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Since this is the case, all we can really # say is unknown -- it depends on the patch being installed. If # it is, this changes to 'yes'. Without it, it would be 'no'. lt_cv_sys_dlopen_deplibs=unknown ;; osf*) # the two cases above should catch all versions of osf <= 5.1. Read # the comments above for what we know about them. # At > 5.1, deplibs are loaded *and* any RPATH in a shared library # is used to find them so we can finally say 'yes'. lt_cv_sys_dlopen_deplibs=yes ;; qnx*) lt_cv_sys_dlopen_deplibs=yes ;; solaris*) lt_cv_sys_dlopen_deplibs=yes ;; sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*) libltdl_cv_sys_dlopen_deplibs=yes ;; esac ]) if test yes != "$lt_cv_sys_dlopen_deplibs"; then AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1], [Define if the OS needs help to load dependent libraries for dlopen().]) fi ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:546: -1- AU_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [m4_if($#, 0, [LT_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:546: -1- AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [m4_warn([obsolete], [The macro `AC_LTDL_SYS_DLOPEN_DEPLIBS' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:553: -1- AC_DEFUN([LT_SYS_MODULE_EXT], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl AC_CACHE_CHECK([what extension is used for runtime loadable modules], [libltdl_cv_shlibext], [ module=yes eval libltdl_cv_shlibext=$shrext_cmds module=no eval libltdl_cv_shrext=$shrext_cmds ]) if test -n "$libltdl_cv_shlibext"; then m4_pattern_allow([LT_MODULE_EXT])dnl AC_DEFINE_UNQUOTED([LT_MODULE_EXT], ["$libltdl_cv_shlibext"], [Define to the extension used for runtime loadable modules, say, ".so".]) fi if test "$libltdl_cv_shrext" != "$libltdl_cv_shlibext"; then m4_pattern_allow([LT_SHARED_EXT])dnl AC_DEFINE_UNQUOTED([LT_SHARED_EXT], ["$libltdl_cv_shrext"], [Define to the shared library suffix, say, ".dylib".]) fi if test -n "$shared_archive_member_spec"; then m4_pattern_allow([LT_SHARED_LIB_MEMBER])dnl AC_DEFINE_UNQUOTED([LT_SHARED_LIB_MEMBER], ["($shared_archive_member_spec.o)"], [Define to the shared archive member specification, say "(shr.o)".]) fi ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:581: -1- AU_DEFUN([AC_LTDL_SHLIBEXT], [m4_if($#, 0, [LT_SYS_MODULE_EXT], [LT_SYS_MODULE_EXT($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:581: -1- AC_DEFUN([AC_LTDL_SHLIBEXT], [m4_warn([obsolete], [The macro `AC_LTDL_SHLIBEXT' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_SYS_MODULE_EXT], [LT_SYS_MODULE_EXT($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:588: -1- AC_DEFUN([LT_SYS_MODULE_PATH], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl AC_CACHE_CHECK([what variable specifies run-time module search path], [lt_cv_module_path_var], [lt_cv_module_path_var=$shlibpath_var]) if test -n "$lt_cv_module_path_var"; then m4_pattern_allow([LT_MODULE_PATH_VAR])dnl AC_DEFINE_UNQUOTED([LT_MODULE_PATH_VAR], ["$lt_cv_module_path_var"], [Define to the name of the environment variable that determines the run-time module search path.]) fi ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:600: -1- AU_DEFUN([AC_LTDL_SHLIBPATH], [m4_if($#, 0, [LT_SYS_MODULE_PATH], [LT_SYS_MODULE_PATH($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:600: -1- AC_DEFUN([AC_LTDL_SHLIBPATH], [m4_warn([obsolete], [The macro `AC_LTDL_SHLIBPATH' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_SYS_MODULE_PATH], [LT_SYS_MODULE_PATH($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:607: -1- AC_DEFUN([LT_SYS_DLSEARCH_PATH], [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl AC_CACHE_CHECK([for the default library search path], [lt_cv_sys_dlsearch_path], [lt_cv_sys_dlsearch_path=$sys_lib_dlsearch_path_spec]) if test -n "$lt_cv_sys_dlsearch_path"; then sys_dlsearch_path= for dir in $lt_cv_sys_dlsearch_path; do if test -z "$sys_dlsearch_path"; then sys_dlsearch_path=$dir else sys_dlsearch_path=$sys_dlsearch_path$PATH_SEPARATOR$dir fi done m4_pattern_allow([LT_DLSEARCH_PATH])dnl AC_DEFINE_UNQUOTED([LT_DLSEARCH_PATH], ["$sys_dlsearch_path"], [Define to the system default library search path.]) fi ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:628: -1- AU_DEFUN([AC_LTDL_SYSSEARCHPATH], [m4_if($#, 0, [LT_SYS_DLSEARCH_PATH], [LT_SYS_DLSEARCH_PATH($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:628: -1- AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [m4_warn([obsolete], [The macro `AC_LTDL_SYSSEARCHPATH' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_SYS_DLSEARCH_PATH], [LT_SYS_DLSEARCH_PATH($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:654: -1- AC_DEFUN([LT_LIB_DLLOAD], [m4_pattern_allow([^LT_DLLOADERS$]) LT_DLLOADERS= AC_SUBST([LT_DLLOADERS]) AC_LANG_PUSH([C]) lt_dlload_save_LIBS=$LIBS LIBADD_DLOPEN= AC_SEARCH_LIBS([dlopen], [dl], [AC_DEFINE([HAVE_LIBDL], [1], [Define if you have the libdl library or equivalent.]) if test "$ac_cv_search_dlopen" != "none required"; then LIBADD_DLOPEN=-ldl fi libltdl_cv_lib_dl_dlopen=yes LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_DLFCN_H # include #endif ]], [[dlopen(0, 0);]])], [AC_DEFINE([HAVE_LIBDL], [1], [Define if you have the libdl library or equivalent.]) libltdl_cv_func_dlopen=yes LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"], [AC_CHECK_LIB([svld], [dlopen], [AC_DEFINE([HAVE_LIBDL], [1], [Define if you have the libdl library or equivalent.]) LIBADD_DLOPEN=-lsvld libltdl_cv_func_dlopen=yes LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"])])]) if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen" then lt_save_LIBS=$LIBS LIBS="$LIBS $LIBADD_DLOPEN" AC_CHECK_FUNCS([dlerror]) LIBS=$lt_save_LIBS fi AC_SUBST([LIBADD_DLOPEN]) LIBADD_SHL_LOAD= AC_CHECK_FUNC([shl_load], [AC_DEFINE([HAVE_SHL_LOAD], [1], [Define if you have the shl_load function.]) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"], [AC_CHECK_LIB([dld], [shl_load], [AC_DEFINE([HAVE_SHL_LOAD], [1], [Define if you have the shl_load function.]) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la" LIBADD_SHL_LOAD=-ldld])]) AC_SUBST([LIBADD_SHL_LOAD]) case $host_os in darwin[[1567]].*) # We only want this for pre-Mac OS X 10.4. AC_CHECK_FUNC([_dyld_func_lookup], [AC_DEFINE([HAVE_DYLD], [1], [Define if you have the _dyld_func_lookup function.]) