# Copyright (c) 1999-2001 by Red Hat, Inc. All rights reserved. # Copyright (c) 2005-2009 Hewlett-Packard Development Company, L.P. # Copyright (c) 2009-2018 Ivan Maidanski # # THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED # OR IMPLIED. ANY USE IS AT YOUR OWN RISK. # # Permission is hereby granted to use or copy this program # for any purpose, provided the above notices are retained on all copies. # Permission to modify the code and to distribute modified code is granted, # provided the above notices are retained, and a notice that the code was # modified is included with the above copyright notice. dnl Process this file with autoconf to produce configure. dnl Initialization. AC_INIT(gc,8.0.4,https://github.com/ivmai/bdwgc/issues) dnl Version must conform to: [0-9]+[.][0-9]+[.][0-9]+ AC_CONFIG_SRCDIR(gcj_mlc.c) AC_CONFIG_MACRO_DIR([m4]) AC_CANONICAL_TARGET AC_PREREQ(2.61) GC_SET_VERSION AM_INIT_AUTOMAKE([foreign nostdinc subdir-objects]) AC_CONFIG_HEADERS([include/config.h]) AM_MAINTAINER_MODE AC_SUBST(PACKAGE) AC_SUBST(GC_VERSION) AM_PROG_CC_C_O AC_PROG_CXX AM_PROG_AS AC_PROG_INSTALL LT_INIT([disable-static]) # Only the shared libraries are produced by default, use "--enable-static" # option to override it. dnl Note: If Autoconf reports that LIBTOOL (or AC_ENABLE_SHARED, or dnl AC_PROG_LIBTOOL) is undefined, Libtool installation should be checked. # Special CFLAGS to use when building gc_cflags="" # gc_use_mmap Set to "yes" on platforms where mmap should be used instead # of sbrk. This will define USE_MMAP. gc_use_mmap="" # We should set -fexceptions if we are using gcc and might be used # inside something like gcj. This is the zeroth approximation: if test :"$GCC": = :yes: ; then gc_cflags="${gc_cflags} -fexceptions" else case "$host" in hppa*-*-hpux* ) if test :$GCC: != :"yes": ; then gc_cflags="${gc_flags} +ESdbgasm" fi # :TODO: actually we should check using Autoconf if # the compiler supports this option. ;; esac fi case "${host}" in *-linux*) # FIXME: This seems to be no longer needed as configured in gcconfig.h #gc_use_mmap=yes ;; esac # target_optspace --enable-target-optspace ("yes", "no", "") case "${target_optspace}:${host}" in yes:*) gc_cflags="${gc_cflags} -Os" ;; :m32r-* | :d10v-* | :d30v-*) gc_cflags="${gc_cflags} -Os" ;; no:* | :*) # Nothing. ;; esac # Set any host dependent compiler flags. case "${host}" in mips-tx39-*|mipstx39-unknown-*) gc_cflags="${gc_cflags} -G 0" ;; *) ;; esac GC_CFLAGS=${gc_cflags} AC_SUBST(GC_CFLAGS) dnl Extra user-defined flags to pass both to C and C++ compilers. AC_SUBST([CFLAGS_EXTRA]) AC_ARG_ENABLE(threads, [AC_HELP_STRING([--enable-threads=TYPE], [choose threading package])], THREADS=$enableval, [ AC_MSG_CHECKING([for thread model used by GCC]) THREADS=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` if test -z "$THREADS"; then THREADS=no fi if test "$THREADS" = "posix"; then case "$host" in *-*-mingw*) # Adjust thread model if cross-compiling for MinGW. THREADS=win32 ;; esac fi AC_MSG_RESULT([$THREADS]) ]) AC_ARG_ENABLE(parallel-mark, [AC_HELP_STRING([--disable-parallel-mark], [do not parallelize marking and free list construction])], [case "$THREADS" in no | none | single) if test "${enable_parallel_mark}" != no; then AC_MSG_ERROR([Parallel mark requires --enable-threads=x spec]) fi ;; esac ] ) AC_ARG_ENABLE(thread-local-alloc, [AS_HELP_STRING([--disable-thread-local-alloc], [turn off thread-local allocation optimization])], [case "$THREADS" in no | none | single) if test "${enable_thread_local_alloc}" = yes; then AC_MSG_ERROR( [Thread-local allocation requires --enable-threads=x spec]) fi ;; esac]) AC_ARG_ENABLE(threads-discovery, [AS_HELP_STRING([--disable-threads-discovery], [disable threads discovery in GC])]) if test "${enable_threads_discovery}" = no; then AC_DEFINE([GC_NO_THREADS_DISCOVERY], 1, [Disable threads discovery in GC.]) fi AC_ARG_ENABLE(cplusplus, [AC_HELP_STRING([--enable-cplusplus], [install