#*************************************************************************** # _ _ ____ _ # Project ___| | | | _ \| | # / __| | | | |_) | | # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # # Copyright (C) Daniel Stenberg, , et al. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms # are also available at https://curl.se/docs/copyright.html. # # You may opt to use, copy, modify, merge, publish, distribute and/or sell # copies of the Software, and permit persons to whom the Software is # furnished to do so, under the terms of the COPYING file. # # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY # KIND, either express or implied. # # SPDX-License-Identifier: curl # #*************************************************************************** # File version for 'aclocal' use. Keep it a single number. # serial 19 dnl CURL_CHECK_OPTION_THREADED_RESOLVER dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-threaded-resolver or --disable-threaded-resolver, and dnl set shell variable want_thres as appropriate. AC_DEFUN([CURL_CHECK_OPTION_THREADED_RESOLVER], [ AC_MSG_CHECKING([whether to enable the threaded resolver]) OPT_THRES="default" AC_ARG_ENABLE(threaded_resolver, AS_HELP_STRING([--enable-threaded-resolver],[Enable threaded resolver]) AS_HELP_STRING([--disable-threaded-resolver],[Disable threaded resolver]), OPT_THRES=$enableval) case "$OPT_THRES" in no) dnl --disable-threaded-resolver option used want_thres="no" ;; *) dnl configure option not specified want_thres="yes" ;; esac AC_MSG_RESULT([$want_thres]) ]) dnl CURL_CHECK_OPTION_ARES dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-ares or --disable-ares, and dnl set shell variable want_ares as appropriate. AC_DEFUN([CURL_CHECK_OPTION_ARES], [ dnl AC_BEFORE([$0],[CURL_CHECK_OPTION_THREADS])dnl AC_BEFORE([$0],[CURL_CHECK_LIB_ARES])dnl AC_MSG_CHECKING([whether to enable c-ares for DNS lookups]) OPT_ARES="default" AC_ARG_ENABLE(ares, AS_HELP_STRING([--enable-ares@<:@=PATH@:>@],[Enable c-ares for DNS lookups]) AS_HELP_STRING([--disable-ares],[Disable c-ares for DNS lookups]), OPT_ARES=$enableval) case "$OPT_ARES" in no) dnl --disable-ares option used want_ares="no" ;; default) dnl configure option not specified want_ares="no" ;; *) dnl --enable-ares option used want_ares="yes" if test -n "$enableval" && test "$enableval" != "yes"; then want_ares_path="$enableval" fi ;; esac AC_MSG_RESULT([$want_ares]) ]) dnl CURL_CHECK_OPTION_CURLDEBUG dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-curldebug or --disable-curldebug, and set dnl shell variable want_curldebug value as appropriate. AC_DEFUN([CURL_CHECK_OPTION_CURLDEBUG], [ AC_BEFORE([$0],[CURL_CHECK_CURLDEBUG])dnl AC_MSG_CHECKING([whether to enable curl debug memory tracking]) OPT_CURLDEBUG_BUILD="default" AC_ARG_ENABLE(curldebug, AS_HELP_STRING([--enable-curldebug],[Enable curl debug memory tracking]) AS_HELP_STRING([--disable-curldebug],[Disable curl debug memory tracking]), OPT_CURLDEBUG_BUILD=$enableval) case "$OPT_CURLDEBUG_BUILD" in no) dnl --disable-curldebug option used want_curldebug="no" AC_MSG_RESULT([no]) ;; default) dnl configure's curldebug option not specified. Initially we will dnl handle this as a request to use the same setting as option dnl --enable-debug. IOW, initially, for debug-enabled builds dnl this will be