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dyld.la"]) ;; beos*) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}load_add_on.la" ;; cygwin* | mingw* | pw32*) AC_CHECK_DECLS([cygwin_conv_path], [], [], [[#include ]]) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}loadlibrary.la" ;; esac AC_CHECK_LIB([dld], [dld_link], [AC_DEFINE([HAVE_DLD], [1], [Define if you have the GNU dld library.]) LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dld_link.la"]) AC_SUBST([LIBADD_DLD_LINK]) m4_pattern_allow([^LT_DLPREOPEN$]) LT_DLPREOPEN= if test -n "$LT_DLLOADERS" then for lt_loader in $LT_DLLOADERS; do LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen $lt_loader " done AC_DEFINE([HAVE_LIBDLLOADER], [1], [Define if libdlloader will be built on this platform]) fi AC_SUBST([LT_DLPREOPEN]) dnl This isn't used anymore, but set it for backwards compatibility LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD" AC_SUBST([LIBADD_DL]) LIBS=$lt_dlload_save_LIBS AC_LANG_POP ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:749: -1- AU_DEFUN([AC_LTDL_DLLIB], [m4_if($#, 0, [LT_LIB_DLLOAD], [LT_LIB_DLLOAD($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:749: -1- AC_DEFUN([AC_LTDL_DLLIB], [m4_warn([obsolete], [The macro `AC_LTDL_DLLIB' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_LIB_DLLOAD], [LT_LIB_DLLOAD($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:757: -1- AC_DEFUN([LT_SYS_SYMBOL_USCORE], [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl AC_CACHE_CHECK([for _ prefix in compiled symbols], [lt_cv_sys_symbol_underscore], [lt_cv_sys_symbol_underscore=no cat > conftest.$ac_ext <<_LT_EOF void nm_test_func(){} int main(){nm_test_func;return 0;} _LT_EOF if AC_TRY_EVAL(ac_compile); then # Now try to grab the symbols. ac_nlist=conftest.nm if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then # See whether the symbols have a leading underscore. if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then lt_cv_sys_symbol_underscore=yes else if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then : else echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD fi fi else echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD fi else echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD cat conftest.c >&AS_MESSAGE_LOG_FD fi rm -rf conftest* ]) sys_symbol_underscore=$lt_cv_sys_symbol_underscore AC_SUBST([sys_symbol_underscore]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:794: -1- AU_DEFUN([AC_LTDL_SYMBOL_USCORE], [m4_if($#, 0, [LT_SYS_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:794: -1- AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [m4_warn([obsolete], [The macro `AC_LTDL_SYMBOL_USCORE' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_SYS_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:801: -1- AC_DEFUN([LT_FUNC_DLSYM_USCORE], [AC_REQUIRE([_LT_COMPILER_PIC])dnl for lt_prog_compiler_wl AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl for lt_cv_sys_symbol_underscore AC_REQUIRE([LT_SYS_MODULE_EXT])dnl for libltdl_cv_shlibext if test yes = "$lt_cv_sys_symbol_underscore"; then if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen"; then AC_CACHE_CHECK([whether we have to add an underscore for dlsym], [libltdl_cv_need_uscore], [libltdl_cv_need_uscore=unknown dlsym_uscore_save_LIBS=$LIBS LIBS="$LIBS $LIBADD_DLOPEN" libname=conftmod # stay within 8.3 filename limits! cat >$libname.$ac_ext <<_LT_EOF [#line $LINENO "configure" #include "confdefs.h" /* When -fvisibility=hidden is used, assume the code has been annotated correspondingly for the symbols needed. */ #if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3)) int fnord () __attribute__((visibility("default"))); #endif int fnord () { return 42; }] _LT_EOF # ltfn_module_cmds module_cmds # Execute tilde-delimited MODULE_CMDS with environment primed for # $module_cmds or $archive_cmds type content. ltfn_module_cmds () {( # subshell avoids polluting parent global environment module_cmds_save_ifs=$IFS; IFS='~' for cmd in @S|@1; do IFS=$module_cmds_save_ifs libobjs=$libname.$ac_objext; lib=$libname$libltdl_cv_shlibext rpath=/not-exists; soname=$libname$libltdl_cv_shlibext; output_objdir=. major=; versuffix=; verstring=; deplibs= ECHO=echo; wl=$lt_prog_compiler_wl; allow_undefined_flag= eval $cmd done IFS=$module_cmds_save_ifs )} # Compile a loadable module using libtool macro expansion results. $CC $pic_flag -c $libname.$ac_ext ltfn_module_cmds "${module_cmds:-$archive_cmds}" # Try to fetch fnord with dlsym(). libltdl_dlunknown=0; libltdl_dlnouscore=1; libltdl_dluscore=2 cat >conftest.$ac_ext <<_LT_EOF [#line $LINENO "configure" #include "confdefs.h" #if HAVE_DLFCN_H #include #endif #include #ifndef RTLD_GLOBAL # ifdef DL_GLOBAL # define RTLD_GLOBAL DL_GLOBAL # else # define RTLD_GLOBAL 0 # endif #endif #ifndef RTLD_NOW # ifdef DL_NOW # define RTLD_NOW DL_NOW # else # define RTLD_NOW 0 # endif #endif int main () { void *handle = dlopen ("`pwd`/$libname$libltdl_cv_shlibext", RTLD_GLOBAL|RTLD_NOW); int status = $libltdl_dlunknown; if (handle) { if (dlsym (handle, "fnord")) status = $libltdl_dlnouscore; else { if (dlsym (handle, "_fnord")) status = $libltdl_dluscore; else puts (dlerror ()); } dlclose (handle); } else puts (dlerror ()); return status; }] _LT_EOF if AC_TRY_EVAL(ac_link) && test -s "conftest$ac_exeext" 2>/dev/null; then (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null libltdl_status=$? case x$libltdl_status in x$libltdl_dlnouscore) libltdl_cv_need_uscore=no ;; x$libltdl_dluscore) libltdl_cv_need_uscore=yes ;; x*) libltdl_cv_need_uscore=unknown ;; esac fi rm -rf conftest* $libname* LIBS=$dlsym_uscore_save_LIBS ]) fi fi if test yes = "$libltdl_cv_need_uscore"; then AC_DEFINE([NEED_USCORE], [1], [Define if dlsym() requires a leading underscore in symbol names.]) fi ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:908: -1- AU_DEFUN([AC_LTDL_DLSYM_USCORE], [m4_if($#, 0, [LT_FUNC_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE($@)])], [], []) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltdl.m4:908: -1- AC_DEFUN([AC_LTDL_DLSYM_USCORE], [m4_warn([obsolete], [The macro `AC_LTDL_DLSYM_USCORE' is obsolete. You should run autoupdate.])dnl m4_if($#, 0, [LT_FUNC_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE($@)])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:14: -1- AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:113: -1- AU_DEFUN([AC_LIBTOOL_DLOPEN], [_LT_SET_OPTION([LT_INIT], [dlopen]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the 'dlopen' option into LT_INIT's first parameter.]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:113: -1- AC_DEFUN([AC_LIBTOOL_DLOPEN], [m4_warn([obsolete], [The macro `AC_LIBTOOL_DLOPEN' is obsolete. You should run autoupdate.])dnl _LT_SET_OPTION([LT_INIT], [dlopen]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the 'dlopen' option into LT_INIT's first parameter.]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:148: -1- AU_DEFUN([AC_LIBTOOL_WIN32_DLL], [AC_REQUIRE([AC_CANONICAL_HOST])dnl _LT_SET_OPTION([LT_INIT], [win32-dll]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the 'win32-dll' option into LT_INIT's first parameter.]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:148: -1- AC_DEFUN([AC_LIBTOOL_WIN32_DLL], [m4_warn([obsolete], [The macro `AC_LIBTOOL_WIN32_DLL' is obsolete. You should run autoupdate.])dnl AC_REQUIRE([AC_CANONICAL_HOST])dnl _LT_SET_OPTION([LT_INIT], [win32-dll]) AC_DIAGNOSE([obsolete], [$0: Remove this warning and the call to _LT_SET_OPTION when you put the 'win32-dll' option into LT_INIT's first parameter.]