of order support (default disabled)])) + +AC_ARG_ENABLE(prefer-gcc-native-ethr-impls, + AS_HELP_STRING([--enable-prefer-gcc-native-ethr-impls], + [prefer gcc native ethread implementations]), +[ case "$enableval" in + yes) enable_prefer_gcc_native_ethr_impls=yes ;; + *) enable_prefer_gcc_native_ethr_impls=no ;; + esac ], enable_prefer_gcc_native_ethr_impls=no) + +test $enable_prefer_gcc_native_ethr_impls = yes && + AC_DEFINE(ETHR_PREFER_GCC_NATIVE_IMPLS, 1, [Define if you prefer gcc native ethread implementations]) + +AC_ARG_ENABLE(trust-gcc-atomic-builtins-memory-barriers, + AS_HELP_STRING([--enable-trust-gcc-atomic-builtins-memory-barriers], + [trust gcc atomic builtins memory barriers]), +[ case "$enableval" in + yes) trust_gcc_atomic_builtins_mbs=1 ;; + *) trust_gcc_atomic_builtins_mbs=0 ;; + esac ], trust_gcc_atomic_builtins_mbs=0) + +AC_DEFINE_UNQUOTED(ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS, [$trust_gcc_atomic_builtins_mbs], [Define as a boolean indicating whether you trust gcc's __atomic_* builtins memory barrier implementations, or not]) + +AC_ARG_WITH(libatomic_ops, + AS_HELP_STRING([--with-libatomic_ops=PATH], + [specify and prefer usage of libatomic_ops in the ethread library])) + +AC_ARG_WITH(with_sparc_memory_order, + AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO], + [specify sparc memory order (defaults to RMO)])) + +AC_ARG_ENABLE(ppc-lwsync-instruction, +AS_HELP_STRING([--enable-ppc-lwsync-instruction], [enable use of powerpc lwsync instruction]) +AS_HELP_STRING([--disable-ppc-lwsync-instruction], [disable use of powerpc lwsync instruction]), +[ case "$enableval" in + no) enable_lwsync=no ;; + *) enable_lwsync=yes ;; + esac ], +[ + AC_CHECK_SIZEOF(void *) + case $host_cpu-$ac_cv_sizeof_void_p in + macppc-8|powerpc-8|ppc-8|powerpc64-8|ppc64-8|powerpc64le-8|ppc64le-8|"Power Macintosh"-8) + enable_lwsync=yes;; + *) + enable_lwsync=undefined;; + esac ]) + +case $enable_lwsync in + no) + AC_DEFINE(ETHR_PPC_HAVE_NO_LWSYNC, [1], [Define if you do not have the powerpc lwsync instruction]) + ;; + yes) + AC_DEFINE(ETHR_PPC_HAVE_LWSYNC, [1], [Define if you have the powerpc lwsync instruction]) + ;; + *) + ;; +esac + +LM_CHECK_THR_LIB +ERL_INTERNAL_LIBS + +ERL_MONOTONIC_CLOCK(try_find_pthread_compatible, CLOCK_HIGHRES CLOCK_UPTIME_RAW CLOCK_MONOTONIC, no) + +case $erl_monotonic_clock_func in + clock_gettime) + AC_DEFINE(ETHR_HAVE_CLOCK_GETTIME_MONOTONIC, [1], [Define if you have a clock_gettime() with a monotonic clock]) + ;; + mach_clock_get_time) + AC_DEFINE(ETHR_HAVE_MACH_CLOCK_GET_TIME, [1], [Define if you have a mach clock_get_time() with a monotonic clock]) + ;; + gethrtime) + AC_DEFINE(ETHR_HAVE_GETHRTIME, [1], [Define if you have a monotonic gethrtime()]) + ;; + *) + ;; +esac + +if test "x$erl_monotonic_clock_id" != "x"; then + AC_DEFINE_UNQUOTED(ETHR_MONOTONIC_CLOCK_ID, [$erl_monotonic_clock_id], [Define to the monotonic clock id to use]) +fi + +ethr_native_atomic_implementation=none +ethr_have_native_atomics=no +ethr_have_native_spinlock=no +ETHR_THR_LIB_BASE="$THR_LIB_NAME" +ETHR_THR_LIB_BASE_TYPE="$THR_LIB_TYPE" +ETHR_DEFS="$THR_DEFS" +ETHR_X_LIBS="$THR_LIBS $ERTS_INTERNAL_X_LIBS $erl_monotonic_clock_lib" +ETHR_LIBS= +ETHR_LIB_NAME= + +ethr_modified_default_stack_size= + +AC_ARG_WITH(threadnames, +AS_HELP_STRING([--with-threadnames], [use pthread_setname to set the thread names (default)]) +AS_HELP_STRING([--without-threadnames], + [do not set any thread names]), +[], +[with_threadnames=yes]) + +dnl Name of lib where ethread implementation is located +ethr_lib_name=ethread + +AS_CASE( + ["$THR_LIB_NAME"], + [win32_threads], + [ + ETHR_THR_LIB_BASE_DIR=win + # * _WIN32_WINNT >= 0x0400 is needed for + # TryEnterCriticalSection + # * _WIN32_WINNT >= 0x0403 is needed for + # InitializeCriticalSectionAndSpinCount + # The ethread lib will refuse to build if _WIN32_WINNT < 0x0403. + # + # -D_WIN32_WINNT should have been defined in $CPPFLAGS; fetch it + # and save it in ETHR_DEFS. + found_win32_winnt=no + for cppflag in $CPPFLAGS; do + case $cppflag in + -DWINVER*) + ETHR_DEFS="$ETHR_DEFS $cppflag" + ;; + -D_WIN32_WINNT*) + ETHR_DEFS="$ETHR_DEFS $cppflag" + found_win32_winnt=yes + ;; + *) + ;; + esac + done + if test $found_win32_winnt = no; then + AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS]) + fi + + AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads]) + + if test "X$disable_native_ethr_impls" = "Xyes"; then + have_interlocked_op=no + ethr_have_native_atomics=no + else + ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()])) + ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()])) + ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()])) + ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()])) + ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()])) + ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()])) + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_acq], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_ACQ, 1, [Define if you have _InterlockedCompareExchange_acq()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_rel], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_REL, 1, [Define if you have _InterlockedCompareExchange_rel()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + + ETHR_CHK_INTERLOCKED([_InterlockedDecrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()])) + ETHR_CHK_INTERLOCKED([_InterlockedDecrement64_rel], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64_REL, 1, [Define if you have _InterlockedDecrement64_rel()])) + ETHR_CHK_INTERLOCKED([_InterlockedIncrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()])) + ETHR_CHK_INTERLOCKED([_InterlockedIncrement64_acq], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64_ACQ, 1, [Define if you have _InterlockedIncrement64_acq()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64_acq], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64_ACQ, 1, [Define if you have _InterlockedExchangeAdd64_acq()])) + ETHR_CHK_INTERLOCKED([_InterlockedAnd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()])) + ETHR_CHK_INTERLOCKED([_InterlockedOr64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()])) + ETHR_CHK_INTERLOCKED([_InterlockedExchange64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()])) + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_acq], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_ACQ, 1, [Define if you have _InterlockedCompareExchange64_acq()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_rel], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_REL, 1, [Define if you have _InterlockedCompareExchange64_rel()])) + test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes + + ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()])) + fi + if test "$ethr_have_native_atomics" = "yes"; then + ethr_native_atomic_implementation=windows + ethr_have_native_spinlock=yes + fi + ], + [pthread], + [ + ETHR_THR_LIB_BASE_DIR=pthread + AC_DEFINE(ETHR_PTHREADS, 1, [Define if you have pthreads]) + case $host_os in + openbsd*) + # The default stack size is insufficient for our needs + # on OpenBSD. We increase it to 256 kilo words. + ethr_modified_default_stack_size=256;; + linux*) + ETHR_DEFS="$ETHR_DEFS -D_GNU_SOURCE" + + if test X$cross_compiling = Xyes; then + case X$erl_xcomp_linux_usable_sigusrx in + X) usable_sigusrx=cross;; + Xyes|Xno) usable_sigusrx=$erl_xcomp_linux_usable_sigusrx;; + *) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigusrx value: $erl_xcomp_linux_usable_sigusrx]);; + esac + case X$erl_xcomp_linux_usable_sigaltstack in + X) usable_sigaltstack=cross;; + Xyes|Xno) usable_sigaltstack=$erl_xcomp_linux_usable_sigaltstack;; + *) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigaltstack value: $erl_xcomp_linux_usable_sigaltstack]);; + esac + else + # FIXME: Test for actual problems instead of kernel versions + linux_kernel_vsn_=`uname -r` + case $linux_kernel_vsn_ in + [[0-1]].*|2.[[0-1]]|2.[[0-1]].*) + usable_sigusrx=no + usable_sigaltstack=no;; + 2.[[2-3]]|2.[[2-3]].*) + usable_sigusrx=yes + usable_sigaltstack=no;; + *) + usable_sigusrx=yes + usable_sigaltstack=yes;; + esac + fi + + AC_MSG_CHECKING(if SIGUSR1 and SIGUSR2 can be used) + AC_MSG_RESULT($usable_sigusrx) + if test $usable_sigusrx = cross; then + usable_sigusrx=yes + AC_MSG_WARN([result yes guessed because of cross compilation]) + fi + if test $usable_sigusrx = no; then + ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGUSRX" + fi + + AC_MSG_CHECKING(if sigaltstack can be used) + AC_MSG_RESULT($usable_sigaltstack) + if test $usable_sigaltstack = cross; then + usable_sigaltstack=yes + AC_MSG_WARN([result yes guessed because of cross compilation]) + fi + if test $usable_sigaltstack = no; then + ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGALTSTACK" + fi + ;; + *) ;; + esac + + dnl We sometimes need ETHR_DEFS in order to find certain headers + dnl (at least for pthread.h on osf1). + saved_cppflags="$CPPFLAGS" + CPPFLAGS="$CPPFLAGS $ETHR_DEFS" + + dnl We need the thread library in order to find some functions + saved_libs="$LIBS" + LIBS="$LIBS $ETHR_X_LIBS" + + dnl + dnl Check for headers + dnl + AC_CHECK_HEADER(pthread.h, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_H, 1, \ +[Define if you have the <pthread.h> header file.])) + + dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h> + AC_CHECK_HEADER(pthread/mit/pthread.h, \ + AC_DEFINE(ETHR_HAVE_MIT_PTHREAD_H, 1, \ +[Define if the pthread.h header file is in pthread/mit directory.])) + + if test $NEED_NPTL_PTHREAD_H = yes; then + AC_DEFINE(ETHR_NEED_NPTL_PTHREAD_H, 1, \ +[Define if you need the <nptl/pthread.h> header file.]) + fi + + AC_CHECK_HEADER(sched.h, \ + AC_DEFINE(ETHR_HAVE_SCHED_H, 1, \ +[Define if you have the <sched.h> header file.])) + + AC_CHECK_HEADER(sys/time.h, \ + AC_DEFINE(ETHR_HAVE_SYS_TIME_H, 1, \ +[Define if you have the <sys/time.h> header file.])) + + AC_MSG_CHECKING([for usable PTHREAD_STACK_MIN]) + pthread_stack_min=no + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <limits.h> +#if defined(ETHR_NEED_NPTL_PTHREAD_H) +#include <nptl/pthread.h> +#elif defined(ETHR_HAVE_MIT_PTHREAD_H) +#include <pthread/mit/pthread.h> +#elif defined(ETHR_HAVE_PTHREAD_H) +#include <pthread.h> +#endif + ]], [[return PTHREAD_STACK_MIN;]])],[pthread_stack_min=yes],[]) + + AC_MSG_RESULT([$pthread_stack_min]) + test $pthread_stack_min != yes || { + AC_DEFINE(ETHR_HAVE_USABLE_PTHREAD_STACK_MIN, 1, [Define if you can use PTHREAD_STACK_MIN]) + } + + dnl + dnl Check for functions + dnl + AC_CHECK_FUNC([pthread_spin_lock], \ + [ethr_have_native_spinlock=yes \ + AC_DEFINE(ETHR_HAVE_PTHREAD_SPIN_LOCK, 1, \ +[Define if you have the pthread_spin_lock function.])]) + + have_sched_yield=no + have_librt_sched_yield=no + AC_CHECK_FUNC([sched_yield], [have_sched_yield=yes]) + AS_IF( + [test $have_sched_yield = no], + [ + AC_CHECK_LIB([rt], [sched_yield], + [have_librt_sched_yield=yes + ETHR_X_LIBS="$ETHR_X_LIBS -lrt"]) + ]) + AS_IF( + [test $have_sched_yield = yes || test $have_librt_sched_yield = yes], + [ + AC_DEFINE(ETHR_HAVE_SCHED_YIELD, 1, [Define if you have the sched_yield() function.]) + AC_MSG_CHECKING([whether sched_yield() returns an int]) + sched_yield_ret_int=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #ifdef ETHR_HAVE_SCHED_H + #include <sched.h> + #endif + ]], [[int sched_yield();]])],[sched_yield_ret_int=yes],[]) + AC_MSG_RESULT([$sched_yield_ret_int]) + if test $sched_yield_ret_int = yes; then + AC_DEFINE(ETHR_SCHED_YIELD_RET_INT, 1, [Define if sched_yield() returns an int.]) + fi + ]) + + have_pthread_yield=no + AC_CHECK_FUNC([pthread_yield], [have_pthread_yield=yes]) + AS_IF( + [test $have_pthread_yield = yes], + [ + AC_DEFINE(ETHR_HAVE_PTHREAD_YIELD, 1, [Define if you have the pthread_yield() function.]) + AC_MSG_CHECKING([whether pthread_yield() returns an int]) + pthread_yield_ret_int=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #if defined(ETHR_NEED_NPTL_PTHREAD_H) + #include <nptl/pthread.h> + #elif defined(ETHR_HAVE_MIT_PTHREAD_H) + #include <pthread/mit/pthread.h> + #elif defined(ETHR_HAVE_PTHREAD_H) + #include <pthread.h> + #endif + ]], [[int pthread_yield();]])],[pthread_yield_ret_int=yes],[]) + AC_MSG_RESULT([$pthread_yield_ret_int]) + if test $pthread_yield_ret_int = yes; then + AC_DEFINE(ETHR_PTHREAD_YIELD_RET_INT, 1, [Define if pthread_yield() returns an int.]) + fi + ]) + + have_pthread_rwlock_init=no + AC_CHECK_FUNC(pthread_rwlock_init, [have_pthread_rwlock_init=yes]) + AS_IF( + [test $have_pthread_rwlock_init = yes], + [ + ethr_have_pthread_rwlockattr_setkind_np=no + AC_CHECK_FUNC(pthread_rwlockattr_setkind_np, + [ethr_have_pthread_rwlockattr_setkind_np=yes]) + + AS_IF( + [test $ethr_have_pthread_rwlockattr_setkind_np = yes], + [ + AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP, 1, \ +[Define if you have the pthread_rwlockattr_setkind_np() function.]) + + AC_MSG_CHECKING([for PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP]) + ethr_pthread_rwlock_writer_nonrecursive_initializer_np=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #if defined(ETHR_NEED_NPTL_PTHREAD_H) + #include <nptl/pthread.h> + #elif defined(ETHR_HAVE_MIT_PTHREAD_H) + #include <pthread/mit/pthread.h> + #elif defined(ETHR_HAVE_PTHREAD_H) + #include <pthread.h> + #endif + ]], [[ + pthread_rwlockattr_t *attr; + return