handled as a request to enable curldebug if dnl possible, and for debug-disabled builds this will be handled dnl as a request to disable curldebug. if test "$want_debug" = "yes"; then AC_MSG_RESULT([(assumed) yes]) AC_DEFINE(CURLDEBUG, 1, [to enable curl debug memory tracking]) else AC_MSG_RESULT([no]) fi want_curldebug_assumed="yes" want_curldebug="$want_debug" ;; *) dnl --enable-curldebug option used. dnl The use of this option value is a request to enable curl's dnl debug memory tracking for the libcurl library. This can only dnl be done when some requisites are simultaneously satisfied. dnl Later on, these requisites are verified and if they are not dnl fully satisfied the option will be ignored and act as if dnl --disable-curldebug had been given setting shell variable dnl want_curldebug to 'no'. want_curldebug="yes" AC_DEFINE(CURLDEBUG, 1, [to enable curl debug memory tracking]) AC_MSG_RESULT([yes]) ;; esac ]) dnl CURL_CHECK_OPTION_DEBUG dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-debug or --disable-debug, and set shell dnl variable want_debug value as appropriate. AC_DEFUN([CURL_CHECK_OPTION_DEBUG], [ AC_BEFORE([$0],[CURL_CHECK_OPTION_WARNINGS])dnl AC_BEFORE([$0],[CURL_CHECK_OPTION_CURLDEBUG])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable debug build options]) OPT_DEBUG_BUILD="default" AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug],[Enable debug build options]) AS_HELP_STRING([--disable-debug],[Disable debug build options]), OPT_DEBUG_BUILD=$enableval) case "$OPT_DEBUG_BUILD" in no) dnl --disable-debug option used want_debug="no" ;; default) dnl configure option not specified want_debug="no" ;; *) dnl --enable-debug option used want_debug="yes" AC_DEFINE(DEBUGBUILD, 1, [enable debug build options]) ;; esac AC_MSG_RESULT([$want_debug]) ]) dnl CURL_CHECK_OPTION_OPTIMIZE dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-optimize or --disable-optimize, and set dnl shell variable want_optimize value as appropriate. AC_DEFUN([CURL_CHECK_OPTION_OPTIMIZE], [ AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable compiler optimizer]) OPT_COMPILER_OPTIMIZE="default" AC_ARG_ENABLE(optimize, AS_HELP_STRING([--enable-optimize],[Enable compiler optimizations]) AS_HELP_STRING([--disable-optimize],[Disable compiler optimizations]), OPT_COMPILER_OPTIMIZE=$enableval) case "$OPT_COMPILER_OPTIMIZE" in no) dnl --disable-optimize option used. We will handle this as dnl a request to disable compiler optimizations if possible. dnl If the compiler is known CFLAGS and CPPFLAGS will be dnl overridden, otherwise this can not be honored. want_optimize="no" AC_MSG_RESULT([no]) ;; default) dnl configure's optimize option not specified. Initially we will dnl handle this as a request contrary to configure's setting dnl for --enable-debug. IOW, initially, for debug-enabled builds dnl this will be handled as a request to disable optimizations if dnl possible, and for debug-disabled builds this will be handled dnl initially as a request to enable optimizations if possible. dnl Finally, if the compiler is known and CFLAGS and CPPFLAGS do dnl not have any optimizer flag the request will be honored, in dnl any other case the request can not be honored. dnl IOW, existing optimizer flags defined in CFLAGS or CPPFLAGS dnl will always take precedence over