C++ support])]) dnl Features which may be selected in the following thread-detection switch. AH_TEMPLATE([PARALLEL_MARK], [Define to enable parallel marking.]) AH_TEMPLATE([THREAD_LOCAL_ALLOC], [Define to enable thread-local allocation optimization.]) AH_TEMPLATE([USE_COMPILER_TLS], [Define to use of compiler-support for thread-local variables.]) dnl Thread selection macros. AH_TEMPLATE([GC_THREADS], [Define to support platform-specific threads.]) AH_TEMPLATE([GC_WIN32_PTHREADS], [Define to support pthreads-win32 or winpthreads.]) dnl System header feature requests. AH_TEMPLATE([_POSIX_C_SOURCE], [The POSIX feature macro.]) AH_TEMPLATE([_PTHREADS], [Indicates the use of pthreads (NetBSD).]) dnl Win32-specific API usage controls. AH_TEMPLATE([GC_UNDERSCORE_STDCALL], [Explicitly prefix exported/imported WINAPI symbols with '_'.]) AH_TEMPLATE([UNICODE], [Use Unicode (W) variant of Win32 API instead of ASCII (A) one.]) dnl GC API symbols export control. AH_TEMPLATE([GC_DLL], [Define to build dynamic libraries with only API symbols exposed.]) dnl Check for a flavor of supported inline keyword. old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $CFLAGS_EXTRA" AC_C_INLINE CFLAGS="$old_CFLAGS" THREADDLLIBS= need_atomic_ops_asm=false use_parallel_mark=no use_thread_local_alloc=no # Libraries needed to support dynamic loading and/or threads. case "$THREADS" in no | none | single) THREADS=none ;; posix | pthreads) THREADS=posix default_threadlibs=false # Common defines for most POSIX platforms. case "$host" in *-*-aix* | *-*-android* | *-*-cygwin* | *-*-darwin* | *-*-dragonfly* | \ *-*-freebsd* | *-*-haiku* | *-*-hpux11* | *-*-irix* | \ *-*-kfreebsd*-gnu | *-*-gnu* | *-*-*linux* | *-*-msys* | *-*-nacl* | \ *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris*) AC_DEFINE(GC_THREADS) AC_DEFINE([_REENTRANT], [1], [Required define if using POSIX threads.]) use_parallel_mark=$enable_parallel_mark use_thread_local_alloc=$enable_thread_local_alloc default_threadlibs=true AC_MSG_WARN("Explicit GC_INIT() calls may be required.") ;; esac AC_CHECK_LIB(pthread, pthread_self, THREADDLLIBS="-lpthread",,) case "$host" in *-*-hpux11*) AC_MSG_WARN("Only HP/UX 11 POSIX threads are supported.") AC_DEFINE(_POSIX_C_SOURCE,199506L) THREADDLLIBS="-lpthread -lrt" # HPUX needs REENTRANT for the _r calls. ;; *-*-openbsd*) AM_CFLAGS="$AM_CFLAGS -pthread" THREADDLLIBS=-pthread ;; *-*-freebsd*) AM_CFLAGS="$AM_CFLAGS -pthread" ;; *-*-kfreebsd*-gnu) AM_CFLAGS="$AM_CFLAGS -pthread" THREADDLLIBS=-pthread ;; *-*-gnu*) # E.g. linux but excluding kfreebsd. # The default THREADDLLIBS. ;; *-*-netbsd*) AC_MSG_WARN("Only on NetBSD 2.0 or later.") AC_DEFINE(_PTHREADS) THREADDLLIBS="-lpthread -lrt" ;; *-*-solaris*) THREADDLLIBS="-lpthread -lrt" ;; *-*-cygwin* | *-*-msys*) # Cygwin doesn't have a real libpthread, so Libtool can't link # against it. THREADDLLIBS="" win32_threads=true ;; *-*-mingw*) AC_DEFINE(GC_WIN32_PTHREADS) # Using pthreads-win32 (or other non-Cygwin pthreads) library. 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AM_CFLAGS="-pthread $AM_CFLAGS" ;; aix) THREADS=posix THREADDLLIBS=-lpthread AC_DEFINE(GC_THREADS) AC_DEFINE(_REENTRANT) use_parallel_mark=$enable_parallel_mark use_thread_local_alloc=$enable_thread_local_alloc ;; rtems) THREADS=posix AC_DEFINE(GC_THREADS) use_parallel_mark=$enable_parallel_mark use_thread_local_alloc=$enable_thread_local_alloc ;; decosf1 | irix | mach | os2 | solaris | dce | vxworks) AC_MSG_ERROR(thread package $THREADS not yet supported) ;; *) AC_MSG_ERROR($THREADS is an unknown thread package) ;; esac AC_SUBST(THREADDLLIBS) AM_CONDITIONAL(THREADS, test x$THREADS != xnone) AM_CONDITIONAL(PTHREADS, test x$THREADS = xposix) AM_CONDITIONAL(DARWIN_THREADS, test x$darwin_threads = xtrue) AM_CONDITIONAL(WIN32_THREADS, test x$win32_threads = xtrue) compiler_suncc=no pthread_start_standalone=no case "$host" in *-*-*linux*) # Turn on the workaround described in pthread_start.c. AS_IF([test "$THREADS" = posix], [pthread_start_standalone=yes]) ;; powerpc-*-darwin*) powerpc_darwin=true ;; *-*-solaris*) if test "$GCC" != yes; then # Solaris SunCC compiler_suncc=yes CFLAGS="-O $CFLAGS" fi ;; *-*-wince*) if test "$enable_gc_debug" != "no"; then AC_DEFINE([GC_READ_ENV_FILE], 1, [Read environment variables from the GC 'env' file.]) fi ;; esac AM_CONDITIONAL(PTHREAD_START_STANDALONE, test x$pthread_start_standalone = xyes) if test "$GCC" = yes; then # Output all warnings. 