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:197: -1- AC_DEFUN([AC_ENABLE_SHARED], [_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:201: -1- AC_DEFUN([AC_DISABLE_SHARED], [_LT_SET_OPTION([LT_INIT], [disable-shared]) ]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:205: -1- AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)]) m4trace:/home/user/openwrt23.05.3-lime2024-Ramips/staging_dir/host/share/aclocal/ltoptions.m4:205: -1- AC_DEFUN([AM_ENABLE_SHARED], [m4_warn([obsolete], [The macro `AM_ENABLE_SHARED' is obsolete. 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AC_REQUIRE([AC_OBJEXT]) AC_REQUIRE([MPFR_CHECK_LIBM]) AC_REQUIRE([MPFR_CHECK_LIBQUADMATH]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl Features for the MPFR shared cache. This needs to be done dnl quite early since this may change CC, CFLAGS and LIBS, which dnl may affect the other tests. if test "$enable_shared_cache" = yes; then dnl Prefer ISO C11 threads (as in mpfr-thread.h). MPFR_CHECK_C11_THREAD() if test "$mpfr_c11_thread_ok" != yes; then dnl Check for POSIX threads. Since the AX_PTHREAD macro is not standard dnl (it is provided by autoconf-archive), we need to detect whether it dnl is left unexpanded, otherwise the configure script won't fail and dnl "make distcheck" won't give any error, yielding buggy tarballs! dnl The \b is necessary to avoid an error with recent ax_pthread.m4 dnl (such as with Debian's autoconf-archive 20160320-1), which contains dnl AX_PTHREAD_ZOS_MISSING, etc. It is not documented, but see: dnl https://lists.gnu.org/archive/html/autoconf/2015-03/msg00011.html dnl dnl AX_PTHREAD is now in the MPFR repository (m4/ax_pthread.m4), but we dnl should leave this test, just in case there is some issue loading it dnl (or any other reason). dnl dnl Note: each time a change is done in m4_pattern_forbid, autogen.sh dnl should be tested with and without ax_pthread.m4 availability (in dnl the latter case, there should be an error). m4_pattern_forbid([AX_PTHREAD\b]) AX_PTHREAD([]) if test "$ax_pthread_ok" = yes; then CC="$PTHREAD_CC" CXX="$PTHREAD_CXX" CFLAGS="$CFLAGS $PTHREAD_CFLAGS" CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS" LIBS="$LIBS $PTHREAD_LIBS" dnl Do a compilation test, as this is currently not done by AX_PTHREAD. dnl Moreover, MPFR needs pthread_rwlock_t, which is conditionally defined dnl in glibc's bits/pthreadtypes.h (via ), not sure why... AC_MSG_CHECKING([for pthread_rwlock_t]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include ]], [[ pthread_rwlock_t lock; (void) lock; ]])], [AC_MSG_RESULT([yes]) mpfr_pthread_ok=yes], [AC_MSG_RESULT([no]) mpfr_pthread_ok=no]) else mpfr_pthread_ok=no fi fi AC_MSG_CHECKING(if shared cache can be supported) if test "$mpfr_c11_thread_ok" = yes; then AC_MSG_RESULT([yes, with ISO C11 threads]) elif test "$mpfr_pthread_ok" = yes; then AC_MSG_RESULT([yes, with pthread]) else AC_MSG_RESULT(no) AC_MSG_ERROR([shared cache needs C11 threads or pthread support]) fi fi dnl End of features for the MPFR shared cache. AC_CHECK_HEADER([limits.h],, AC_MSG_ERROR([limits.h not found])) AC_CHECK_HEADER([float.h],, AC_MSG_ERROR([float.h not found])) AC_CHECK_HEADER([string.h],, AC_MSG_ERROR([string.h not found])) dnl Check for locales AC_CHECK_HEADERS([locale.h]) dnl Check for wide characters (wchar_t and wint_t) AC_CHECK_HEADERS([wchar.h]) dnl Check for stdargs AC_CHECK_HEADER([stdarg.h],[AC_DEFINE([HAVE_STDARG],1,[Define if stdarg])], [AC_CHECK_HEADER([varargs.h],, AC_MSG_ERROR([stdarg.h or varargs.h not found]))]) dnl sys/fpu.h - MIPS specific AC_CHECK_HEADERS([sys/fpu.h]) dnl Android has a , but not the following members. AC_CHECK_MEMBERS([struct lconv.decimal_point, struct lconv.thousands_sep],,, [#include ]) dnl Check how to get `alloca' AC_FUNC_ALLOCA dnl Define uintptr_t if not available. AC_TYPE_UINTPTR_T dnl va_copy macro AC_MSG_CHECKING([how to copy va_list]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include ]], [[ va_list ap1, ap2; va_copy(ap1, ap2); ]])], [ AC_MSG_RESULT([va_copy]) AC_DEFINE(HAVE_VA_COPY) ], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include ]], [[ va_list ap1, ap2; __va_copy(ap1, ap2); ]])], [AC_DEFINE([HAVE___VA_COPY]) AC_MSG_RESULT([__va_copy])], [AC_MSG_RESULT([memcpy])])]) dnl Options like -Werror can yield a failure as AC_CHECK_FUNCS uses some dnl fixed prototype for function detection, generally incompatible with dnl the standard one. For instance, with GCC, if the function is defined dnl as a builtin, one can get a "conflicting types for built-in function" dnl error [-Werror=builtin-declaration-mismatch], even though the header dnl is not included; when these functions were tested, this occurred with dnl memmove and memset. Even though no failures are known with the tested dnl functions at this time, let's remove options starting with "-Werror" dnl since failures may still be possible. dnl dnl The gettimeofday function is not defined with MinGW. saved_CFLAGS="$CFLAGS" CFLAGS=`[echo " $CFLAGS" | $SED 's/ -Werror[^ ]*//g']` AC_CHECK_FUNCS([setlocale gettimeofday signal]) CFLAGS="$saved_CFLAGS" dnl We cannot use AC_CHECK_FUNCS on sigaction, because while this dnl function may be provided by the C library, its prototype and dnl associated structure may not be available, e.g. when compiling dnl with "gcc -std=c99". AC_MSG_CHECKING(for sigaction and its associated structure) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (int (*func)(int, const struct sigaction *, struct sigaction *)) { return 0; } ]], [[ return f(sigaction); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_SIGACTION, 1, [Define if you have a working sigaction function.]) ],[AC_MSG_RESULT(no)]) dnl check for long long AC_CHECK_TYPE([long long int], AC_DEFINE(HAVE_LONG_LONG, 1, [Define if compiler supports long long]),,) dnl intmax_t is C99 AC_CHECK_TYPES([intmax_t]) if test "$ac_cv_type_intmax_t" = yes; then AC_CACHE_CHECK([for working INTMAX_MAX], mpfr_cv_have_intmax_max, [ saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src -DMPFR_NEED_INTMAX_H" AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [[#include "mpfr-intmax.h"]], [[intmax_t x = INTMAX_MAX; (void) x;]] )], mpfr_cv_have_intmax_max=yes, mpfr_cv_have_intmax_max=no) CPPFLAGS="$saved_CPPFLAGS" ]) if test "$mpfr_cv_have_intmax_max" = "yes"; then AC_DEFINE(MPFR_HAVE_INTMAX_MAX,1,[Define if you have a working INTMAX_MAX.]) fi fi AC_CHECK_TYPE( [union fpc_csr], AC_DEFINE(HAVE_FPC_CSR,1,[Define if union fpc_csr is available]), , [ #if HAVE_SYS_FPU_H # include #endif ]) dnl Check for _Noreturn function specifier (ISO C11) AC_CACHE_CHECK([for _Noreturn], mpfr_cv_have_noreturn, [ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[_Noreturn