pthread_rwlockattr_setkind_np(attr, + PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP); + ]])],[ethr_pthread_rwlock_writer_nonrecursive_initializer_np=yes],[]) + AC_MSG_RESULT([$ethr_pthread_rwlock_writer_nonrecursive_initializer_np]) + if test $ethr_pthread_rwlock_writer_nonrecursive_initializer_np = yes; then + AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 1, \ +[Define if you have the PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP rwlock attribute.]) + fi + ]) + ]) + + if test "$force_pthread_rwlocks" = "yes"; then + + AC_DEFINE(ETHR_FORCE_PTHREAD_RWLOCK, 1, \ +[Define if you want to force usage of pthread rwlocks]) + + if test $have_pthread_rwlock_init = yes; then + AC_MSG_WARN([Forced usage of pthread rwlocks. Note that this implementation may suffer from starvation issues.]) + else + AC_MSG_ERROR([User forced usage of pthread rwlock, but no such implementation was found]) + fi + fi + + AC_CHECK_FUNC(pthread_attr_setguardsize, \ + AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \ +[Define if you have the pthread_attr_setguardsize function.])) + + AS_IF( + [test "x$erl_monotonic_clock_id" != "x"], + [ + AC_MSG_CHECKING(whether pthread_cond_timedwait() can use the monotonic clock $erl_monotonic_clock_id for timeout) + pthread_cond_timedwait_monotonic=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #if defined(ETHR_NEED_NPTL_PTHREAD_H) + # include <nptl/pthread.h> + #elif defined(ETHR_HAVE_MIT_PTHREAD_H) + # include <pthread/mit/pthread.h> + #elif defined(ETHR_HAVE_PTHREAD_H) + # include <pthread.h> + #endif + #include <time.h> + #ifdef ETHR_HAVE_SYS_TIME_H + # include <sys/time.h> + #endif + #if defined(ETHR_HAVE_MACH_CLOCK_GET_TIME) + # include <mach/clock.h> + # include <mach/mach.h> + #endif + ]], [[ + int res; + pthread_condattr_t attr; + pthread_cond_t cond; + struct timespec cond_timeout; + pthread_mutex_t mutex; + res = pthread_condattr_init(&attr); + res = pthread_condattr_setclock(&attr, ETHR_MONOTONIC_CLOCK_ID); + res = pthread_cond_init(&cond, &attr); + res = pthread_cond_timedwait(&cond, &mutex, &cond_timeout); + ]])],[pthread_cond_timedwait_monotonic=yes],[]) + AC_MSG_RESULT([$pthread_cond_timedwait_monotonic]) + if test $pthread_cond_timedwait_monotonic = yes; then + AC_DEFINE(ETHR_HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC, [1], [Define if pthread_cond_timedwait() can be used with a monotonic clock]) + fi + ]) + + linux_futex=no + AC_MSG_CHECKING([for Linux futexes]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #include <sys/syscall.h> + #include <unistd.h> + #include <linux/futex.h> + #include <sys/time.h> + ]], [[ + int i = 1; + syscall(__NR_futex, (void *) &i, FUTEX_WAKE, 1, + (void*)0,(void*)0, 0); + syscall(__NR_futex, (void *) &i, FUTEX_WAIT, 0, + (void*)0,(void*)0, 0); + return 0; + ]])],[linux_futex=yes],[]) + AC_MSG_RESULT([$linux_futex]) + test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.]) + + pthread_setname=no + AC_MSG_CHECKING([for pthread_setname_np]) + old_CFLAGS=$CFLAGS + CFLAGS="$CFLAGS -Werror" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define __USE_GNU + #include <pthread.h>]], [[pthread_setname_np(pthread_self(), "name");]])],[pthread_setname=linux],[]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define __USE_GNU + #include <pthread.h>]], [[pthread_set_name_np(pthread_self(), "name");]])],[pthread_setname=bsd],[]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define _DARWIN_C_SOURCE + #include <pthread.h>]], [[pthread_setname_np("name");]])],[pthread_setname=darwin],[]) + AC_MSG_RESULT([$pthread_setname]) + case $with_threadnames-$pthread_setname in + yes-linux) AC_DEFINE(ETHR_HAVE_PTHREAD_SETNAME_NP_2, 1, + [Define if you have linux style pthread_setname_np]);; + yes-bsd) AC_DEFINE(ETHR_HAVE_PTHREAD_SET_NAME_NP_2, 1, + [Define if you have bsd style pthread_set_name_np]);; + yes-darwin) AC_DEFINE(ETHR_HAVE_PTHREAD_SETNAME_NP_1, 1, + [Define if you have darwin style pthread_setname_np]);; + *) ;; + esac + + pthread_getname=no + AC_MSG_CHECKING([for pthread_getname_np]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define __USE_GNU + #define _DARWIN_C_SOURCE + #include <pthread.h>]], [[char buff[256]; pthread_getname_np(pthread_self(), buff, 256);]])],[pthread_getname=linux],[]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#define __USE_GNU + #define _DARWIN_C_SOURCE + #include <pthread.h>]], [[char buff[256]; pthread_getname_np(pthread_self(), buff);]])],[pthread_getname=ibm],[]) + AC_MSG_RESULT([$pthread_getname]) + case $pthread_getname in + linux) AC_DEFINE(ETHR_HAVE_PTHREAD_GETNAME_NP_3, 1, + [Define if you have linux style pthread_getname_np]);; + ibm) AC_DEFINE(ETHR_HAVE_PTHREAD_GETNAME_NP_2, 1, + [Define if you have ibm style pthread_getname_np]);; + *) ;; + esac + CFLAGS=$old_CFLAGS + + AS_IF( + [test "X$disable_native_ethr_impls" = "Xyes"], + [ + ethr_have_native_atomics=no + ], + [ + ETHR_CHK_GCC_ATOMIC_OPS([]) + + AC_MSG_CHECKING([for a usable libatomic_ops implementation]) + case "x$with_libatomic_ops" in + xno | xyes | x) + libatomic_ops_include= + ;; + *) + if test -d "${with_libatomic_ops}/include"; then + libatomic_ops_include="-I$with_libatomic_ops/include" + CPPFLAGS="$CPPFLAGS $libatomic_ops_include" + else + AC_MSG_ERROR([libatomic_ops include directory $with_libatomic_ops/include not found]) + fi;; + esac + ethr_have_libatomic_ops=no + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include "atomic_ops.h"]], [[ + volatile AO_t x; + AO_t y; + int z; + + AO_nop_full(); +#if defined(AO_HAVE_store) + AO_store(&x, (AO_t) 0); +#elif defined(AO_HAVE_store_release) + AO_store_release(&x, (AO_t) 0); +#else +#error No store +#endif +#if defined(AO_HAVE_load) + z = AO_load(&x); +#elif defined(AO_HAVE_load_acquire) + z = AO_load_acquire(&x); +#else +#error No load +#endif +#if defined(AO_HAVE_compare_and_swap_full) + z = AO_compare_and_swap_full(&x, (AO_t) 0, (AO_t) 1); +#elif defined(AO_HAVE_compare_and_swap_release) + z = AO_compare_and_swap_release(&x, (AO_t) 0, (AO_t) 1); +#elif defined(AO_HAVE_compare_and_swap_acquire) + z = AO_compare_and_swap_acquire(&x, (AO_t) 0, (AO_t) 1); +#elif defined(AO_HAVE_compare_and_swap) + z = AO_compare_and_swap(&x, (AO_t) 0, (AO_t) 1); +#else +#error No compare_and_swap +#endif + ]])],[ethr_have_native_atomics=yes + ethr_native_atomic_implementation=libatomic_ops + ethr_have_libatomic_ops=yes],[]) + AC_MSG_RESULT([$ethr_have_libatomic_ops]) + AS_IF( + [test $ethr_have_libatomic_ops = yes], + [ + AC_CHECK_SIZEOF(AO_t, , + [ + #include <stdio.h> + #include "atomic_ops.h" + ]) + AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used]) + + AC_DEFINE(ETHR_HAVE_LIBATOMIC_OPS, 