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AM_CONDITIONAL([ASM_WITH_CPP_UNSUPPORTED], [test $compiler_xlc = yes -o $compiler_suncc = yes]) if test "$GCC" = yes; then # Disable aliasing optimization unless forced to. AC_MSG_CHECKING([whether compiler supports -fno-strict-aliasing]) ac_cv_fno_strict_aliasing=no for cflag in $CFLAGS; do case "$cflag" in -fstrict-aliasing) # Opposite option already present ac_cv_fno_strict_aliasing=skipped break ;; esac done if test "$ac_cv_fno_strict_aliasing" != skipped; then old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -fno-strict-aliasing" AC_TRY_COMPILE([],[], [ac_cv_fno_strict_aliasing=yes], []) CFLAGS="$old_CFLAGS" AS_IF([test "$ac_cv_fno_strict_aliasing" = yes], [CFLAGS="$CFLAGS -fno-strict-aliasing"], []) fi AC_MSG_RESULT($ac_cv_fno_strict_aliasing) fi # Check for getcontext (uClibc can be configured without it, for example) AC_CHECK_FUNC([getcontext], [], [ AC_DEFINE([NO_GETCONTEXT], [1], [Missing getcontext function.]) ]) # Check whether dl_iterate_phdr exists (as a strong symbol). AC_CHECK_FUNCS([dl_iterate_phdr]) case "$host" in # While IRIX 6 has libdl for the O32 and N32 ABIs, it's missing for N64 # and unnecessary everywhere. mips-sgi-irix6*) ;; # We never want libdl on darwin. It is a fake libdl that just ends up making # dyld calls anyway. The same applies to Cygwin. *-*-cygwin* | *-*-darwin* | *-*-msys*) ;; *) AC_CHECK_LIB(dl, dlopen, THREADDLLIBS="$THREADDLLIBS -ldl") ;; esac case "$host" in *-*-hpux*) avoid_cpp_lib=yes;; *) avoid_cpp_lib=no; ;; esac AM_CONDITIONAL(AVOID_CPP_LIB,test $avoid_cpp_lib = yes) # Check for various headers. AC_CHECK_HEADER([execinfo.h], [], [ AC_DEFINE([GC_MISSING_EXECINFO_H], [1], [Missing execinfo.h header.]) ]) # extra LD Flags which are required for targets case "${host}" in *-*-darwin*) extra_ldflags_libgc=-Wl,-single_module ;; esac AC_SUBST(extra_ldflags_libgc) AC_SUBST(EXTRA_TEST_LIBS) target_all=libgc.la AC_SUBST(target_all) dnl If the target is an eCos system, use the appropriate eCos dnl I/O routines. dnl FIXME: this should not be a local option but a global target dnl system; at present there is no eCos target. TARGET_ECOS="no" AC_ARG_WITH(ecos, [ --with-ecos enable runtime eCos target support], TARGET_ECOS="$with_ecos" ) addobjs= addlibs= CXXLIBS= case "$TARGET_ECOS" in no) ;; *) AC_DEFINE([ECOS], 1, [Define to enable eCos target support.]) AM_CPPFLAGS="-I${TARGET_ECOS}/include $AM_CPPFLAGS" addobjs="$addobjs ecos.lo" ;; esac AM_CONDITIONAL(CPLUSPLUS, test "${enable_cplusplus}" = yes) if test "$GCC" = yes; then if test "${enable_cplusplus}" = yes; then case "$host" in *-*-cygwin* | *-*-mingw* | *-*-msys*) AC_MSG_CHECKING([whether libsupc++ required]) SUPC="`$CXX -print-file-name=libsupc++.a 2>/dev/null`" if test -n "$SUPC" -a "$SUPC" != "libsupc++.a"; then AC_MSG_RESULT(yes) CXXLIBS="-lsupc++" else AC_MSG_RESULT(no) fi ;; esac fi fi AC_SUBST(CXX) AC_SUBST(AM_CFLAGS) AC_SUBST(AM_CPPFLAGS) AC_SUBST(CXXLIBS) # Configuration of shared libraries # AC_MSG_CHECKING(whether to build shared libraries) AC_ENABLE_SHARED case "$host" in alpha-*-openbsd*) enable_shared=no ;; *) ;; esac AC_MSG_RESULT($enable_shared) # Compile with GC_DLL defined unless building static libraries. if test "${enable_shared}" = yes; then if test "${enable_static}" = no; then AC_DEFINE(GC_DLL) if test "$GCC" = yes; then # Pass -fvisibility=hidden option if supported