void foo(int);]])], mpfr_cv_have_noreturn=yes, mpfr_cv_have_noreturn=no) ]) if test "$mpfr_cv_have_noreturn" = "yes"; then AC_DEFINE(MPFR_HAVE_NORETURN,1,[Define if the _Noreturn function specifier is supported.]) fi dnl Check for __builtin_unreachable AC_CACHE_CHECK([for __builtin_unreachable], mpfr_cv_have_builtin_unreachable, [ AC_LINK_IFELSE([AC_LANG_PROGRAM( [[int x;]], [[if (x) __builtin_unreachable(); ]] )], mpfr_cv_have_builtin_unreachable=yes, mpfr_cv_have_builtin_unreachable=no) ]) if test "$mpfr_cv_have_builtin_unreachable" = "yes"; then AC_DEFINE(MPFR_HAVE_BUILTIN_UNREACHABLE, 1, [Define if the __builtin_unreachable GCC built-in is supported.]) fi dnl Check for attribute constructor and destructor MPFR_CHECK_CONSTRUCTOR_ATTR() dnl Check for fesetround AC_CACHE_CHECK([for fesetround], mpfr_cv_have_fesetround, [ saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include ]], [[fesetround(FE_TONEAREST);]])], mpfr_cv_have_fesetround=yes, mpfr_cv_have_fesetround=no) LIBS="$saved_LIBS" ]) if test "$mpfr_cv_have_fesetround" = "yes"; then AC_DEFINE(MPFR_HAVE_FESETROUND,1,[Define if you have the `fesetround' function via the header file.]) fi dnl Check for gcc float-conversion bug; if need be, -ffloat-store is used to dnl force the conversion to the destination type when a value is stored to dnl a variable (see ISO C99 standard 5.1.2.3#13, 6.3.1.5#2, 6.3.1.8#2). This dnl is important concerning the exponent range. Note that this doesn't solve dnl the double-rounding problem. if test -n "$GCC"; then AC_CACHE_CHECK([for gcc float-conversion bug], mpfr_cv_gcc_floatconv_bug, [ saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #ifdef MPFR_HAVE_FESETROUND #include #endif static double get_max (void); int main (void) { double x = 0.5; double y; int i; for (i = 1; i <= 11; i++) x *= x; if (x != 0) return 1; #ifdef MPFR_HAVE_FESETROUND /* Useful test for the G4 PowerPC */ fesetround(FE_TOWARDZERO); x = y = get_max (); x *= 2.0; if (x != y) return 1; #endif return 0; } static double get_max (void) { static volatile double d = DBL_MAX; return d; } ]])], [mpfr_cv_gcc_floatconv_bug="no"], [mpfr_cv_gcc_floatconv_bug="yes, use -ffloat-store"], [mpfr_cv_gcc_floatconv_bug="cannot test, use -ffloat-store"]) LIBS="$saved_LIBS" ]) if test "$mpfr_cv_gcc_floatconv_bug" != "no"; then CFLAGS="$CFLAGS -ffloat-store" fi fi dnl Check if subnormal numbers are supported. dnl For the binary64 format, the smallest normal number is 2^(-1022). dnl For the binary32 format, the smallest normal number is 2^(-126). dnl Do not use the corresponding HAVE_SUBNORM_* macros as they dnl are not available when cross-compiling. For the tests, use dnl the have_subnorm_* functions if need be. dnl Note: "volatile" is needed to avoid -ffast-math optimizations dnl (default in icx 2021.2.0, which also sets the FZ and DAZ bits dnl of the x86-64 MXCSR register to disregard subnormals). AC_CACHE_CHECK([for subnormal double-precision numbers], mpfr_cv_have_subnorm_dbl, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include int main (void) { volatile double x = 2.22507385850720138309e-308, y; y = x / 2.0; fprintf (stderr, "%e\n", y); return 2.0 * y != x; } ]])], [mpfr_cv_have_subnorm_dbl="yes"], [mpfr_cv_have_subnorm_dbl="no"], [mpfr_cv_have_subnorm_dbl="cannot test, assume no"]) ]) if test "$mpfr_cv_have_subnorm_dbl" = "yes"; then AC_DEFINE(HAVE_SUBNORM_DBL, 1, [Define if the double type fully supports subnormals.]) fi AC_CACHE_CHECK([for subnormal single-precision numbers], mpfr_cv_have_subnorm_flt, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include int main (void) { volatile float x = 1.17549435082229e-38, y; y = x / 2.0f; fprintf (stderr, "%e\n", (double) y); return 2.0f * y != x; } ]])], [mpfr_cv_have_subnorm_flt="yes"], [mpfr_cv_have_subnorm_flt="no"], [mpfr_cv_have_subnorm_flt="cannot test, assume no"]) ]) if test "$mpfr_cv_have_subnorm_flt" = "yes"; then AC_DEFINE(HAVE_SUBNORM_FLT, 1, [Define if the float type fully supports subnormals.]) fi dnl Check if signed zeros are supported. Note: the test will fail dnl if the division by 0 generates a trap. AC_CACHE_CHECK([for signed zeros], mpfr_cv_have_signedz, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ int main (void) { return 1.0 / 0.0 == 1.0 / -0.0; } ]])], [mpfr_cv_have_signedz="yes"], [mpfr_cv_have_signedz="no"], [mpfr_cv_have_signedz="cannot test, assume no"]) ]) if test "$mpfr_cv_have_signedz" = "yes"; then AC_DEFINE(HAVE_SIGNEDZ,1,[Define if signed zeros are supported.]) fi dnl Check the FP division by 0 fails (e.g. on a non-IEEE-754 platform). dnl In such a case, MPFR_ERRDIVZERO is defined to disable the tests dnl involving a FP division by 0. dnl For the developers: to check whether all these tests are disabled, dnl configure MPFR with "-DMPFR_TESTS_FPE_DIV -DMPFR_ERRDIVZERO". AC_CACHE_CHECK([if the FP division by 0 fails], mpfr_cv_errdivzero, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ int main (void) { volatile double d = 0.0, x; x = 0.0 / d; x = 1.0 / d; (void) x; return 0; } ]])], [mpfr_cv_errdivzero="no"], [mpfr_cv_errdivzero="yes"], [mpfr_cv_errdivzero="cannot test, assume no"]) ]) if test "$mpfr_cv_errdivzero" = "yes"; then AC_DEFINE(MPFR_ERRDIVZERO,1,[Define if the FP division by 0 fails.]) AC_MSG_WARN([The floating-point division by 0 fails instead of]) AC_MSG_WARN([returning a special value: NaN or infinity. Tests]) AC_MSG_WARN([involving a FP division by 0 will be disabled.]) fi dnl Check whether NAN != NAN (as required by the IEEE-754 standard, dnl but not by the ISO C standard). For instance, this is false with dnl MIPSpro 7.3.1.3m under IRIX64. By default, assume this is true. dnl Note that this test may not detect all issues. For instance, with dnl icx 2021.2.0 (and default fast-math), the result depends on whether dnl the identifier has internal or external linkage: dnl https://community.intel.com/t5/Intel-oneAPI-Base-Toolkit/icx-2021-2-0-bug-incorrect-NaN-comparison-using-an-identifier/m-p/1286869 dnl TODO: change "NAN == NAN" to "NaN is supported" and rename dnl the MPFR_NANISNAN macro? AC_CACHE_CHECK([if NAN == NAN], mpfr_cv_nanisnan, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include #include #ifndef NAN # define NAN (0.0/0.0) #endif int main (void) { double d; d = NAN; return d != d; } ]])], [mpfr_cv_nanisnan="yes"], [mpfr_cv_nanisnan="no"], [mpfr_cv_nanisnan="cannot test, assume no"]) ]) if test "$mpfr_cv_nanisnan" = "yes"; then AC_DEFINE(MPFR_NANISNAN,1,[Define if NAN == NAN.]) AC_MSG_WARN([The test NAN != NAN is false. The probable reason is that]) AC_MSG_WARN([your compiler optimizes floating-point expressions in an]) AC_MSG_WARN([unsafe way because some option, such as -ffast-math or]) AC_MSG_WARN([-fast (depending on the compiler), has been used. You]) AC_MSG_WARN([should NOT use such an option, otherwise MPFR functions]) AC_MSG_WARN([such as mpfr_get_d and mpfr_set_d may