any initial assumption. if test "$want_debug" = "yes"; then want_optimize="assume_no" AC_MSG_RESULT([(assumed) no]) else want_optimize="assume_yes" AC_MSG_RESULT([(assumed) yes]) fi ;; *) dnl --enable-optimize option used. We will handle this as dnl a request to enable compiler optimizations if possible. dnl If the compiler is known CFLAGS and CPPFLAGS will be dnl overridden, otherwise this can not be honored. want_optimize="yes" AC_MSG_RESULT([yes]) ;; esac ]) dnl CURL_CHECK_OPTION_SYMBOL_HIDING dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-symbol-hiding or --disable-symbol-hiding, dnl setting shell variable want_symbol_hiding value. AC_DEFUN([CURL_CHECK_OPTION_SYMBOL_HIDING], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER_SYMBOL_HIDING])dnl AC_MSG_CHECKING([whether to enable hiding of library internal symbols]) OPT_SYMBOL_HIDING="default" AC_ARG_ENABLE(symbol-hiding, AS_HELP_STRING([--enable-symbol-hiding],[Enable hiding of library internal symbols]) AS_HELP_STRING([--disable-symbol-hiding],[Disable hiding of library internal symbols]), OPT_SYMBOL_HIDING=$enableval) case "$OPT_SYMBOL_HIDING" in no) dnl --disable-symbol-hiding option used. dnl This is an indication to not attempt hiding of library internal dnl symbols. Default symbol visibility will be used, which normally dnl exposes all library internal symbols. want_symbol_hiding="no" AC_MSG_RESULT([no]) ;; default) dnl configure's symbol-hiding option not specified. dnl Handle this as if --enable-symbol-hiding option was given. want_symbol_hiding="yes" AC_MSG_RESULT([yes]) ;; *) dnl --enable-symbol-hiding option used. dnl This is an indication to attempt hiding of library internal dnl symbols. This is only supported on some compilers/linkers. want_symbol_hiding="yes" AC_MSG_RESULT([yes]) ;; esac ]) dnl CURL_CHECK_OPTION_THREADS dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-threads or --disable-threads, and dnl set shell variable want_threads as appropriate. dnl AC_DEFUN([CURL_CHECK_OPTION_THREADS], [ dnl AC_BEFORE([$0],[CURL_CHECK_LIB_THREADS])dnl dnl AC_MSG_CHECKING([whether to enable threads for DNS lookups]) dnl OPT_THREADS="default" dnl AC_ARG_ENABLE(threads, dnl AS_HELP_STRING([--enable-threads@<:@=PATH@:>@],[Enable threads for DNS lookups]) dnl AS_HELP_STRING([--disable-threads],[Disable threads for DNS lookups]), dnl OPT_THREADS=$enableval) dnl case "$OPT_THREADS" in dnl no) dnl dnl --disable-threads option used dnl want_threads="no" dnl AC_MSG_RESULT([no]) dnl ;; dnl default) dnl dnl configure option not specified dnl want_threads="no" dnl AC_MSG_RESULT([(assumed) no]) dnl ;; dnl *) dnl dnl --enable-threads option used dnl want_threads="yes" dnl want_threads_path="$enableval" dnl AC_MSG_RESULT([yes]) dnl ;; dnl esac dnl # dnl if test "$want_ares" = "assume_yes"; then dnl if test "$want_threads" = "yes"; then dnl AC_MSG_CHECKING([whether to ignore c-ares enabling assumed setting]) dnl AC_MSG_RESULT([yes]) dnl want_ares="no" dnl else dnl want_ares="yes" dnl fi dnl fi dnl if test "$want_threads" = "yes" && test "$want_ares" = "yes"; then dnl AC_MSG_ERROR([options --enable-ares and --enable-threads are mutually exclusive, at most one may be enabled.]) dnl fi dnl ]) dnl CURL_CHECK_OPTION_RT dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --disable-rt and set shell