1, [Define if you have libatomic_ops atomic operations]) + if test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then + AC_DEFINE(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS, 1, [Define if you prefer libatomic_ops native ethread implementations]) + fi + ETHR_DEFS="$ETHR_DEFS $libatomic_ops_include" + ], + [test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"], + [ + AC_MSG_ERROR([No usable libatomic_ops implementation found]) + ]) + + case "$host_cpu" in + sparc | sun4u | sparc64 | sun4v) + case "$with_sparc_memory_order" in + "TSO") + AC_DEFINE(ETHR_SPARC_TSO, 1, [Define if only run in Sparc TSO mode]);; + "PSO") + AC_DEFINE(ETHR_SPARC_PSO, 1, [Define if only run in Sparc PSO, or TSO mode]);; + "RMO"|"") + AC_DEFINE(ETHR_SPARC_RMO, 1, [Define if run in Sparc RMO, PSO, or TSO mode]);; + *) + AC_MSG_ERROR([Unsupported Sparc memory order: $with_sparc_memory_order]);; + esac + ethr_native_atomic_implementation=ethread + ethr_have_native_atomics=yes;; + i86pc | i*86 | x86_64 | amd64) + if test "$enable_x86_out_of_order" = "yes"; then + AC_DEFINE(ETHR_X86_OUT_OF_ORDER, 1, [Define if x86/x86_64 out of order instructions should be synchronized]) + fi + ethr_native_atomic_implementation=ethread + ethr_have_native_atomics=yes;; + macppc | ppc | powerpc | "Power Macintosh") + ethr_native_atomic_implementation=ethread + ethr_have_native_atomics=yes;; + tile) + ethr_native_atomic_implementation=ethread + ethr_have_native_atomics=yes;; + *) + ;; + esac + + ]) + + test ethr_have_native_atomics = "yes" && ethr_have_native_spinlock=yes + + dnl Restore LIBS + LIBS=$saved_libs + dnl restore CPPFLAGS + CPPFLAGS=$saved_cppflags + + ]) + +AC_MSG_CHECKING([whether default stack size should be modified]) +if test "x$ethr_modified_default_stack_size" != "x"; then + AC_DEFINE_UNQUOTED(ETHR_MODIFIED_DEFAULT_STACK_SIZE, $ethr_modified_default_stack_size, [Define if you want to modify the default stack size]) + AC_MSG_RESULT([yes; to $ethr_modified_default_stack_size kilo words]) +else + AC_MSG_RESULT([no]) +fi + +if test "x$ETHR_THR_LIB_BASE" != "x"; then + ETHR_DEFS="-DUSE_THREADS $ETHR_DEFS" + ETHR_LIBS="-l$ethr_lib_name -lerts_internal_r $ETHR_X_LIBS" + ETHR_LIB_NAME=$ethr_lib_name +fi + +AC_CHECK_SIZEOF(void *) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF_PTR, $ac_cv_sizeof_void_p, [Define to the size of pointers]) + +AC_CHECK_SIZEOF(int) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF_INT, $ac_cv_sizeof_int, [Define to the size of int]) +AC_CHECK_SIZEOF(long) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG, $ac_cv_sizeof_long, [Define to the size of long]) +AC_CHECK_SIZEOF(long long) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long, [Define to the size of long long]) +AC_CHECK_SIZEOF(__int64) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT64, $ac_cv_sizeof___int64, [Define to the size of __int64]) +AC_CHECK_SIZEOF(__int128_t) +AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT128_T, $ac_cv_sizeof___int128_t, [Define to the size of __int128_t]) + + +case X$erl_xcomp_bigendian in + X) ;; + Xyes|Xno) ac_cv_c_bigendian=$erl_xcomp_bigendian;; + *) AC_MSG_ERROR([Bad erl_xcomp_bigendian value: $erl_xcomp_bigendian]);; +esac + +AC_C_BIGENDIAN + +if test "$ac_cv_c_bigendian" = "yes"; then + AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian]) +fi + +case X$erl_xcomp_double_middle_endian in + X) ;; + Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;; + *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);; +esac + +AC_C_DOUBLE_MIDDLE_ENDIAN + +ETHR_X86_SSE2_ASM=no +AS_CASE( + ["$GCC-$ac_cv_sizeof_void_p-$host_cpu"], + [yes-4-i86pc | yes-4-i*86 | yes-4-x86_64 | yes-4-amd64], + [ + AC_MSG_CHECKING([for gcc sse2 asm support]) + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -msse2" + gcc_sse2_asm=no + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ + long long x, *y; + __asm__ __volatile__("movq %1, %0\n\t" : "=x"(x) : "m"(*y) : "memory"); + ]])],[gcc_sse2_asm=yes],[]) + CFLAGS="$save_CFLAGS" + AC_MSG_RESULT([$gcc_sse2_asm]) + if test "$gcc_sse2_asm" = "yes"; then + AC_DEFINE(ETHR_GCC_HAVE_SSE2_ASM_SUPPORT, 1, [Define if you use a gcc that supports -msse2 and understand sse2 specific asm statements]) + ETHR_X86_SSE2_ASM=yes + fi + ]) + +AS_CASE( + ["$GCC-$host_cpu"], + [yes-i86pc | yes-i*86 | yes-x86_64 | yes-amd64], + [ + if test $ac_cv_sizeof_void_p = 4; then + dw_cmpxchg="cmpxchg8b" + else + dw_cmpxchg="cmpxchg16b" + fi + + gcc_dw_cmpxchg_asm=no + gcc_pic_dw_cmpxchg_asm=no + gcc_cflags_pic=no + gcc_cmpxchg8b_pic_no_clobber_ebx=no + gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage=no + + save_CFLAGS="$CFLAGS" + + # Check if it works out of the box using passed CFLAGS + # and with -fPIC added to CFLAGS if the passed CFLAGS + # doesn't trigger position independent code + pic_cmpxchg=unknown + while true; do + + case $pic_cmpxchg in + yes) pic_text="pic ";; + *) pic_text="";; + esac + + AC_MSG_CHECKING([for gcc $pic_text$dw_cmpxchg plain asm support]) + + plain_cmpxchg=no + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ + char xchgd; + long new[2], xchg[2], *p; + __asm__ __volatile__( +#if ETHR_SIZEOF_PTR == 4 + "lock; cmpxchg8b %0\n\t" +#else + "lock; cmpxchg16b %0\n\t" +#endif + "setz %3\n\t" + : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=q"(xchgd) + : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "c"(new[1]), "b"(new[0]) + : "cc", "memory"); + ]])],[plain_cmpxchg=yes],[]) + + AC_MSG_RESULT([$plain_cmpxchg]) + + if test $pic_cmpxchg = yes; then + gcc_pic_dw_cmpxchg_asm=$plain_cmpxchg + break + fi + + gcc_dw_cmpxchg_asm=$plain_cmpxchg + + # If not already compiling to position independent + # code add -fPIC to CFLAGS and do it again. This + # since we want also want to know how to compile + # to position independent code since this might + # cause problems with the use of the EBX register + # as input to the asm on 32-bit x86 and old gcc + # compilers (gcc vsn < 5). + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +#if !defined(__PIC__) || !