return incorrect]) AC_MSG_WARN([results on special FP numbers (e.g. NaN or signed zeros).]) AC_MSG_WARN([If you did not use such an option, please send us a bug]) AC_MSG_WARN([report so that we can try to find a workaround for your]) AC_MSG_WARN([platform and/or document the behavior.]) fi dnl Check if the chars '0' to '9', 'a' to 'z', and 'A' to 'Z' are dnl consecutive values. dnl The const is necessary with GCC's "-Wwrite-strings -Werror". AC_MSG_CHECKING([if charset has consecutive values]) AC_RUN_IFELSE([AC_LANG_PROGRAM([[ const char *number = "0123456789"; const char *lower = "abcdefghijklmnopqrstuvwxyz"; const char *upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; ]],[[ int i; unsigned char *p; for (p = (unsigned char*) number, i = 0; i < 9; i++) if ( (*p)+1 != *(p+1) ) return 1; for (p = (unsigned char*) lower, i = 0; i < 25; i++) if ( (*p)+1 != *(p+1) ) return 1; for (p = (unsigned char*) upper, i = 0; i < 25; i++) if ( (*p)+1 != *(p+1) ) return 1; ]])], [AC_MSG_RESULT(yes)],[ AC_MSG_RESULT(no) AC_DEFINE(MPFR_NO_CONSECUTIVE_CHARSET,1,[Charset is not consecutive]) ], [AC_MSG_RESULT(cannot test)]) dnl Must be checked with the LIBM dnl but we don't want to add the LIBM to MPFR dependency. dnl Can't use AC_CHECK_FUNCS since the function may be in LIBM but dnl not exported in math.h saved_LIBS="$LIBS" LIBS="$LIBS $MPFR_LIBM" dnl AC_CHECK_FUNCS([round trunc floor ceil nearbyint]) AC_MSG_CHECKING(for math/round) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (double (*func)(double)) { return 0; } ]], [[ return f(round); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_ROUND, 1,[Have ISO C99 round function]) ],[AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for math/trunc) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (double (*func)(double)) { return 0; } ]], [[ return f(trunc); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_TRUNC, 1,[Have ISO C99 trunc function]) ],[AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for math/floor) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (double (*func)(double)) { return 0; } ]], [[ return f(floor); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_FLOOR, 1,[Have ISO C99 floor function]) ],[AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for math/ceil) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (double (*func)(double)) { return 0; } ]], [[ return f(ceil); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_CEIL, 1,[Have ISO C99 ceil function]) ],[AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for math/nearbyint) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include static int f (double (*func)(double)) { return 0; } ]], [[ return f(nearbyint); ]])], [ AC_MSG_RESULT(yes) AC_DEFINE(HAVE_NEARBYINT, 1,[Have ISO C99 nearbyint function]) ],[AC_MSG_RESULT(no)]) LIBS="$saved_LIBS" dnl Try to determine the format of double MPFR_C_REALFP_FORMAT(double,) case $mpfr_cv_c_double_format in "IEEE double, big endian"*) AC_DEFINE(HAVE_DOUBLE_IEEE_BIG_ENDIAN, 1) ;; "IEEE double, little endian"*) AC_DEFINE(HAVE_DOUBLE_IEEE_LITTLE_ENDIAN, 1) ;; unknown*) ;; *) AC_MSG_WARN([format of `double' unsupported or not recognized: $mpfr_cv_c_double_format]) ;; esac dnl Now try to determine the format of long double MPFR_C_REALFP_FORMAT(long double,L) case $mpfr_cv_c_long_double_format in "IEEE double, big endian"*) AC_DEFINE(HAVE_LDOUBLE_IS_DOUBLE, 1) ;; "IEEE double, little endian"*) AC_DEFINE(HAVE_LDOUBLE_IS_DOUBLE, 1) ;; "IEEE extended, little endian"*) AC_DEFINE(HAVE_LDOUBLE_IEEE_EXT_LITTLE, 1) ;; "IEEE extended, big endian"*) AC_DEFINE(HAVE_LDOUBLE_IEEE_EXT_BIG, 1) ;; "IEEE quad, big endian"*) AC_DEFINE(HAVE_LDOUBLE_IEEE_QUAD_BIG, 1) ;; "IEEE quad, little endian"*) AC_DEFINE(HAVE_LDOUBLE_IEEE_QUAD_LITTLE, 1) ;; "possibly double-double, big endian"*) AC_MSG_WARN([This format is known on GCC/PowerPC platforms,]) AC_MSG_WARN([but due to GCC PR26374, we can't test further.]) AC_MSG_WARN([You can safely ignore this warning, though.]) AC_DEFINE(HAVE_LDOUBLE_MAYBE_DOUBLE_DOUBLE, 1) ;; "possibly double-double, little endian"*) AC_MSG_WARN([This format is known on GCC/PowerPC platforms,]) AC_MSG_WARN([but due to GCC PR26374, we can't test further.]) AC_MSG_WARN([You can safely ignore this warning, though.]) AC_DEFINE(HAVE_LDOUBLE_MAYBE_DOUBLE_DOUBLE, 1) ;; unknown*) ;; *) AC_MSG_WARN([format of `long double' unsupported or not recognized: $mpfr_cv_c_long_double_format]) ;; esac dnl Check if thread-local variables are supported. dnl At least two problems can occur in practice: dnl 1. The compilation fails, e.g. because the compiler doesn't know dnl about the __thread keyword. dnl 2. The compilation succeeds, but the system doesn't support TLS or dnl there is some ld configuration problem. One of the effects can dnl be that thread-local variables always evaluate to 0. So, it is dnl important to run the test below. if test "$enable_thread_safe" != no; then AC_MSG_CHECKING(for TLS support using C11) saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src" AC_RUN_IFELSE([AC_LANG_SOURCE([[ #define MPFR_USE_THREAD_SAFE 1 #define MPFR_USE_C11_THREAD_SAFE 1 #include "mpfr-thread.h" MPFR_THREAD_ATTR int x = 17; int main (void) { return x != 17; } ]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_USE_THREAD_SAFE],1,[Build MPFR as thread safe]) AC_DEFINE([MPFR_USE_C11_THREAD_SAFE],1,[Build MPFR as thread safe using C11]) tls_c11_support=yes enable_thread_safe=yes ], [AC_MSG_RESULT(no) ], [AC_MSG_RESULT([cannot test, assume no]) ]) CPPFLAGS="$saved_CPPFLAGS" if test "$tls_c11_support" != "yes" then AC_MSG_CHECKING(for TLS support) saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src" AC_RUN_IFELSE([AC_LANG_SOURCE([[ #define MPFR_USE_THREAD_SAFE 1 #include "mpfr-thread.h" MPFR_THREAD_ATTR int x = 17; int main (void) { return x != 17; } ]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_USE_THREAD_SAFE],1,[Build MPFR as thread safe]) enable_thread_safe=yes ], [AC_MSG_RESULT(no) if test "$enable_thread_safe" = yes; then AC_MSG_ERROR([please configure with --disable-thread-safe]) fi ], [if test "$enable_thread_safe" = yes; then AC_MSG_RESULT([cannot test, assume yes]) AC_DEFINE([MPFR_USE_THREAD_SAFE],1,[Build MPFR as thread safe]) else AC_MSG_RESULT([cannot test, assume no]) fi ]) CPPFLAGS="$saved_CPPFLAGS" fi fi if test "$enable_decimal_float" != no; then dnl Check if decimal floats are available. dnl For the different cases, we try to use values that will not be returned dnl by build tools. For instance, 1 must not be used as it can be returned dnl by gcc or by ld in case of link failure. dnl Note: We currently reread the 64-bit data memory as a double and compare dnl it with constants. However, if there is any issue with double, such as dnl the use of an extended precision, this may fail. Possible solutions: dnl 1. Use the hex format for the double constants (this format should be dnl supported if _Decimal64 is). dnl 2. Use more precision in the double constants (more decimal digits), dnl just in case. dnl 3. Use uint64_t (or unsigned long long, though this type might not be dnl on 64 bits) instead of or in addition to the test on double. dnl 4. Use an array of 8 unsigned char's instead of or in addition to the dnl test on double, considering the 2 practical cases of endianness. AC_MSG_CHECKING(if compiler knows _Decimal64) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[_Decimal64 x;]])], [AC_MSG_RESULT(yes) AC_MSG_CHECKING(decimal float format) AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include ]], [[ volatile _Decimal64 x = 1; union { double d; _Decimal64 d64; } y; if (x != x) return 83; y.d64 = 1234567890123456.0dd; return y.d == 0.14894469406741037E-123 ? 