AC_MSG_CHECKING([whether compiler supports -fvisibility]) old_CFLAGS="$CFLAGS" CFLAGS="-Werror -fvisibility=hidden $CFLAGS" AC_TRY_COMPILE([],[], [ac_cv_fvisibility_hidden=yes], [ac_cv_fvisibility_hidden=no]) CFLAGS="$old_CFLAGS" AS_IF([test "$ac_cv_fvisibility_hidden" = yes], [CFLAGS="-DGC_VISIBILITY_HIDDEN_SET -fvisibility=hidden $CFLAGS"], [CFLAGS="-DGC_NO_VISIBILITY $CFLAGS"]) AC_MSG_RESULT($ac_cv_fvisibility_hidden) fi fi fi # Configuration of machine-dependent code # AC_MSG_CHECKING(which machine-dependent code should be used) machdep= case "$host" in alpha-*-openbsd*) if test x"${ac_cv_lib_dl_dlopen}" != xyes ; then AC_MSG_WARN( "OpenBSD/Alpha without dlopen(). Shared library support is disabled.") fi ;; i?86-*-solaris2.[[89]]) # PROC_VDB appears to work in 2.8 and 2.9 but not in 2.10+ (for now). AC_DEFINE([SOLARIS25_PROC_VDB_BUG_FIXED], 1, [See the comment in gcconfig.h.]) ;; mips-*-*) dnl AC_DEFINE(NO_EXECUTE_PERMISSION) dnl This is now redundant, but it is also important for incremental GC dnl performance under Irix. ;; sparc-*-netbsd*) machdep="sparc_netbsd_mach_dep.lo" ;; sparc*-*-linux* | sparc*-*-openbsd* | sparc64-*-freebsd* | sparc64-*-netbsd*) machdep="sparc_mach_dep.lo" ;; sparc-sun-solaris2.3) machdep="sparc_mach_dep.lo" AC_DEFINE(SUNOS53_SHARED_LIB, 1, [Define to work around a Solaris 5.3 bug (see dyn_load.c).]) ;; sparc*-sun-solaris2*) machdep="sparc_mach_dep.lo" ;; ia64-*-*) machdep="ia64_save_regs_in_stack.lo" ;; *-*-nacl*) AC_DEFINE(NO_EXECUTE_PERMISSION) ;; esac AC_MSG_RESULT($machdep) addobjs="$addobjs $machdep" AC_SUBST(addobjs) AC_SUBST(addlibs) AC_PROG_LIBTOOL dnl We use these options to decide which functions to include. AC_ARG_WITH(target-subdir, [ --with-target-subdir=SUBDIR configuring with a cross compiler]) AC_ARG_WITH(cross-host, [ --with-cross-host=HOST configuring with a cross compiler]) dnl automake wants to see AC_EXEEXT. But we don't need it. And having dnl it is actually a problem, because the compiler we're passed can't dnl necessarily do a full link. So we fool automake here. if false; then dnl autoconf 2.50 runs AC_EXEEXT by default, and the macro expands dnl to nothing, so nothing would remain between `then' and `fi' if it dnl were not for the `:' below. : AC_EXEEXT fi dnl As of 4.13a2, the collector will not properly work on Solaris when dnl built with gcc and -O. So we remove -O in the appropriate case. dnl Not needed anymore on Solaris. AC_MSG_CHECKING(whether Solaris gcc optimization fix is necessary) case "$host" in *aix*) if test "$GCC" = yes; then AC_MSG_RESULT(yes) new_CFLAGS= for i in $CFLAGS; do case "$i" in -O*) ;; *) new_CFLAGS="$new_CFLAGS $i" ;; esac done CFLAGS="$new_CFLAGS" else AC_MSG_RESULT(no) fi ;; *) AC_MSG_RESULT(no) ;; esac dnl Include defines that have become de facto standard. dnl ALL_INTERIOR_POINTERS and NO_EXECUTE_PERMISSION can be overridden dnl in the startup code. AC_DEFINE([NO_EXECUTE_PERMISSION], [1], [Define to make the collector not allocate executable memory by default.]) AC_DEFINE([ALL_INTERIOR_POINTERS], [1], [Define to recognise all pointers to the interior of objects.]) dnl Interface Selection dnl ------------------- dnl dnl By default, make the library as general as possible. dnl enable_gcj_support=no AC_ARG_ENABLE(gcj-support, [AC_HELP_STRING([--disable-gcj-support], [disable support for gcj])]) if test x"$enable_gcj_support" != xno; then AC_DEFINE(GC_GCJ_SUPPORT, 1, [Define to include support for gcj.]) case "$host" in *-*-kfreebsd*-gnu) # FIXME: For a reason, gctest hangs up on kFreeBSD if both of # THREAD_LOCAL_ALLOC and GC_ENABLE_SUSPEND_THREAD are defined. if test "${enable_thread_local_alloc}" = no; then AC_DEFINE(GC_ENABLE_SUSPEND_THREAD) fi ;; *) AC_DEFINE([GC_ENABLE_SUSPEND_THREAD], 1, [Define to turn on GC_suspend_thread support.]) ;; esac fi dnl Interaction with other programs that might use signals. AC_ARG_ENABLE(sigrt-signals, [AC_HELP_STRING([--enable-sigrt-signals], [force