__PIC__ +# error no pic +#endif + ]])],[pic_cmpxchg=yes + gcc_cflags_pic=yes],[pic_cmpxchg=no]) + + if test $pic_cmpxchg = yes; then + gcc_pic_dw_cmpxchg_asm=$gcc_dw_cmpxchg_asm + break + fi + + CFLAGS="$save_CFLAGS -fPIC" + pic_cmpxchg=yes + + done + + AS_IF( + [test $gcc_pic_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4], + [ + + AC_MSG_CHECKING([for gcc pic cmpxchg8b asm support with EBX workaround]) + + # Check if we can work around it by managing the ebx + # register explicitly in the asm... + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ + char xchgd; + long new[2], xchg[2], *p; + __asm__ __volatile__( + "pushl %%ebx\n\t" + "movl %8, %%ebx\n\t" + "lock; cmpxchg8b %0\n\t" + "setz %3\n\t" + "popl %%ebx\n\t" + : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=q"(xchgd) + : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "c"(new[1]), "r"(new[0]) + : "cc", "memory"); + ]])],[gcc_pic_dw_cmpxchg_asm=yes + gcc_cmpxchg8b_pic_no_clobber_ebx=yes],[]) + + AC_MSG_RESULT([$gcc_pic_dw_cmpxchg_asm]) + + AS_IF( + [test $gcc_pic_dw_cmpxchg_asm = no], + [ + + AC_MSG_CHECKING([for gcc pic cmpxchg8b asm support with EBX and register shortage workarounds]) + # If no optimization is enabled we sometimes get a + # register shortage. Check if we can work around + # this... + + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ + char xchgd; + long new[2], xchg[2], *p; + __asm__ __volatile__( + "pushl %%ebx\n\t" + "movl (%7), %%ebx\n\t" + "movl 4(%7), %%ecx\n\t" + "lock; cmpxchg8b %0\n\t" + "setz %3\n\t" + "popl %%ebx\n\t" + : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd) + : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "r"(new) + : "cc", "memory"); + + ]])],[gcc_pic_dw_cmpxchg_asm=yes + gcc_cmpxchg8b_pic_no_clobber_ebx=yes + gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage=yes],[]) + + AC_MSG_RESULT([$gcc_pic_dw_cmpxchg_asm]) + ]) + + if test $gcc_cflags_pic = yes; then + gcc_dw_cmpxchg_asm=$gcc_pic_dw_cmpxchg_asm + fi + ]) + + CFLAGS="$save_CFLAGS" + + if test "$gcc_cmpxchg8b_pic_no_clobber_ebx" = "yes"; then + AC_DEFINE(ETHR_CMPXCHG8B_PIC_NO_CLOBBER_EBX, 1, [Define if gcc won't let you clobber ebx with cmpxchg8b and position independent code]) + fi + if test "$gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage" = "yes"; then + AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code]) + fi + if test "$gcc_dw_cmpxchg_asm" = "yes"; then + AC_DEFINE(ETHR_GCC_HAVE_DW_CMPXCHG_ASM_SUPPORT, 1, [Define if you use a gcc that supports the double word cmpxchg instruction]) + fi + ]) + +AC_DEFINE(ETHR_HAVE_ETHREAD_DEFINES, 1, \ +[Define if you have all ethread defines]) + +AC_SUBST(ETHR_X_LIBS) +AC_SUBST(ETHR_LIBS) +AC_SUBST(ETHR_LIB_NAME) +AC_SUBST(ETHR_DEFS) +AC_SUBST(ETHR_THR_LIB_BASE) +AC_SUBST(ETHR_THR_LIB_BASE_DIR) +AC_SUBST(ETHR_X86_SSE2_ASM) + +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl ERL_TIME_CORRECTION +dnl +dnl Check for primitives that can be used for implementing +dnl erts_os_monotonic_time() and erts_os_system_time() +dnl + +AC_DEFUN(ERL_TIME_CORRECTION, +[ + +AC_ARG_WITH(clock-resolution, +AS_HELP_STRING([--with-clock-resolution=high|low|default], + [specify wanted clock resolution])) + +AC_ARG_WITH(clock-gettime-realtime-id, +AS_HELP_STRING([--with-clock-gettime-realtime-id=CLOCKID], + [specify clock id to use with clock_gettime() for realtime time)])) + +AC_ARG_WITH(clock-gettime-monotonic-id, +AS_HELP_STRING([--with-clock-gettime-monotonic-id=CLOCKID], + [specify clock id to use with clock_gettime() for monotonic time)])) + +AC_ARG_ENABLE(prefer-elapsed-monotonic-time-during-suspend, +AS_HELP_STRING([--enable-prefer-elapsed-monotonic-time-during-suspend], + [Prefer an OS monotonic time source with elapsed time during suspend]) +AS_HELP_STRING([--disable-prefer-elapsed-monotonic-time-during-suspend], + [Do not prefer an OS monotonic time source with elapsed time during suspend]), +[ case "$enableval" in + yes) prefer_elapsed_monotonic_time_during_suspend=yes ;; + *) prefer_elapsed_monotonic_time_during_suspend=no ;; + esac ], prefer_elapsed_monotonic_time_during_suspend=no) + +AC_ARG_ENABLE(gettimeofday-as-os-system-time, + AS_HELP_STRING([--enable-gettimeofday-as-os-system-time], + [Force usage of gettimeofday() for OS system time]), +[ case "$enableval" in + yes) force_gettimeofday_os_system_time=yes ;; + *) force_gettimeofday_os_system_time=no ;; + esac ], force_gettimeofday_os_system_time=no) + +case "$with_clock_resolution" in + ""|no|yes) + with_clock_resolution=default;; + high|low|default) + ;; + *) + AC_MSG_ERROR([Invalid wanted clock resolution: $with_clock_resolution]) + ;; +esac + +AS_IF( + [test "$force_gettimeofday_os_system_time" = "yes"], + [ + + AC_CHECK_FUNCS([gettimeofday]) + if test "$ac_cv_func_gettimeofday" = "yes"; then + AC_DEFINE(OS_SYSTEM_TIME_GETTIMEOFDAY, [1], [Define if you want to implement erts_os_system_time() using gettimeofday()]) + else + AC_MSG_ERROR([No gettimeofday() available]) + fi + ], + [ + # $force_gettimeofday_os_system_time != yes + +case "$with_clock_gettime_realtime_id" in + ""|no) + with_clock_gettime_realtime_id=no + ;; + CLOCK_*CPUTIME*) + AC_MSG_ERROR([Invalid clock_gettime() realtime clock id: Refusing to use the cputime clock id $with_clock_gettime_realtime_id as realtime clock id]) + ;; + CLOCK_MONOTONIC*|CLOCK_BOOTTIME*|CLOCK_UPTIME*|CLOCK_HIGHRES*) + AC_MSG_ERROR([Invalid clock_gettime() realtime clock id: Refusing to use the monotonic clock id $with_clock_gettime_realtime_id as realtime clock id]) + ;; + CLOCK_*) + ;; + *) + AC_MSG_ERROR([Invalid clock_gettime() clock id: $with_clock_gettime_realtime_id]) + ;; +esac + +AS_CASE(["$with_clock_resolution-$with_clock_gettime_realtime_id"], + [high-no], + [ + ERL_WALL_CLOCK([high_resolution]) + ], + [low-no], + [ + ERL_WALL_CLOCK([low_resolution]) + ], + [default-no], + [ + ERL_WALL_CLOCK([default_resolution]) + ], + [ + ERL_WALL_CLOCK([custom_resolution], [$with_clock_gettime_realtime_id]) + ]) + +case "$erl_wall_clock_func-$erl_wall_clock_id-$with_clock_gettime_realtime_id" in + *-*-no) + ;; + clock_gettime-$with_clock_gettime_realtime_id-$with_clock_gettime_realtime_id) + ;; + *) + AC_MSG_ERROR([$with_clock_gettime_realtime_id as clock id to clock_gettime() doesn't compile]) + ;; +esac + +case $erl_wall_clock_func in + none) + AC_MSG_ERROR([No wall clock source found]) + ;; + mach_clock_get_time) + AC_DEFINE(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_system_time() using mach clock_get_time()]) + ;; + clock_gettime) + AC_DEFINE(OS_SYSTEM_TIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_system_time() using clock_gettime()]) + ;; + gettimeofday) + AC_DEFINE(OS_SYSTEM_TIME_GETTIMEOFDAY, [1], [Define if you want to implement erts_os_system_time() using gettimeofday()]) + ;; + *) + ;; +esac + +if test "x$erl_wall_clock_id" != "x"; then + AC_DEFINE_UNQUOTED(WALL_CLOCK_ID_STR, ["$erl_wall_clock_id"], [Define as a string of wall clock id to use]) + AC_DEFINE_UNQUOTED(WALL_CLOCK_ID, [$erl_wall_clock_id], [Define to wall clock id to use]) +fi + + ]) # $force_gettimeofday_os_system_time != yes + +case "$with_clock_gettime_monotonic_id" in + ""|no) + with_clock_gettime_monotonic_id=no + ;; + CLOCK_*CPUTIME*) + AC_MSG_ERROR([Invalid clock_gettime() monotonic clock id: Refusing to use the cputime clock id $with_clock_gettime_monotonic_id as monotonic clock id]) + ;; + CLOCK_REALTIME*|CLOCK_TAI*) + AC_MSG_ERROR([Invalid clock_gettime() monotonic clock id: Refusing to use the realtime clock id $with_clock_gettime_monotonic_id as monotonic clock id]) + ;; + CLOCK_MONOTONIC) + case $host_os in + darwin*) + # CLOCK_MONOTONIC is buggy on MacOS (darwin), or at least on Big Sur + # and Monterey, since it may step backwards. + AC_MSG_ERROR([Invalid clock_gettime() monotonic clock id: Refusing to use $with_clock_gettime_monotonic_id as monotonic clock id since it is buggy on MacOS]);; + *) + ;; + esac;; + CLOCK_*) + ;; + *) + AC_MSG_ERROR([Invalid clock_gettime() clock id: $with_clock_gettime_monotonic_id]) + ;; +esac + +AS_CASE(["$with_clock_resolution-$with_clock_gettime_monotonic_id"], + [high-no], + [ + ERL_MONOTONIC_CLOCK([high_resolution], [undefined], [$prefer_elapsed_monotonic_time_during_suspend]) + ], + [low-no], + [ + ERL_MONOTONIC_CLOCK([low_resolution], [undefined], [$prefer_elapsed_monotonic_time_during_suspend]) + ], + [default-no], + [ + ERL_MONOTONIC_CLOCK([default_resolution], [undefined], [$prefer_elapsed_monotonic_time_during_suspend]) + ], + [ + ERL_MONOTONIC_CLOCK([custom_resolution], [$with_clock_gettime_monotonic_id], [$prefer_elapsed_monotonic_time_during_suspend]) + ]) + +case "$erl_monotonic_clock_func-$erl_monotonic_clock_id-$with_clock_gettime_monotonic_id" in + *-*-no) + ;; + clock_gettime-$with_clock_gettime_monotonic_id-$with_clock_gettime_monotonic_id) + ;; + *) + AC_MSG_ERROR([$with_clock_gettime_monotonic_id as clock id to clock_gettime() doesn't compile]) + ;; +esac + +case $erl_monotonic_clock_func in + times) + AC_DEFINE(OS_MONOTONIC_TIME_USING_TIMES, [1], [Define if you want to implement erts_os_monotonic_time() using times()]) + ;; + mach_clock_get_time) + AC_DEFINE(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_monotonic_time() using mach clock_get_time()]) + ;; + clock_gettime) + AC_DEFINE(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_monotonic_time() using clock_gettime()]) + ;; + gethrtime) + AC_DEFINE(OS_MONOTONIC_TIME_USING_GETHRTIME, [1], [Define if you want to implement erts_os_monotonic_time() using gethrtime()]) + ;; + *) + ;; +esac + +if test $erl_corrected_monotonic_clock = yes; then + AC_DEFINE(ERTS_HAVE_CORRECTED_OS_MONOTONIC_TIME, [1], [Define if OS monotonic clock is corrected]) +fi + +if test $erl_monotonic_clock_low_resolution = yes; then + AC_DEFINE(ERTS_HAVE_LOW_RESOLUTION_OS_MONOTONIC_LOW, [1], [Define if you have a low resolution OS monotonic clock]) +fi + +xrtlib= +if test "$erl_monotonic_clock_lib" != ""; then + xrtlib="$erl_monotonic_clock_lib" +fi +if test "$erl_wall_clock_lib" != ""; then + xrtlib="$erl_wall_clock_lib" +fi +if test "x$erl_monotonic_clock_id" != "x"; then + AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID_STR, ["$erl_monotonic_clock_id"], [Define as a string of monotonic clock id to use]) + AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID, [$erl_monotonic_clock_id], [Define to monotonic clock id to use]) +fi + +if test $erl_cv_clock_gettime_monotonic_raw = yes; then + AC_DEFINE(HAVE_CLOCK_GETTIME_MONOTONIC_RAW, [1], [Define if you have clock_gettime(CLOCK_MONOTONIC_RAW, _)]) +fi + +ERL_MONOTONIC_CLOCK([high_resolution], [undefined], [no]) + +case $erl_monotonic_clock_low_resolution-$erl_monotonic_clock_func in + no-mach_clock_get_time) + monotonic_hrtime=yes + AC_DEFINE(SYS_HRTIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_hrtime() using mach clock_get_time()]) + ;; + no-clock_gettime) + monotonic_hrtime=yes + AC_DEFINE(SYS_HRTIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_hrtime() using clock_gettime()]) + ;; + no-gethrtime) + monotonic_hrtime=yes + AC_DEFINE(SYS_HRTIME_USING_GETHRTIME, [1], [Define if you want to implement erts_os_hrtime() using gethrtime()]) + ;; + *) + monotonic_hrtime=no + ;; +esac + +if test $monotonic_hrtime = yes; then + AC_DEFINE(HAVE_MONOTONIC_ERTS_SYS_HRTIME, [1], [Define if you have a monotonic erts_os_hrtime() implementation]) +fi + +if test "x$erl_monotonic_clock_id" != "x"; then + AC_DEFINE_UNQUOTED(HRTIME_CLOCK_ID_STR, ["$erl_monotonic_clock_id"], [Define as a string of monotonic clock id to use]) + AC_DEFINE_UNQUOTED(HRTIME_CLOCK_ID, [$erl_monotonic_clock_id], [Define to monotonic clock id to use]) +fi + + +dnl +dnl Check if gethrvtime is working, and if to use procfs ioctl +dnl or (yet to be written) write to the procfs ctl file. +dnl + +AC_MSG_CHECKING([if gethrvtime works and how to use it]) +AC_RUN_IFELSE([AC_LANG_SOURCE([[ +/* gethrvtime procfs ioctl test */ +/* These need to be undef:ed to not break activation of + * micro level process accounting on /proc/self + */ +#ifdef _LARGEFILE_SOURCE +# undef _LARGEFILE_SOURCE +#endif +#ifdef _FILE_OFFSET_BITS +# undef _FILE_OFFSET_BITS +#endif +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/signal.h> +#include <sys/fault.h> +#include <sys/syscall.h> +#include <sys/procfs.h> +#include <fcntl.h> + +int main() { + long msacct = PR_MSACCT; + int fd; + long long start, stop; + int i; + pid_t pid = getpid(); + char proc_self[30] = "/proc/"; + + sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid); + if ( (fd = open(proc_self, O_WRONLY)) == -1) + exit(1); + if (ioctl(fd, PIOCSET, &msacct) < 0) + exit(2); + if (close(fd) < 0) + exit(3); + start = gethrvtime(); + for (i = 0; i < 100; i++) + stop = gethrvtime(); + if (start == 0) + exit(4); + if (start == stop) + exit(5); + exit(0); return 0; +} +]])],[erl_gethrvtime=procfs_ioctl],[erl_gethrvtime=false],[ +case X$erl_xcomp_gethrvtime_procfs_ioctl in + X) + erl_gethrvtime=cross;; + Xyes|Xno) + if test $erl_xcomp_gethrvtime_procfs_ioctl = yes; then + erl_gethrvtime=procfs_ioctl + else + erl_gethrvtime=false + fi;; + *) + AC_MSG_ERROR([Bad erl_xcomp_gethrvtime_procfs_ioctl value: $erl_xcomp_gethrvtime_procfs_ioctl]);; +esac +]) + +LIBRT=$xrtlib +AS_IF([test "$erl_gethrvtime" = "procfs_ioctl"], + [ + AC_DEFINE(HAVE_GETHRVTIME_PROCFS_IOCTL,[1], + [define if gethrvtime() works and uses ioctl() to /proc/self]) + AC_MSG_RESULT(uses ioctl to procfs) + ], + [ + if test $erl_gethrvtime = cross; then + erl_gethrvtime=false + AC_MSG_RESULT(cross) + AC_MSG_WARN([result 'not working' guessed because of cross compilation]) + else + AC_MSG_RESULT(not working) + fi + + dnl + dnl Check if clock_gettime (linux) is working + dnl + + AC_MSG_CHECKING([if clock_gettime can be used to get thread CPU time]) + save_libs=$LIBS + LIBS="-lrt" + AC_RUN_IFELSE([AC_LANG_SOURCE([[ + #include <stdlib.h> + #include <unistd.h> + #include <string.h> + #include <stdio.h> + #include <time.h> + int main() { + long long start, stop; + int i; + struct timespec