80 : y.d == 0.59075095508629822E-68 ? 81 : 82; ]])], [AC_MSG_RESULT(internal error) AC_MSG_FAILURE(unexpected exit status 0)], [d64_exit_status=$? case "$d64_exit_status" in 80) AC_MSG_RESULT(DPD) if test "$enable_decimal_float" = bid; then AC_MSG_ERROR([encoding mismatch (BID requested).]) fi if test "$enable_decimal_float" != generic; then enable_decimal_float=dpd fi ;; 81) AC_MSG_RESULT(BID) if test "$enable_decimal_float" = dpd; then AC_MSG_ERROR([encoding mismatch (DPD requested).]) fi if test "$enable_decimal_float" != generic; then enable_decimal_float=bid fi ;; 82) AC_MSG_RESULT(neither DPD nor BID) if test "$enable_decimal_float" = dpd; then AC_MSG_ERROR([encoding mismatch (DPD requested).]) fi if test "$enable_decimal_float" = bid; then AC_MSG_ERROR([encoding mismatch (BID requested).]) fi enable_decimal_float=generic AC_MSG_WARN([The _Decimal64 encoding is non-standard or there was an]) AC_MSG_WARN([issue with its detection. The generic code will be used.]) AC_MSG_WARN([Please do not forget to test with `make check'.]) AC_MSG_WARN([In case of failure of a decimal test, you should rebuild]) AC_MSG_WARN([MPFR without --enable-decimal-float.]) ;; *) AC_MSG_RESULT(error (exit status $d64_exit_status)) case "$enable_decimal_float" in yes|bid|dpd|generic) AC_MSG_FAILURE([internal or link error. Please build MPFR without --enable-decimal-float.]) ;; *) enable_decimal_float=no ;; esac ;; esac], [AC_MSG_RESULT(cannot test) dnl Since the _Decimal64 type exists, we assume that it is correctly dnl supported. The detection of the encoding may still be done at dnl compile time. We do not add a configure test for it so that this dnl can be done on platforms where configure cannot be used. enable_decimal_float=compile-time]) ], [AC_MSG_RESULT(no) case "$enable_decimal_float" in yes|bid|dpd|generic) AC_MSG_FAILURE([compiler doesn't know _Decimal64 (ISO/IEC TR 24732). Please use another compiler or build MPFR without --enable-decimal-float.]) ;; *) enable_decimal_float=no ;; esac]) if test "$enable_decimal_float" != no; then AC_DEFINE([MPFR_WANT_DECIMAL_FLOATS],1, [Build decimal float functions]) case "$enable_decimal_float" in dpd) AC_DEFINE([DECIMAL_DPD_FORMAT],1,[]) ;; bid) AC_DEFINE([DECIMAL_BID_FORMAT],1,[]) ;; generic) AC_DEFINE([DECIMAL_GENERIC_CODE],1,[]) ;; compile-time) ;; *) AC_MSG_ERROR(internal error) ;; esac fi dnl Check the bit-field ordering for _Decimal128. dnl Little endian: sig=0 comb=49400 t0=0 t1=0 t2=0 t3=10 dnl Big endian: sig=0 comb=8 t0=0 t1=0 t2=0 t3=570933248 dnl Note: If the compilation fails, the compiler should exit with dnl an exit status less than 80. AC_MSG_CHECKING(bit-field ordering for _Decimal128) AC_RUN_IFELSE([AC_LANG_PROGRAM([[ ]], [[ union ieee_decimal128 { struct { unsigned int t3:32; unsigned int t2:32; unsigned int t1:32; unsigned int t0:14; unsigned int comb:17; unsigned int sig:1; } s; _Decimal128 d128; } x; x.d128 = 1.0dl; if (x.s.sig == 0 && x.s.comb == 49400 && x.s.t0 == 0 && x.s.t1 == 0 && x.s.t2 == 0 && x.s.t3 == 10) return 80; /* little endian */ else if (x.s.sig == 0 && x.s.comb == 8 && x.s.t0 == 0 && x.s.t1 == 0 && x.s.t2 == 0 && x.s.t3 == 570933248) return 81; /* big endian */ else return 82; /* unknown encoding */ ]])], [AC_MSG_RESULT(internal error)], [d128_exit_status=$? case "$d128_exit_status" in 80) AC_MSG_RESULT(little endian) AC_DEFINE([HAVE_DECIMAL128_IEEE_LITTLE_ENDIAN],1) ;; 81) AC_MSG_RESULT(big endian) AC_DEFINE([HAVE_DECIMAL128_IEEE_BIG_ENDIAN],1) ;; *) AC_MSG_RESULT(unavailable or unknown) ;; esac], [AC_MSG_RESULT(cannot test)]) fi # End of decimal float checks dnl Check if _Float128 or __float128 is available. We also require the dnl compiler to support hex constants with the f128 or q suffix (this dnl prevents the _Float128 support with GCC's -std=c90, but who cares?). dnl Note: We use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE since an dnl error may occur only at link time, such as under NetBSD: dnl https://mail-index.netbsd.org/pkgsrc-users/2018/02/02/msg026220.html dnl https://mail-index.netbsd.org/pkgsrc-users/2018/02/05/msg026238.html dnl By using volatile and making the exit code depend on the value of dnl this variable, we also make sure that optimization doesn't make dnl the "undefined reference" error disappear. if test "$enable_float128" != no; then AC_MSG_CHECKING(if _Float128 with hex constants is supported) AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ volatile _Float128 x = 0x1.fp+16383f128; return x == 0; ]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_WANT_FLOAT128],1,[Build float128 functions])], [AC_MSG_RESULT(no) AC_MSG_CHECKING(if __float128 can be used as a fallback) dnl Use the q suffix in this case. AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #define _Float128 __float128 ]], [[ volatile _Float128 x = 0x1.fp+16383q; return x == 0; ]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_WANT_FLOAT128],2, [Build float128 functions with float128 fallback]) AC_DEFINE([_Float128],[__float128],[__float128 fallback])], [AC_MSG_RESULT(no) if test "$enable_float128" = yes; then AC_MSG_ERROR( [compiler doesn't know _Float128 or __float128 with hex constants. Please use another compiler or build MPFR without --enable-float128.]) fi]) ]) fi dnl Check if Static Assertions are supported. AC_MSG_CHECKING(for Static Assertion support) saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src" AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ #define MPFR_USE_STATIC_ASSERT 1 #include "mpfr-sassert.h" /* Test if Static Assertions work */ int main (void) { int x; (void) (x = 1); /* cast to void: avoid a warning, at least with GCC */ /* Test of the macro after a declaraction and a statement. */ MPFR_STAT_STATIC_ASSERT(sizeof(short) <= sizeof(int)); return 0; } ]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_USE_STATIC_ASSERT],1,[Build MPFR with Static Assertions]) ], [AC_MSG_RESULT(no) ]) CPPFLAGS="$saved_CPPFLAGS" if test "$enable_lto" = "yes" ; then MPFR_LTO fi dnl Logging support needs nested functions and the 'cleanup' attribute. dnl This is checked at the