variable dontwant_rt dnl as appropriate. AC_DEFUN([CURL_CHECK_OPTION_RT], [ AC_BEFORE([$0], [CURL_CHECK_LIB_THREADS])dnl AC_MSG_CHECKING([whether to disable dependency on -lrt]) OPT_RT="default" AC_ARG_ENABLE(rt, AS_HELP_STRING([--disable-rt],[disable dependency on -lrt]), OPT_RT=$enableval) case "$OPT_RT" in no) dnl --disable-rt used (reverse logic) dontwant_rt="yes" AC_MSG_RESULT([yes]) ;; default) dnl configure option not specified (so not disabled) dontwant_rt="no" AC_MSG_RESULT([(assumed no)]) ;; *) dnl --enable-rt option used (reverse logic) dontwant_rt="no" AC_MSG_RESULT([no]) ;; esac ]) dnl CURL_CHECK_OPTION_WARNINGS dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-warnings or --disable-warnings, and set dnl shell variable want_warnings as appropriate. AC_DEFUN([CURL_CHECK_OPTION_WARNINGS], [ AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl AC_BEFORE([$0],[CURL_CHECK_OPTION_WERROR])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable strict compiler warnings]) OPT_COMPILER_WARNINGS="default" AC_ARG_ENABLE(warnings, AS_HELP_STRING([--enable-warnings],[Enable strict compiler warnings]) AS_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]), OPT_COMPILER_WARNINGS=$enableval) case "$OPT_COMPILER_WARNINGS" in no) dnl --disable-warnings option used want_warnings="no" ;; default) dnl configure option not specified, so dnl use same setting as --enable-debug want_warnings="$want_debug" ;; *) dnl --enable-warnings option used want_warnings="yes" ;; esac AC_MSG_RESULT([$want_warnings]) ]) dnl CURL_CHECK_OPTION_WERROR dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-werror or --disable-werror, and set dnl shell variable want_werror as appropriate. AC_DEFUN([CURL_CHECK_OPTION_WERROR], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER])dnl AC_MSG_CHECKING([whether to enable compiler warnings as errors]) OPT_COMPILER_WERROR="default" AC_ARG_ENABLE(werror, AS_HELP_STRING([--enable-werror],[Enable compiler warnings as errors]) AS_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]), OPT_COMPILER_WERROR=$enableval) case "$OPT_COMPILER_WERROR" in no) dnl --disable-werror option used want_werror="no" ;; default) dnl configure option not specified want_werror="no" ;; *) dnl --enable-werror option used want_werror="yes" ;; esac AC_MSG_RESULT([$want_werror]) ]) dnl CURL_CHECK_NONBLOCKING_SOCKET dnl ------------------------------------------------- dnl Check for how to set a socket into non-blocking state. AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET], [ AC_REQUIRE([CURL_CHECK_FUNC_FCNTL])dnl AC_REQUIRE([CURL_CHECK_FUNC_IOCTLSOCKET])dnl AC_REQUIRE([CURL_CHECK_FUNC_IOCTLSOCKET_CAMEL])dnl # tst_method="unknown" AC_MSG_CHECKING([how to set a socket into non-blocking mode]) if test "x$curl_cv_func_fcntl_o_nonblock" = "xyes"; then tst_method="fcntl O_NONBLOCK" elif test "x$curl_cv_func_ioctl_fionbio" = "xyes"; then tst_method="ioctl FIONBIO" elif test "x$curl_cv_func_ioctlsocket_fionbio" = "xyes"; then tst_method="ioctlsocket FIONBIO" elif test "x$curl_cv_func_ioctlsocket_camel_fionbio" = "xyes"; then tst_method="IoctlSocket FIONBIO" elif test "x$curl_cv_func_setsockopt_so_nonblock" = "xyes"; then tst_method="setsockopt SO_NONBLOCK" fi AC_MSG_RESULT([$tst_method]) if test "$tst_method" = "unknown"; then AC_MSG_WARN([cannot determine