tp; + + if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp) < 0) + exit(1); + start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; + for (i = 0; i < 100; i++) + clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp); + stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; + if (start == 0) + exit(4); + if (start == stop) + exit(5); + exit(0); return 0; + } + ]])],[erl_clock_gettime_cpu_time=yes],[erl_clock_gettime_cpu_time=no],[ + case X$erl_xcomp_clock_gettime_cpu_time in + X) erl_clock_gettime_cpu_time=cross;; + Xyes|Xno) erl_clock_gettime_cpu_time=$erl_xcomp_clock_gettime_cpu_time;; + *) AC_MSG_ERROR([Bad erl_xcomp_clock_gettime_cpu_time value: $erl_xcomp_clock_gettime_cpu_time]);; + esac + ]) + LIBS=$save_libs + AC_MSG_RESULT($erl_clock_gettime_cpu_time) + case $erl_clock_gettime_cpu_time in + yes) + AC_DEFINE(HAVE_CLOCK_GETTIME_CPU_TIME,[], + [define if clock_gettime() works for getting thread time]) + LIBRT=-lrt + ;; + cross) + erl_clock_gettime_cpu_time=no + AC_MSG_WARN([result no guessed because of cross compilation]) + ;; + *) + ;; + esac + ]) +AC_SUBST(LIBRT) +])dnl + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_TRY_ENABLE_CFLAG +dnl +dnl +dnl Tries a CFLAG and sees if it can be enabled without compiler errors +dnl $1: textual cflag to add +dnl $2: variable to store the modified CFLAG in +dnl Usage example LM_TRY_ENABLE_CFLAG([-Werror=return-type], [CFLAGS]) +dnl +dnl +AC_DEFUN([LM_TRY_ENABLE_CFLAG], [ + AC_MSG_CHECKING([if we can add $1 to $2 (via CFLAGS)]) + saved_CFLAGS=$CFLAGS; + CFLAGS="$1 $$2"; + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0;]])],[can_enable_flag=true],[can_enable_flag=false]) + CFLAGS=$saved_CFLAGS; + AS_IF( + [test "X$can_enable_flag" = "Xtrue"], + [ + AC_MSG_RESULT([yes]) + AS_VAR_SET($2, "$1 $$2") + ], + [ + AC_MSG_RESULT([no]) + ]) +]) + +AC_DEFUN([LM_CHECK_ENABLE_CFLAG], [ + AC_MSG_CHECKING([whether $CC accepts $1...]) + saved_CFLAGS=$CFLAGS; + CFLAGS="$1 $CFLAGS"; + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[return 0;]])],[can_enable_flag=true],[can_enable_flag=false]) + CFLAGS=$saved_CFLAGS; + AS_IF( + [test "X$can_enable_flag" = "Xtrue"], + [ + AS_VAR_SET($2, true) + AC_MSG_RESULT([yes]) + ], + [ + AS_VAR_SET($2, false) + AC_MSG_RESULT([no]) + ]) +]) + +dnl +dnl LM_CHECK_RUN_CFLAG +dnl +dnl As LM_CHECK_ENABLE_CFLAG but also runs the command. Required for testing +dnl profile-guided optimization, for which the "use" step may require that the +dnl binary created in the "generate" step runs. +dnl +AC_DEFUN([LM_CHECK_RUN_CFLAG], [ + AC_MSG_CHECKING([whether $CC accepts $1...]) + saved_CFLAGS=$CFLAGS; + CFLAGS="$1 $CFLAGS"; + AC_RUN_IFELSE([AC_LANG_SOURCE([[]])],[return 0;],[can_enable_flag=true],[can_enable_flag=false]) + CFLAGS=$saved_CFLAGS; + AS_IF( + [test "X$can_enable_flag" = "Xtrue"], + [ + AS_VAR_SET($2, true) + AC_MSG_RESULT([yes]) + ], + [ + AS_VAR_SET($2, false) + AC_MSG_RESULT([no]) + ]) +]) + +dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY +dnl [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]]) +dnl Freely inspired by AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[],[]). (Maybe better to create a +dnl AC_LANG_JAVA instead...) +AC_DEFUN(ERL_TRY_LINK_JAVA, +[java_link='$JAVAC conftest.java 1>&AS_MESSAGE_LOG_FD' +changequote(, )dnl +cat > conftest.java <<EOF +$1 +class conftest { public static void main(String[] args) { + $2 + ; return; }} +EOF +changequote([, ])dnl +AS_IF( + [AC_TRY_EVAL(java_link) && test -s conftest.class], + [ + ifelse([$3], , :, [rm -rf conftest* + $3]) + + ], + [ + echo "configure: failed program was:" 1>&AS_MESSAGE_LOG_FD + cat conftest.java 1>&AS_MESSAGE_LOG_FD + echo "configure: PATH was $PATH" 1>&AS_MESSAGE_LOG_FD +ifelse([$4], , , [ rm -rf conftest* + $4 +])dnl + + ]) +rm -f conftest*]) +dnl #define UNSAFE_MASK 0xc0000000 /* Mask for bits that must be constant */ + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_HARDWARE_ARCH +dnl +dnl Determine target hardware in ARCH +dnl +AC_DEFUN([LM_HARDWARE_ARCH], [ + AC_MSG_CHECKING([target hardware architecture]) + if test "x$host_alias" != "x" -a "x$host_cpu" != "x"; then + chk_arch_=$host_cpu + else + chk_arch_=`uname -m` + fi + + case $chk_arch_ in + sun4u) ARCH=ultrasparc;; + sparc64) ARCH=sparc64;; + sun4v) ARCH=ultrasparc;; + i86pc) ARCH=x86;; + i386) ARCH=x86;; + i486) ARCH=x86;; + i586) ARCH=x86;; + i686) ARCH=x86;; + x86_64) ARCH=amd64;; + amd64) ARCH=amd64;; + macppc) ARCH=ppc;; + powerpc) ARCH=ppc;; + ppc) ARCH=ppc;; + ppc64) ARCH=ppc64;; + ppc64le) ARCH=ppc64le;; + powerpc64) ARCH=ppc64;; + powerpc64le) ARCH=ppc64le;; + "Power Macintosh") ARCH=ppc;; + arm64) ARCH=arm64;; + armv5b) ARCH=arm;; + armv5teb) ARCH=arm;; + armv5tel) ARCH=arm;; + armv5tejl) ARCH=arm;; + armv6l) ARCH=arm;; + armv6hl) ARCH=arm;; + armv7l) ARCH=arm;; + armv7hl) ARCH=arm;; + armv8*) ARCH=arm;; + aarch64) ARCH=arm64;; + aarch*) ARCH=arm;; + tile) ARCH=tile;; + e2k) ARCH=e2k;; + *) ARCH=noarch;; + esac + AC_MSG_RESULT($ARCH) + + dnl + dnl Convert between x86 and amd64 based on the compiler's mode. + dnl Ditto between ultrasparc and sparc64. + dnl + AC_MSG_CHECKING(whether compilation mode forces ARCH adjustment) + case "$ARCH-$ac_cv_sizeof_void_p" in + x86-8) + AC_MSG_RESULT(yes: adjusting ARCH=x86 to ARCH=amd64) + ARCH=amd64 + ;; + amd64-4) + AC_MSG_RESULT(yes: adjusting ARCH=amd64 to ARCH=x86) + ARCH=x86 + ;; + ultrasparc-8) + AC_MSG_RESULT(yes: adjusting ARCH=ultrasparc to ARCH=sparc64) + ARCH=sparc64 + ;; + sparc64-4) + AC_MSG_RESULT(yes: adjusting ARCH=sparc64 to ARCH=ultrasparc) + ARCH=ultrasparc + ;; + ppc64-4) + AC_MSG_RESULT(yes: adjusting ARCH=ppc64 to ARCH=ppc) + ARCH=ppc + ;; + ppc-8) + AC_MSG_RESULT(yes: adjusting ARCH=ppc to ARCH=ppc64) + ARCH=ppc64 + ;; + arm-8) + AC_MSG_RESULT(yes: adjusting ARCH=arm to ARCH=arm64) + ARCH=arm64 + ;; + *) + AC_MSG_RESULT(no: ARCH is $ARCH) + ;; + esac + + AC_SUBST(ARCH) +]) + +dnl +dnl-------------------------------------------------------------------- +dnl Dynamic Erlang Drivers +dnl +dnl Linking to produce dynamic Erlang drivers to be loaded by Erlang's +dnl Dynamic Driver Loader and Linker (DDLL). Below the prefix DED is an +dnl abbreviation for `Dynamic Erlang Driver'. +dnl +dnl For DED we need something quite sloppy, which allows undefined references +dnl (notably driver functions) in the resulting shared library. +dnl Example of Makefile rule (and settings of macros): +dnl +dnl LIBS = @LIBS@ +dnl LD = @DED_LD@ +dnl LDFLAGS = @DED_LDFLAGS@ +dnl soname = @ldsoname@ +dnl +dnl my_drv.so: my_drv.o my_utils.o +dnl $(LD) $(LDFLAGS) $(soname) $@ -o $@ $^ -lc $(LIBS) +dnl +dnl-------------------------------------------------------------------- +dnl + +AC_DEFUN(ERL_DED, + [ + +LM_CHECK_THR_LIB + +if test "$THR_DEFS" = ""; then + DED_THR_DEFS="-D_THREAD_SAFE -D_REENTRANT" +else + DED_THR_DEFS="$THR_DEFS" +fi + +AC_SUBST(DED_THR_DEFS) + +ERL_DED_FLAGS + +]) + +AC_DEFUN(ERL_DED_FLAGS, + [ + +USER_LD=$LD +USER_LDFLAGS="$LDFLAGS" + +DED_CC=$CC +DED_GCC=$GCC + +DED_CFLAGS= +DED_OSTYPE=unix +case $host_os in + linux*) + DED_CFLAGS="-D_GNU_SOURCE" ;; + win32) + DED_CFLAGS="-D_WIN32_WINNT=0x0600 -DWINVER=0x0600" + DED_OSTYPE=win32 ;; + *) + ;; +esac + +DED_WARN_FLAGS="-Wall -Wstrict-prototypes" +case "$host_cpu" in + tile*) + # tile-gcc is a bit stricter with -Wmissing-prototypes than other gccs, + # and too strict for our taste. + ;; + *) + DED_WARN_FLAGS="$DED_WARN_FLAGS -Wmissing-prototypes";; +esac + +LM_TRY_ENABLE_CFLAG([-Wdeclaration-after-statement], [DED_WARN_FLAGS]) + +LM_TRY_ENABLE_CFLAG([-Werror=return-type], [DED_WERRORFLAGS]) +LM_TRY_ENABLE_CFLAG([-Werror=implicit], [DED_WERRORFLAGS]) +LM_TRY_ENABLE_CFLAG([-Werror=undef], [DED_WERRORFLAGS]) + +DED_SYS_INCLUDE="-I${ERL_TOP}/erts/emulator/beam -I${ERL_TOP}/erts/include -I${ERL_TOP}/erts/include/$host -I${ERL_TOP}/erts/include/internal -I${ERL_TOP}/erts/include/internal/$host -I${ERL_TOP}/erts/emulator/sys/$DED_OSTYPE -I${ERL_TOP}/erts/emulator/sys/common" +DED_INCLUDE=$DED_SYS_INCLUDE + +DED_CFLAGS="$CFLAGS $CPPFLAGS $DED_CFLAGS" +AS_IF( + [test "x$GCC" = xyes], + [ + # Use -fno-common for gcc, that is link error if multiple definitions of + # global variables are encountered. This is ISO C compliant. + # Until version 10, gcc has had -fcommon as default, which allows and merges + # such dubious duplicates. + LM_TRY_ENABLE_CFLAG([-fno-common], [DED_CFLAGS]) + + LM_TRY_ENABLE_CFLAG([-fno-strict-aliasing], [DED_CFLAGS]) + + DED_STATIC_CFLAGS="$DED_CFLAGS" + DED_CFLAGS="$DED_CFLAGS -fPIC" + # Remove -fPIE and -fno-PIE + DED_CFLAGS=`echo $DED_CFLAGS | sed 's/-f\(no-\)\?PIE//g'` + ]) + +DED_EXT=so +case $host_os in + win32) DED_EXT=dll;; + darwin*) + DED_CFLAGS="$DED_CFLAGS -fno-common" + DED_STATIC_CFLAGS="$DED_STATIC_CFLAGS -fno-common";; + *) + ;; +esac + +DED_STATIC_CFLAGS="$DED_STATIC_CFLAGS -DSTATIC_ERLANG_NIF -DSTATIC_ERLANG_DRIVER" + +if test "$CFLAG_RUNTIME_LIBRARY_PATH" = ""; then + + CFLAG_RUNTIME_LIBRARY_PATH="-Wl,-R" + case $host_os in + darwin*) + CFLAG_RUNTIME_LIBRARY_PATH= + ;; + win32) + CFLAG_RUNTIME_LIBRARY_PATH= + ;; + osf*) + CFLAG_RUNTIME_LIBRARY_PATH="-Wl,-rpath," + ;; + *) + ;; + esac + +fi + +# If DED_LD is set in environment, we expect all DED_LD* variables +# to be specified (cross compiling) +if test "x$DED_LD" = "x"; then + +DED_LDFLAGS_CONFTEST= + +DED_LD_FLAG_RUNTIME_LIBRARY_PATH="-R" +case $host_os in + win32) + DED_LD="ld.sh" + DED_LDFLAGS="-dll" + DED_LD_FLAG_RUNTIME_LIBRARY_PATH= + ;; + solaris2*|sysv4*) + DED_LDFLAGS="-G" + if test X${enable_m64_build} = Xyes; then + DED_LDFLAGS="-64 $DED_LDFLAGS" + fi + ;; + aix*|os400*) + DED_LDFLAGS="-G -bnoentry -bexpall" + ;; + freebsd2*) + # Non-ELF GNU linker + DED_LDFLAGS="-Bshareable" + ;; + darwin*) + # Mach-O linker: a shared lib and a loadable object file is not the same thing. + + if test "X${ERL_DED_FLAT_BUNDLE}" = "Xtrue"; then + # EI sets this variable when building its .so file as beam.smp + # has not been built yet and any ei lib will not + # link to beam.smp anyways + DED_LDFLAGS="-bundle -flat_namespace -undefined suppress" + else + # Cannot use flat namespaces for drivers/nifs as that may cause + # symbols to collide during loading + DED_LDFLAGS="-bundle -bundle_loader ${ERL_TOP}/bin/$host/beam.smp" + fi + # DED_LDFLAGS_CONFTEST is for use in configure tests only. We + # cannot use DED_LDFLAGS in configure tests since beam.smp has not + # been built yet... + DED_LDFLAGS_CONFTEST="-bundle" + if test X${enable_m64_build} = Xyes; then + DED_LDFLAGS="-m64 $DED_LDFLAGS" + else + if test X${enable_m32_build} = Xyes; then + DED_LDFLAGS="-m32 $DED_LDFLAGS" + else + AC_CHECK_SIZEOF(void *) + case "$ac_cv_sizeof_void_p" in + 8) + DED_LDFLAGS="-m64 $DED_LDFLAGS";; + *) + ;; + esac + fi + fi + DED_LD="$CC" + DED_LD_FLAG_RUNTIME_LIBRARY_PATH="$CFLAG_RUNTIME_LIBRARY_PATH" + ;; + linux*) + DED_LD="$CC" + DED_LD_FLAG_RUNTIME_LIBRARY_PATH="$CFLAG_RUNTIME_LIBRARY_PATH" + DED_LDFLAGS="-shared -Wl,-Bsymbolic" + if test X${enable_m64_build} = Xyes; then + DED_LDFLAGS="-m64 $DED_LDFLAGS" + fi; + if test X${enable_m32_build} = Xyes; then + DED_LDFLAGS="-m32 $DED_LDFLAGS" + fi + ;; + freebsd*) + DED_LD="$CC" + DED_LD_FLAG_RUNTIME_LIBRARY_PATH="$CFLAG_RUNTIME_LIBRARY_PATH" + DED_LDFLAGS="-shared" + if test X${enable_m64_build} = Xyes; then + DED_LDFLAGS="-m64 $DED_LDFLAGS" + fi; + if test X${enable_m32_build} = Xyes; then + DED_LDFLAGS="-m32 $DED_LDFLAGS" + fi + ;; + openbsd*) + DED_LD="$CC" + DED_LD_FLAG_RUNTIME_LIBRARY_PATH="$CFLAG_RUNTIME_LIBRARY_PATH" + DED_LDFLAGS="-shared" + ;; + osf*) + # NOTE! Whitespace after -rpath is important. + DED_LD_FLAG_RUNTIME_LIBRARY_PATH="-rpath " + DED_LDFLAGS="-shared -expect_unresolved '*'" + ;; + *) + # assume GNU linker and ELF + DED_LDFLAGS="-shared" + # GNU linker has no option for 64bit build, should not propagate -m64 + ;; +esac + +if test "$DED_LD" = "" && test "$USER_LD" != ""; then + DED_LD="$USER_LD" + DED_LDFLAGS="$USER_LDFLAGS $DED_LDFLAGS" +fi + +DED_LIBS=$LIBS + +fi # "x$DED_LD" = "x" + +test "$DED_LDFLAGS_CONFTEST" != "" || DED_LDFLAGS_CONFTEST="$DED_LDFLAGS" + +AC_CHECK_TOOL(DED_LD, ld, false) +test "$DED_LD" != "false" || AC_MSG_ERROR([No linker found]) + +AC_MSG_CHECKING(for static compiler flags) +DED_STATIC_CFLAGS="$DED_WERRORFLAGS $DED_WFLAGS $DED_THR_DEFS $DED_STATIC_CFLAGS" +AC_MSG_RESULT([$DED_STATIC_CFLAGS]) +AC_MSG_CHECKING(for basic compiler flags for loadable drivers) +DED_BASIC_CFLAGS=$DED_CFLAGS +AC_MSG_RESULT([$DED_CFLAGS]) +AC_MSG_CHECKING(for compiler flags for loadable drivers) +DED_CFLAGS="$DED_WERRORFLAGS $DED_WARN_FLAGS $DED_THR_DEFS $DED_CFLAGS" +AC_MSG_RESULT([$DED_CFLAGS]) +AC_MSG_CHECKING(for linker for loadable drivers) +AC_MSG_RESULT([$DED_LD]) +AC_MSG_CHECKING(for linker flags for loadable drivers) +AC_MSG_RESULT([$DED_LDFLAGS]) +AC_MSG_CHECKING(for 'runtime library path' linker flag) +if test "x$DED_LD_FLAG_RUNTIME_LIBRARY_PATH" != "x"; then + AC_MSG_RESULT([$DED_LD_FLAG_RUNTIME_LIBRARY_PATH]) +else + AC_MSG_RESULT([not found]) +fi + +AC_SUBST(DED_CC) +AC_SUBST(DED_GCC) +AC_SUBST(DED_EXT) +AC_SUBST(DED_SYS_INCLUDE) +AC_SUBST(DED_INCLUDE) +AC_SUBST(DED_BASIC_CFLAGS) +AC_SUBST(DED_CFLAGS) +AC_SUBST(DED_STATIC_CFLAGS) +AC_SUBST(DED_WARN_FLAGS) +AC_SUBST(DED_WERRORFLAGS) +AC_SUBST(DED_LD) +AC_SUBST(DED_LDFLAGS) +AC_SUBST(DED_LD_FLAG_RUNTIME_LIBRARY_PATH) +AC_SUBST(DED_LIBS) +AC_SUBST(DED_OSTYPE) + +]) |