end because the change of CC and/or CFLAGS that dnl could occur before may have an influence on this test. The tested code dnl is very similar to what is used in MPFR (mpfr-impl.h). if test "$enable_logging" = yes; then AC_MSG_CHECKING(for nested functions and 'cleanup' attribute) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ int main (void) { auto void f_cleanup (int *p); void f_cleanup (int *p) { int v = *p; (void) v; } int v __attribute__ ((cleanup (f_cleanup))); v = 0; return 0; } ]])], [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no) AC_MSG_ERROR([logging support needs nested functions and the 'cleanup' attribute]) ]) fi ]) m4trace:acinclude.m4:889: -1- AC_DEFUN([MPFR_CHECK_GMP], [ AC_REQUIRE([MPFR_CONFIGS])dnl AC_CACHE_CHECK([for GMP library vs header correctness], mpfr_cv_check_gmp, [ AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include #include ]], [[ fprintf (stderr, "GMP_NAIL_BITS = %d\n", (int) GMP_NAIL_BITS); fprintf (stderr, "GMP_NUMB_BITS = %d\n", (int) GMP_NUMB_BITS); fprintf (stderr, "mp_bits_per_limb = %d\n", (int) mp_bits_per_limb); fprintf (stderr, "sizeof(mp_limb_t) = %d\n", (int) sizeof(mp_limb_t)); if (GMP_NAIL_BITS != 0) { fprintf (stderr, "GMP_NAIL_BITS != 0\n"); return 81; } if (GMP_NUMB_BITS != mp_bits_per_limb) { fprintf (stderr, "GMP_NUMB_BITS != mp_bits_per_limb\n"); return 82; } if (GMP_NUMB_BITS != sizeof(mp_limb_t) * CHAR_BIT) { fprintf (stderr, "GMP_NUMB_BITS != sizeof(mp_limb_t) * CHAR_BIT\n"); return 83; } return 0; ]])], [mpfr_cv_check_gmp="yes"], [mpfr_cv_check_gmp="no (exit status is $?)"], [mpfr_cv_check_gmp="cannot test, assume yes"]) ]) case $mpfr_cv_check_gmp in no*) AC_MSG_ERROR([bad GMP library or header - ABI problem? See 'config.log' for details.]) ;; esac ]) m4trace:acinclude.m4:951: -1- AC_DEFUN([MPFR_CHECK_DBL2INT_BUG], [ AC_REQUIRE([MPFR_CONFIGS])dnl AC_CACHE_CHECK([for double-to-integer conversion bug], mpfr_cv_dbl_int_bug, [ AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include ]], [[ double d; mp_limb_t u; int i; d = 1.0; for (i = 0; i < GMP_NUMB_BITS - 1; i++) d = d + d; u = (mp_limb_t) d; for (; i > 0; i--) { if (u & 1) break; u = u >> 1; } if (i == 0 && u == 1UL) return 0; fprintf (stderr, "Failure: i = %d, (unsigned long) u = %lu\n", i, (unsigned long) u); return 1; ]])], [mpfr_cv_dbl_int_bug="no"], [mpfr_cv_dbl_int_bug="yes or failed to exec (exit status is $?)"], [mpfr_cv_dbl_int_bug="cannot test, assume not present"]) ]) case $mpfr_cv_dbl_int_bug in yes*) AC_MSG_ERROR([double-to-integer conversion is incorrect. You need to use another compiler (or lower the optimization level).]) ;; esac ]) m4trace:acinclude.m4:998: -1- AC_DEFUN([MPFR_CHECK_MP_LIMB_T_VS_LONG], [ AC_REQUIRE([MPFR_CONFIGS]) AC_CACHE_CHECK([for long to fit in mp_limb_t], mpfr_cv_long_within_limb, [ saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src" dnl AC_LINK_IFELSE is safer than AC_COMPILE_IFELSE, as it will detect dnl undefined function-like macros (which otherwise may be regarded dnl as valid function calls with AC_COMPILE_IFELSE since prototypes dnl are not required by the C standard). AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include /* Make sure that a static assertion is used (not MPFR_ASSERTN). */ #undef MPFR_USE_STATIC_ASSERT #define MPFR_USE_STATIC_ASSERT 1 #include "mpfr-sassert.h" ]], [[ MPFR_STAT_STATIC_ASSERT ((mp_limb_t) -1 >= (unsigned long) -1); return 0; ]])], [mpfr_cv_long_within_limb="yes"], [mpfr_cv_long_within_limb="no"]) ]) case $mpfr_cv_long_within_limb in yes*) AC_DEFINE([MPFR_LONG_WITHIN_LIMB],1,[long can be stored in mp_limb_t]) ;; esac CPPFLAGS="$saved_CPPFLAGS" ]) m4trace:acinclude.m4:1029: -1- AC_DEFUN([MPFR_CHECK_MP_LIMB_T_VS_INTMAX], [ AC_REQUIRE([MPFR_CONFIGS]) if test "$ac_cv_type_intmax_t" = yes; then AC_CACHE_CHECK([for intmax_t to fit in mp_limb_t], mpfr_cv_intmax_within_limb, [ saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$srcdir/src -DMPFR_NEED_INTMAX_H" dnl AC_LINK_IFELSE is safer than AC_COMPILE_IFELSE, as it will detect dnl undefined function-like macros (which otherwise may be regarded dnl as valid function calls with AC_COMPILE_IFELSE since prototypes dnl are not required by the C standard). AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include /* Make sure that a static assertion is used (not MPFR_ASSERTN). */ #undef MPFR_USE_STATIC_ASSERT #define MPFR_USE_STATIC_ASSERT 1 #include "mpfr-sassert.h" #include "mpfr-intmax.h" ]], [[ MPFR_STAT_STATIC_ASSERT ((mp_limb_t) -1 >= (uintmax_t) -1); return 0; ]])], [mpfr_cv_intmax_within_limb="yes"], [mpfr_cv_intmax_within_limb="no"]) ]) case $mpfr_cv_intmax_within_limb in yes*) AC_DEFINE([MPFR_INTMAX_WITHIN_LIMB],1,[intmax_t can be stored in mp_limb_t]) ;; esac CPPFLAGS="$saved_CPPFLAGS" fi ]) m4trace:acinclude.m4:1063: -1- AC_DEFUN([MPFR_PARSE_DIRECTORY], [ dnl Check if argument is a directory if test -d $1 ; then dnl Get the absolute path of the directory in case of relative directory dnl with the realpath command. If the output is empty, the cause may be dnl that this command has not been found, and we do an alternate test, dnl the same as what autoconf does for the generated configure script to dnl determine whether a pathname is absolute or relative. local_tmp=`realpath $1 2>/dev/null` if test "$local_tmp" != "" ; then if test -d "$local_tmp" ; then $2="$local_tmp" else $2=$1 fi else dnl The quadrigraphs @<:@, @:>@ and @:}@ produce [, ] and ) dnl respectively (see Autoconf manual). We cannot use quoting here dnl as the result depends on the context in which this macro is dnl invoked! To detect that, one needs to look at every instance dnl of the macro expansion in the generated configure script. case $1 in @<:@\\/@:>@* | ?:@<:@\\/@:>@* @:}@ $2=$1 ;; *@:}@ $2="$PWD"/$1 ;; esac fi dnl Check for space in the directory if test `echo $1|cut -d' ' -f1` != $1 ; then AC_MSG_ERROR($1 directory shall not contain any space.) fi else AC_MSG_ERROR($1 shall be a valid directory) fi ]) m4trace:acinclude.m4:1132: -1- AC_DEFUN([MPFR_C_REALFP_FORMAT], [AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([AC_PROG_AWK]) AC_REQUIRE([AC_OBJEXT]) AS_VAR_PUSHDEF([my_Type_var], [mpfr_cv_c_$1_format])dnl AC_CACHE_CHECK([format of floating-point type `$1'], my_Type_var, [my_Type_var=unknown cat >conftest.c <<\EOF [ #include /* "before" is 16 bytes to ensure there's no padding between it and "x". We're not expecting any type bigger than 16 bytes or with alignment requirements stricter than 16 bytes. */ typedef struct { char before[16]; $1 x; char after[8]; } foo_t; foo_t foo = { { '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\001', '\043', '\105', '\147', '\211', '\253', '\315', '\357' }, -123456789.0, { '\376', '\334', '\272', '\230', '\166', '\124', '\062', '\020' } }; int main (void) { int i; for (i = 0; i < 8; i++) printf ("%d %$2f\n", foo.before[i] + foo.after[i], foo.x); return 0; } ] EOF