GC to use SIGRTMIN-based signals for thread suspend/resume])]) if test x"${enable_sigrt_signals}" = xyes; then AC_DEFINE([GC_USESIGRT_SIGNALS], 1, [Force the GC to use signals based on SIGRTMIN+k.]) fi dnl Debugging dnl --------- AH_TEMPLATE([GC_HAVE_BUILTIN_BACKTRACE], [Define if backtrace information is supported.]) AH_TEMPLATE([MAKE_BACK_GRAPH], [See doc/README.macros.]) AH_TEMPLATE([SAVE_CALL_COUNT], [The number of caller frames saved when allocating with the debugging API.]) UNWINDLIBS= AC_ARG_ENABLE(gc-debug, [AC_HELP_STRING([--enable-gc-debug], [include full support for pointer backtracing etc.])], [ if test "$enable_gc_debug" = "yes"; then AC_MSG_WARN("Should define GC_DEBUG and use debug alloc in clients.") AC_DEFINE([KEEP_BACK_PTRS], 1, [Define to save back-pointers in debugging headers.]) keep_back_ptrs=true AC_DEFINE([DBG_HDRS_ALL], 1, [Define to force debug headers on all objects.]) AH_TEMPLATE([SHORT_DBG_HDRS], [Shorten the headers to minimize object size at the expense of checking for writes past the end (see doc/README.macros).]) case $host in ia64-*-linux* ) AC_DEFINE(MAKE_BACK_GRAPH) AC_DEFINE(SAVE_CALL_COUNT, 8) AC_CHECK_LIB(unwind, backtrace, [ AC_DEFINE(GC_HAVE_BUILTIN_BACKTRACE) UNWINDLIBS=-lunwind AC_MSG_WARN("Client code may need to link against libunwind.") ]) ;; x86-*-linux* | i586-*-linux* | i686-*-linux* | x86_64-*-linux* ) AC_DEFINE(MAKE_BACK_GRAPH) AC_MSG_WARN("Client must not use -fomit-frame-pointer.") AC_DEFINE(SAVE_CALL_COUNT, 8) ;; i[3456]86-*-dgux*) AC_DEFINE(MAKE_BACK_GRAPH) ;; esac ] fi) AM_CONDITIONAL([MAKE_BACK_GRAPH], [test x"$enable_gc_debug" = xyes]) AM_CONDITIONAL([KEEP_BACK_PTRS], [test x"$keep_back_ptrs" = xtrue]) # Check for dladdr (used for debugging). AC_MSG_CHECKING(for dladdr) have_dladdr=no old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $CFLAGS_EXTRA" AC_TRY_COMPILE([ #define _GNU_SOURCE 1 #include ], [{ Dl_info info; (void)dladdr("", &info); }], [ have_dladdr=yes ]) CFLAGS="$old_CFLAGS" AC_MSG_RESULT($have_dladdr) if test x"$have_dladdr" = xyes; then AC_DEFINE([HAVE_DLADDR], 1, [Define to use 'dladdr' function.]) fi # sigsetjmp could be a macro (thus AC_CHECK_FUNCS cannot be used). AC_MSG_CHECKING(for sigsetjmp) old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $CFLAGS_EXTRA" AC_TRY_LINK([#include ], [sigjmp_buf t; sigsetjmp(t, 0)], [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no) AC_DEFINE([GC_NO_SIGSETJMP], [1], [Missing sigsetjmp function.])]) CFLAGS="$old_CFLAGS" # Check for AViiON Machines running DGUX ac_is_dgux=no AC_CHECK_HEADER(sys/dg_sys_info.h, [ac_is_dgux=yes;]) dnl :GOTCHA: we do not check anything but sys/dg_sys_info.h if test $ac_is_dgux = yes; then dgux_spec_opts="-DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2" CFLAGS="$dgux_spec_opts $CFLAGS" CXXFLAGS="$dgux_spec_opts $CXXFLAGS" if test "$enable_gc_debug" = "yes"; then CFLAGS="-g -mstandard $CFLAGS" CXXFLAGS="-g -mstandard $CXXFLAGS" fi AC_SUBST(CFLAGS) AC_SUBST(CXXFLAGS) fi AC_ARG_ENABLE(java-finalization, [AC_HELP_STRING([--disable-java-finalization], [disable support for java finalization])]) if test x"$enable_java_finalization" != xno; then AC_DEFINE([JAVA_FINALIZATION], 1, [See doc/README.macros.]) fi AC_ARG_ENABLE(atomic-uncollectable, [AC_HELP_STRING([--disable-atomic-uncollectible], [disable support for atomic uncollectible allocation])]) if test x"$enable_atomic_uncollectible" != x"no"; then AC_DEFINE([GC_ATOMIC_UNCOLLECTABLE], 1, [Define to enable atomic uncollectible allocation.]) fi AC_ARG_ENABLE(redirect-malloc, [AC_HELP_STRING([--enable-redirect-malloc], [redirect malloc and friends to GC routines])]) if test "${enable_redirect_malloc}" = yes; then if test "${enable_gc_debug}" = yes; then AC_DEFINE([REDIRECT_MALLOC], GC_debug_malloc_replacement, [If defined, redirect malloc to this function.]) AC_DEFINE([REDIRECT_REALLOC], GC_debug_realloc_replacement, [If defined, redirect GC_realloc to