non-blocking socket method.]) fi ]) dnl CURL_CONFIGURE_SYMBOL_HIDING dnl ------------------------------------------------- dnl Depending on --enable-symbol-hiding or --disable-symbol-hiding dnl configure option, and compiler capability to actually honor such dnl option, this will modify compiler flags as appropriate and also dnl provide needed definitions for configuration and Makefile.am files. dnl This macro should not be used until all compilation tests have dnl been done to prevent interferences on other tests. AC_DEFUN([CURL_CONFIGURE_SYMBOL_HIDING], [ AC_MSG_CHECKING([whether hiding of library internal symbols will actually happen]) CFLAG_CURL_SYMBOL_HIDING="" doing_symbol_hiding="no" if test "$want_symbol_hiding" = "yes" && test "$supports_symbol_hiding" = "yes"; then doing_symbol_hiding="yes" CFLAG_CURL_SYMBOL_HIDING="$symbol_hiding_CFLAGS" AC_DEFINE_UNQUOTED(CURL_EXTERN_SYMBOL, $symbol_hiding_EXTERN, [Definition to make a library symbol externally visible.]) AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AM_CONDITIONAL(DOING_CURL_SYMBOL_HIDING, test x$doing_symbol_hiding = xyes) AC_SUBST(CFLAG_CURL_SYMBOL_HIDING) ]) dnl CURL_CHECK_LIB_ARES dnl ------------------------------------------------- dnl When c-ares library support has been requested, dnl performs necessary checks and adjustsments needed dnl to enable support of this library. AC_DEFUN([CURL_CHECK_LIB_ARES], [ # if test "$want_ares" = "yes"; then dnl c-ares library support has been requested clean_CPPFLAGS="$CPPFLAGS" clean_LDFLAGS="$LDFLAGS" clean_LIBS="$LIBS" configure_runpath=`pwd` if test -n "$want_ares_path"; then dnl c-ares library path has been specified ARES_PCDIR="$want_ares_path/lib/pkgconfig" CURL_CHECK_PKGCONFIG(libcares, [$ARES_PCDIR]) if test "$PKGCONFIG" != "no" ; then ares_LIBS=`CURL_EXPORT_PCDIR([$ARES_PCDIR]) $PKGCONFIG --libs-only-l libcares` ares_LDFLAGS=`CURL_EXPORT_PCDIR([$ARES_PCDIR]) $PKGCONFIG --libs-only-L libcares` ares_CPPFLAGS=`CURL_EXPORT_PCDIR([$ARES_PCDIR]) $PKGCONFIG --cflags-only-I libcares` AC_MSG_NOTICE([pkg-config: ares LIBS: "$ares_LIBS"]) AC_MSG_NOTICE([pkg-config: ares LDFLAGS: "$ares_LDFLAGS"]) AC_MSG_NOTICE([pkg-config: ares CPPFLAGS: "$ares_CPPFLAGS"]) else dnl ... path without pkg-config ares_CPPFLAGS="-I$want_ares_path/include" ares_LDFLAGS="-L$want_ares_path/lib" ares_LIBS="-lcares" fi else dnl c-ares path not specified, use defaults CURL_CHECK_PKGCONFIG(libcares) if test "$PKGCONFIG" != "no" ; then ares_LIBS=`$PKGCONFIG --libs-only-l libcares` ares_LDFLAGS=`$PKGCONFIG --libs-only-L libcares` ares_CPPFLAGS=`$PKGCONFIG --cflags-only-I libcares` AC_MSG_NOTICE([pkg-config: ares_LIBS: "$ares_LIBS"]) AC_MSG_NOTICE([pkg-config: ares_LDFLAGS: "$ares_LDFLAGS"]) AC_MSG_NOTICE([pkg-config: ares_CPPFLAGS: "$ares_CPPFLAGS"]) else ares_CPPFLAGS="" ares_LDFLAGS="" ares_LIBS="-lcares" fi fi # CPPFLAGS="$clean_CPPFLAGS $ares_CPPFLAGS" LDFLAGS="$clean_LDFLAGS $ares_LDFLAGS" LIBS="$ares_LIBS $clean_LIBS" # dnl check if c-ares new enough AC_MSG_CHECKING([that c-ares is good and recent enough]) AC_LINK_IFELSE([ AC_LANG_PROGRAM([[ #include /* set of dummy functions in case c-ares was built with debug */ void curl_dofree() { } void curl_sclose() { } void curl_domalloc() { } void curl_docalloc() { } void curl_socket() { } ]],[[ ares_channel