this function.]) AC_DEFINE([REDIRECT_FREE], GC_debug_free, [If defined, redirect free to this function.]) else AC_DEFINE(REDIRECT_MALLOC, GC_malloc) fi AC_DEFINE([GC_USE_DLOPEN_WRAP], 1, [See doc/README.macros.]) fi AC_ARG_ENABLE(disclaim, [AC_HELP_STRING([--disable-disclaim], [disable alternative (more efficient) finalization interface])]) if test x"$enable_disclaim" != xno; then AC_DEFINE(ENABLE_DISCLAIM, 1, [Define to enable alternative finalization interface.]) fi AM_CONDITIONAL(ENABLE_DISCLAIM, [test x"$enable_disclaim" != xno]) AC_ARG_ENABLE(large-config, [AC_HELP_STRING([--enable-large-config], [optimize for large (> 100 MB) heap or root set])]) if test "${enable_large_config}" = yes; then AC_DEFINE(LARGE_CONFIG, 1, [Define to optimize for large heaps or root sets.]) fi dnl This is something of a hack. When cross-compiling we turn off dnl some functionality. We also enable the "small" configuration. dnl These is only correct when targeting an embedded system. FIXME. if test -n "${with_cross_host}"; then AC_DEFINE([NO_CLOCK], 1, [Define to not use system clock (cross compiling).]) AC_DEFINE([SMALL_CONFIG], 1, [Define to tune the collector for small heap sizes.]) fi if test "$enable_gc_debug" = "no"; then AC_DEFINE([NO_DEBUGGING], 1, [Disable debugging, like GC_dump and its callees.]) fi AC_SUBST(UNWINDLIBS) AC_ARG_ENABLE(gc-assertions, [AC_HELP_STRING([--enable-gc-assertions], [collector-internal assertion checking])]) if test "${enable_gc_assertions}" = yes; then AC_DEFINE([GC_ASSERTIONS], 1, [Define to enable internal debug assertions.]) fi AC_ARG_ENABLE(mmap, [AS_HELP_STRING([--enable-mmap], [use mmap instead of sbrk to expand the heap])], gc_use_mmap=$enableval) AC_ARG_ENABLE(munmap, [AC_HELP_STRING([--enable-munmap=N], [return page to the OS if empty for N collections (default: 6)])], MUNMAP_THRESHOLD=$enableval) if test x$enable_munmap != xno; then AC_DEFINE([USE_MMAP], 1, [Define to use mmap instead of sbrk to expand the heap.]) AH_TEMPLATE([USE_WINALLOC], [Define to use Win32 VirtualAlloc (instead of sbrk or mmap) to expand the heap.]) AC_DEFINE([USE_MUNMAP], 1, [Define to return memory to OS with munmap calls (see doc/README.macros).]) if test x$MUNMAP_THRESHOLD = x -o x$MUNMAP_THRESHOLD = xyes; then MUNMAP_THRESHOLD=6 fi AC_DEFINE_UNQUOTED([MUNMAP_THRESHOLD], [${MUNMAP_THRESHOLD}], [Number of GC cycles to wait before unmapping an unused block.]) else if test "${gc_use_mmap}" = "yes"; then AC_DEFINE([USE_MMAP], 1, [Define to use mmap instead of sbrk to expand the heap.]) fi fi AC_ARG_ENABLE(dynamic-loading, [AS_HELP_STRING([--disable-dynamic-loading], [build the collector with disabled tracing of dynamic library data roots])]) if test "${enable_dynamic_loading}" = "no"; then AC_DEFINE([IGNORE_DYNAMIC_LOADING], 1, [Do not define DYNAMIC_LOADING even if supported (i.e., build the collector with disabled tracing of dynamic library data roots).]) fi AC_ARG_ENABLE(register-main-static-data, [AS_HELP_STRING([--disable-register-main-static-data], [skip the initial guess of data root sets])]) if test "${enable_register_main_static_data}" = "no"; then AC_DEFINE([GC_DONT_REGISTER_MAIN_STATIC_DATA], 1, [Skip the initial guess of data root sets.]) fi AC_ARG_ENABLE(checksums, [AS_HELP_STRING([--enable-checksums], [report on erroneously cleared dirty bits at substantial performance cost; use only for debugging of the incremental collector])]) if test x$enable_checksums = xyes; then if test x$enable_munmap != xno -o x$THREADS != xnone; then AC_MSG_ERROR([CHECKSUMS not compatible with USE_MUNMAP or threads]) fi AC_DEFINE([CHECKSUMS], 1, [Erroneously cleared dirty bits checking. Use only for debugging of the incremental collector.]) fi AM_CONDITIONAL([CHECKSUMS], test x$enable_checksums = xyes) AM_CONDITIONAL(USE_LIBDIR, test -z "$with_cross_host") AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror], [pass -Werror to the C compiler])], werror_flag=$enableval, werror_flag=no) if