channel; ares_cancel(channel); /* added in 1.2.0 */ ares_process_fd(channel, 0, 0); /* added in 1.4.0 */ ares_dup(&channel, channel); /* added in 1.6.0 */ ]]) ],[ AC_MSG_RESULT([yes]) ],[ AC_MSG_RESULT([no]) AC_MSG_ERROR([c-ares library defective or too old]) dnl restore initial settings CPPFLAGS="$clean_CPPFLAGS" LDFLAGS="$clean_LDFLAGS" LIBS="$clean_LIBS" # prevent usage want_ares="no" ]) if test "$want_ares" = "yes"; then dnl finally c-ares will be used AC_DEFINE(USE_ARES, 1, [Define to enable c-ares support]) AC_SUBST([USE_ARES], [1]) curl_res_msg="c-ares" fi fi ]) dnl CURL_CHECK_OPTION_NTLM_WB dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-ntlm-wb or --disable-ntlm-wb, and set dnl shell variable want_ntlm_wb and want_ntlm_wb_file dnl as appropriate. AC_DEFUN([CURL_CHECK_OPTION_NTLM_WB], [ AC_BEFORE([$0],[CURL_CHECK_NTLM_WB])dnl OPT_NTLM_WB="default" AC_ARG_ENABLE(ntlm-wb, AS_HELP_STRING([--enable-ntlm-wb@<:@=FILE@:>@],[Enable NTLM delegation to winbind's ntlm_auth helper, where FILE is ntlm_auth's absolute filename (default: /usr/bin/ntlm_auth)]) AS_HELP_STRING([--disable-ntlm-wb],[Disable NTLM delegation to winbind's ntlm_auth helper]), OPT_NTLM_WB=$enableval) want_ntlm_wb_file="/usr/bin/ntlm_auth" case "$OPT_NTLM_WB" in no) dnl --disable-ntlm-wb option used want_ntlm_wb="no" ;; default) dnl configure option not specified want_ntlm_wb="yes" ;; *) dnl --enable-ntlm-wb option used want_ntlm_wb="yes" if test -n "$enableval" && test "$enableval" != "yes"; then want_ntlm_wb_file="$enableval" fi ;; esac ]) dnl CURL_CHECK_NTLM_WB dnl ------------------------------------------------- dnl Check if support for NTLM delegation to winbind's dnl ntlm_auth helper will finally be enabled depending dnl on given configure options and target platform. AC_DEFUN([CURL_CHECK_NTLM_WB], [ AC_REQUIRE([CURL_CHECK_OPTION_NTLM_WB])dnl AC_REQUIRE([CURL_CHECK_NATIVE_WINDOWS])dnl AC_MSG_CHECKING([whether to enable NTLM delegation to winbind's helper]) if test "$curl_cv_native_windows" = "yes" || test "x$SSL_ENABLED" = "x"; then want_ntlm_wb_file="" want_ntlm_wb="no" elif test "x$ac_cv_func_fork" != "xyes"; then dnl ntlm_wb requires fork want_ntlm_wb="no" fi AC_MSG_RESULT([$want_ntlm_wb]) if test "$want_ntlm_wb" = "yes"; then AC_DEFINE(NTLM_WB_ENABLED, 1, [Define to enable NTLM delegation to winbind's ntlm_auth helper.]) AC_DEFINE_UNQUOTED(NTLM_WB_FILE, "$want_ntlm_wb_file", [Define absolute filename for winbind's ntlm_auth helper.]) NTLM_WB_ENABLED=1 fi ]) dnl CURL_CHECK_OPTION_ECH dnl ----------------------------------------------------- dnl Verify whether configure has been invoked with option dnl --enable-ech or --disable-ech, and set dnl shell variable want_ech as appropriate. AC_DEFUN([CURL_CHECK_OPTION_ECH], [ AC_MSG_CHECKING([whether to enable ECH support]) OPT_ECH="default" AC_ARG_ENABLE(ech, AS_HELP_STRING([--enable-ech],[Enable ECH support]) AS_HELP_STRING([--disable-ech],[Disable ECH support]), OPT_ECH=$enableval) case "$OPT_ECH" in no) dnl --disable-ech option used want_ech="no" curl_ech_msg="no (--enable-ech)" AC_MSG_RESULT([no]) ;; default) dnl configure option not specified want_ech="no" curl_ech_msg="no (--enable-ech)" AC_MSG_RESULT([no]) ;; *) dnl --enable-ech option used want_ech="yes" curl_ech_msg="enabled (--disable-ech)" experimental="ech" AC_MSG_RESULT([yes]) ;; esac ])