test x$werror_flag = xyes; then WERROR_CFLAGS="-Werror" case "$host" in # _dyld_bind_fully_image_containing_address is deprecated in OS X 10.5+ *-*-darwin*) WERROR_CFLAGS="$WERROR_CFLAGS -Wno-deprecated-declarations" ;; esac fi AC_SUBST([WERROR_CFLAGS]) AC_ARG_ENABLE(single-obj-compilation, [AC_HELP_STRING([--enable-single-obj-compilation], [compile all libgc source files into single .o (default: yes if static libraries are disabled)])], [], [ AS_IF([test x"$enable_static" = xno], [enable_single_obj_compilation=yes]) ]) AM_CONDITIONAL([SINGLE_GC_OBJ], [test x"$enable_single_obj_compilation" = xyes]) AC_ARG_ENABLE(gcov, [AS_HELP_STRING([--enable-gcov], [turn on code coverage analysis])]) if test "$enable_gcov" = "yes"; then CFLAGS="$CFLAGS --coverage" if test "${enable_shared}" = no; then # FIXME: As of g++-4.8.4/x86_64, in case of shared library build, test_cpp # linkage fails with "hidden symbol atexit is referenced by DSO" message. CXXFLAGS="$CXXFLAGS --coverage" fi # Turn off optimization to get accurate line numbers. CFLAGS=`echo "$CFLAGS" | sed -e 's/-O\(1\|2\|3\|4\|s\|fast\)\?//g'` CXXFLAGS=`echo "$CXXFLAGS" | sed -e 's/-O\(1\|2\|3\|4\|s\|fast\)\?//g'` fi AC_ARG_ENABLE(docs, [AC_HELP_STRING([--disable-docs], [do not build and install documentation])]) AM_CONDITIONAL(ENABLE_DOCS, test x$enable_docs != xno) AM_CONDITIONAL(ENABLE_SHARED, test x$enable_shared = xyes) # Atomic Ops # ---------- # Do we want to use an external libatomic_ops? By default use it if it's # found. AC_ARG_WITH([libatomic-ops], [AS_HELP_STRING([--with-libatomic-ops[=yes|no|check|none]], [Use an external libatomic_ops? (default: check; none: use compiler intrinsics or no thread support)])], [], [ AS_IF([test x"$THREADS" != xnone], [with_libatomic_ops=check], [with_libatomic_ops=none]) ]) # Check whether compiler atomic intrinsics can be used. if test x"$with_libatomic_ops" = xcheck; then AC_MSG_CHECKING(for compiler intrinsics support) old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $CFLAGS_EXTRA -DGC_BUILTIN_ATOMIC" CFLAGS="$CFLAGS -I${srcdir}/include -I${srcdir}/tests" AC_TRY_RUN([#include "test_atomic_ops.c"], [AC_MSG_RESULT(yes) with_libatomic_ops=none], [AC_MSG_RESULT(no)], [AC_MSG_RESULT(skipped because cross-compiling)]) CFLAGS="$old_CFLAGS" fi # Check for an external libatomic_ops if the above answer is "yes" or "check". # If not found, fail on "yes", and convert "check" to "no". # First, check that libatomic_ops usage is not disabled explicitly. missing_libatomic_ops=false AS_IF([test x"$with_libatomic_ops" != xno -a x"$with_libatomic_ops" != xnone], [ missing_libatomic_ops=true ]) dnl To avoid "syntax error near unexpected token ATOMIC_OPS" configure error dnl observed by some clients, the following 3 code lines are commented out: dnl dnl AS_IF([test x$missing_libatomic_ops = xtrue], dnl [ PKG_CHECK_MODULES([ATOMIC_OPS], [atomic_ops], dnl [ missing_libatomic_ops=false ], [ [] ]) ]) dnl Retry with AC_CHECK_HEADER if PKG_CHECK_MODULES failed. AS_IF([test x$missing_libatomic_ops = xtrue], [ AC_CHECK_HEADER([atomic_ops.h], [missing_libatomic_ops=false]) ]) AS_IF([test x$missing_libatomic_ops = xtrue], [ AS_IF([test x"$with_libatomic_ops" != xcheck], [ AC_MSG_ERROR([An external libatomic_ops was not found]) ]) with_libatomic_ops=no ]) # If we have neither an external or an internal version, offer a useful hint # and exit. AS_IF([test x"$with_libatomic_ops" = xno \ -a ! -e "$srcdir/libatomic_ops/src/atomic_ops.h"], [ AC_MSG_ERROR([libatomic_ops is required. You can either install it on your system, or fetch and unpack a recent version into the source directory and link or rename it to libatomic_ops.]) ]) # Finally, emit the definitions for bundled or external AO. AC_MSG_CHECKING([which libatomic_ops to use]) AS_IF([test x"$with_libatomic_ops" != xno], [ AS_IF([test x"$with_libatomic_ops" != xnone -a x"$THREADS" != xnone], [ AC_MSG_RESULT([external]) ATOMIC_OPS_LIBS="-latomic_ops" AC_SUBST([ATOMIC_OPS_LIBS]) ], [ AC_MSG_RESULT([none]) AS_IF([test x"$THREADS" != xnone], [ AC_DEFINE([GC_BUILTIN_ATOMIC], [1], [Use C11 (GCC) atomic intrinsics instead of libatomic_ops primitives.]) ]) ]) AO_TRYLINK_CFLAGS="" ], [ AC_MSG_RESULT([internal]) AO_TRYLINK_CFLAGS="-I${srcdir}/libatomic_ops/src" ATOMIC_OPS_CFLAGS='-I$(top_builddir)/libatomic_ops/src -I$(top_srcdir)/libatomic_ops/src' ATOMIC_OPS_LIBS="" AC_SUBST([ATOMIC_OPS_CFLAGS]) AC_CONFIG_SUBDIRS([libatomic_ops]) ]) AM_CONDITIONAL([USE_INTERNAL_LIBATOMIC_OPS], [test x$with_libatomic_ops = xno -a x"$THREADS" != xnone]) AM_CONDITIONAL([NEED_ATOMIC_OPS_ASM], [test x$with_libatomic_ops = xno -a x$need_atomic_ops_asm = xtrue]) # Check whether particular AO primitives are emulated with locks. # The check below is based on the fact that linking with the libatomic_ops # binary file is not needed in case of absence of the emulation (except for # Solaris SPARC). AS_IF([test x$with_libatomic_ops != xnone -a x$need_atomic_ops_asm != xtrue], [ old_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $AO_TRYLINK_CFLAGS $CFLAGS_EXTRA" AC_MSG_CHECKING([for lock-free AO_or primitive]) AC_TRY_LINK([#include "atomic_ops.h"], [AO_t x=0;AO_or(&x,1)], [ AC_MSG_RESULT(yes) AC_DEFINE([HAVE_LOCKFREE_AO_OR], [1], [libatomic_ops AO_or primitive implementation is lock-free.]) ], [ AC_MSG_RESULT(no) ]) AC_MSG_CHECKING([for lock-free AO load/store, test-and-set primitives]) AC_TRY_LINK([#include "atomic_ops.h"], [AO_t x=0;unsigned char c=0;AO_TS_t z=AO_TS_INITIALIZER; (void)AO_test_and_set_acquire(&z);AO_CLEAR(&z);AO_compiler_barrier(); AO_store(&x,AO_load(&x)+1);AO_char_store(&c,AO_char_load(&c)+1); AO_store_release(&x,AO_load_acquire(&x)+1)], [ AC_MSG_RESULT(yes) ], [ AC_MSG_RESULT(no) use_thread_local_alloc=no AC_DEFINE([BASE_ATOMIC_OPS_EMULATED], [1], [AO load, store and/or test-and-set primitives are implemented in libatomic_ops using locks.]) ]) AS_IF([test x$use_parallel_mark != xno], [ AC_MSG_CHECKING( [for lock-free compare-and-swap and fetch-and-add primitives]) AC_TRY_LINK( [#define AO_REQUIRE_CAS #include "atomic_ops.h"], [AO_t x=0;(void)AO_fetch_and_add(&x,1);(void)AO_compare_and_swap(&x,1,2)], [ AC_MSG_RESULT(yes) ], [ AC_MSG_RESULT(no) use_parallel_mark=no ]) ]) CFLAGS="$old_CFLAGS" ]) AS_IF([test x$use_parallel_mark != xno], [ AC_DEFINE(PARALLEL_MARK) ]) AS_IF([test x$use_thread_local_alloc != xno], [ AC_DEFINE(THREAD_LOCAL_ALLOC) ]) AM_CONDITIONAL(THREAD_LOCAL_ALLOC, test x$use_thread_local_alloc != xno) AC_ARG_ENABLE(handle-fork, [ AC_HELP_STRING([--enable-handle-fork[=yes|no|auto|manual]], [attempt to ensure a usable collector after fork() in multi-threaded programs (default: auto; manual: GC_atfork_prepare/parent/child should be called by the client)]) ]) if test "${enable_handle_fork}" = yes; then AC_DEFINE(HANDLE_FORK, 1, [Define to install pthread_atfork() handlers by default.]) elif test "${enable_handle_fork}" = no; then AC_DEFINE(NO_HANDLE_FORK, 1, [Prohibit installation of pthread_atfork() handlers.]) elif test "${enable_handle_fork}" != manual -a x$THREADS = xposix; then # If the option is omitted, pthread_atfork handlers are installed # by default for the targets where pthread_atfork is known to work. case "$host" in *-*-android*) # Android NDK does not provide pthread_atfork. ;; *-*-darwin*) # The incremental mode (which is off if parallel marking) conflicts # with fork handling on Darwin. if test x$use_parallel_mark != xno; then AC_DEFINE(HANDLE_FORK) fi ;; *-*-aix* | *-*-cygwin* | *-*-freebsd* | *-*-haiku* | \ *-*-hpux11* | *-*-irix* | *-*-kfreebsd*-gnu | \ *-*-*linux* | *-*-netbsd* | *-*-openbsd* | *-*-osf* | *-*-solaris*) AC_DEFINE(HANDLE_FORK) ;; esac fi dnl Produce the Files dnl ----------------- AC_CONFIG_FILES([Makefile bdw-gc.pc]) AC_CONFIG_COMMANDS([default],, [ srcdir="${srcdir}" host=${host} CONFIG_SHELL=${CONFIG_SHELL-/bin/sh} CC="${CC}" DEFS="$DEFS" ]) AC_OUTPUT