mpfr_compile="$CC $CFLAGS $CPPFLAGS $LDFLAGS conftest.c -o conftest$EXEEXT >&AS_MESSAGE_LOG_FD 2>&1" if AC_TRY_EVAL(mpfr_compile); then cat >conftest.awk <<\EOF [ BEGIN { found = 0 } # got[] holds a sliding window of bytes read the input. got[0] is the most # recent byte read, and got[31] the oldest byte read, so when looking to # match some data the indices are "reversed". # { for (f = 2; f <= NF; f++) { # new byte, shift others up for (i = 31; i >= 0; i--) got[i+1] = got[i]; got[0] = $f; # end sequence if (got[7] != "376") continue if (got[6] != "334") continue if (got[5] != "272") continue if (got[4] != "230") continue if (got[3] != "166") continue if (got[2] != "124") continue if (got[1] != "062") continue if (got[0] != "020") continue # start sequence, with 8-byte body if (got[23] == "001" && \ got[22] == "043" && \ got[21] == "105" && \ got[20] == "147" && \ got[19] == "211" && \ got[18] == "253" && \ got[17] == "315" && \ got[16] == "357") { saw = " (" got[15] \ " " got[14] \ " " got[13] \ " " got[12] \ " " got[11] \ " " got[10] \ " " got[9] \ " " got[8] ")" if (got[15] == "301" && \ got[14] == "235" && \ got[13] == "157" && \ got[12] == "064" && \ got[11] == "124" && \ got[10] == "000" && \ got[9] == "000" && \ got[8] == "000") { print "IEEE double, big endian" found = 1 exit } if (got[15] == "000" && \ got[14] == "000" && \ got[13] == "000" && \ got[12] == "124" && \ got[11] == "064" && \ got[10] == "157" && \ got[9] == "235" && \ got[8] == "301") { print "IEEE double, little endian" found = 1 exit } } # start sequence, with 12-byte body if (got[27] == "001" && \ got[26] == "043" && \ got[25] == "105" && \ got[24] == "147" && \ got[23] == "211" && \ got[22] == "253" && \ got[21] == "315" && \ got[20] == "357") { saw = " (" got[19] \ " " got[18] \ " " got[17] \ " " got[16] \ " " got[15] \ " " got[14] \ " " got[13] \ " " got[12] \ " " got[11] \ " " got[10] \ " " got[9] \ " " got[8] ")" if (got[19] == "000" && \ got[18] == "000" && \ got[17] == "000" && \ got[16] == "000" && \ got[15] == "240" && \ got[14] == "242" && \ got[13] == "171" && \ got[12] == "353" && \ got[11] == "031" && \ got[10] == "300") { print "IEEE extended, little endian (12 bytes)" found = 1 exit } if (got[19] == "300" && \ got[18] == "031" && \ got[17] == "000" && \ got[16] == "000" && \ got[15] == "353" && \ got[14] == "171" && \ got[13] == "242" && \ got[12] == "240" && \ got[11] == "000" && \ got[10] == "000" && \ got[09] == "000" && \ got[08] == "000") { # format found on m68k print "IEEE extended, big endian (12 bytes)" found = 1 exit } } # start sequence, with 16-byte body if (got[31] == "001" && \ got[30] == "043" && \ got[29] == "105" && \ got[28] == "147" && \ got[27] == "211" && \ got[26] == "253" && \ got[25] == "315" && \ got[24] == "357") { saw = " (" got[23] \ " " got[22] \ " " got[21] \ " " got[20] \ " " got[19] \ " " got[18] \ " " got[17] \ " " got[16] \ " " got[15] \ " " got[14] \ " " got[13] \ " " got[12] \ " " got[11] \ " " got[10] \ " " got[9] \ " " got[8] ")" if (got[23] == "000" && \ got[22] == "000" && \ got[21] == "000" && \ got[20] == "000" && \ got[19] == "240" && \ got[18] == "242" && \ got[17] == "171" && \ got[16] == "353" && \ got[15] == "031" && \ got[14] == "300") { print "IEEE extended, little endian (16 bytes)" found = 1 exit } if (got[23] == "300" && \ got[22] == "031" && \ got[21] == "326" && \ got[20] == "363" && \ got[19] == "105" && \ got[18] == "100" && \ got[17] == "000" && \ got[16] == "000" && \ got[15] == "000" && \ got[14] == "000" && \ got[13] == "000" && \ got[12] == "000" && \ got[11] == "000" && \ got[10] == "000" && \ got[9] == "000" && \ got[8] == "000") { # format used on HP 9000/785 under HP-UX print "IEEE quad, big endian" found = 1 exit } if (got[23] == "000" && \ got[22] == "000" && \ got[21] == "000" && \ got[20] == "000" && \ got[19] == "000" && \ got[18] == "000" && \ got[17] == "000" && \ got[16] == "000" && \ got[15] == "000" && \ got[14] == "000" && \ got[13] == "100" && \ got[12] == "105" && \ got[11] == "363" && \ got[10] == "326" && \ got[9] == "031" && \ got[8] == "300") { print "IEEE quad, little endian" found = 1 exit } if (got[23] == "301" && \ got[22] == "235" && \ got[21] == "157" && \ got[20] == "064" && \ got[19] == "124" && \ got[18] == "000" && \ got[17] == "000" && \ got[16] == "000" && \ got[15] == "000" && \ got[14] == "000" && \ got[13] == "000" && \ got[12] == "000" && \ got[11] == "000" && \ got[10] == "000" && \ got[9] == "000" && \ got[8] == "000") { # format used on 32-bit PowerPC (Mac OS X and Debian GNU/Linux) print "possibly double-double, big endian" found = 1 exit } if (got[23] == "000" && \ got[22] == "000" && \ got[21] == "000" && \ got[20] == "124" && \ got[19] == "064" && \ got[18] == "157" && \ got[17] == "235" && \ got[16] == "301" && \ got[15] == "000" && \ got[14] == "000" && \ got[13] == "000" && \ got[12] == "000" && \ got[11] == "000" && \ got[10] == "000" && \ got[9] == "000" && \ got[8] == "000") { # format used on ppc64le print "possibly double-double, little endian" found = 1 exit } } } } END { if (! found) print "unknown", saw } ] EOF my_Type_var=`od -b conftest$EXEEXT | $AWK -f conftest.awk` case $my_Type_var in unknown*) echo "cannot match anything, conftest$EXEEXT contains" >&AS_MESSAGE_LOG_FD od -b conftest$EXEEXT >&AS_MESSAGE_LOG_FD ;; esac else AC_MSG_WARN([oops, cannot compile test program]) fi rm -f conftest* ])]) m4trace:acinclude.m4:1475: -1- AC_DEFUN([MPFR_HAVE_LIB], [ saved_LIBS="$LIBS" LIBS="-l$1 $LIBS" AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], $2) LIBS="$saved_LIBS" ]) m4trace:acinclude.m4:1488: -1- AC_DEFUN([MPFR_CHECK_LIBM], [AC_REQUIRE([AC_CANONICAL_HOST]) AC_SUBST(MPFR_LIBM,'') case $host in *-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*) # According to libtool.m4: # These systems don't have libm, or don't need it. ;; *-*-solaris*) # On Solaris, some additional math functions are in -lm9x. # For MPFR, https://docs.oracle.com/cd/E19957-01/806-3568/ncg_lib.html # says that ceil, floor and rint are provided by libm. We would also # like nearbyint when available, but there is no mention of it in this # doc. Just in case, let's check for it in m9x, e.g. if it is added in # the future. MPFR_HAVE_LIB(m9x, MPFR_LIBM="-lm9x") MPFR_HAVE_LIB(m, MPFR_LIBM="$MPFR_LIBM -lm") ;; *-ncr-sysv4.3*) # The following AC_CHECK_LIB line about -lmw is copied from libtool.m4, # but do we need it? This has never been tested in MPFR. See commits # 6d34bd85f038abeaeeb77aa8f65b562623cc38bc (1999-02-13) # e65f46d3fc4eb98d25ee94ad8e6f51c5846c8fe3 (1999-03-20) # in the libtool repository. AC_CHECK_LIB(mw, _mwvalidcheckl, MPFR_LIBM="-lmw") MPFR_HAVE_LIB(m, MPFR_LIBM="$MPFR_LIBM -lm") ;; *) MPFR_HAVE_LIB(m, MPFR_LIBM="-lm") ;; esac ]) m4trace:acinclude.m4:1525: -1- AC_DEFUN([MPFR_CHECK_LIBQUADMATH], [AC_REQUIRE([AC_CANONICAL_HOST]) AC_SUBST(MPFR_LIBQUADMATH,'') case $host in *) MPFR_HAVE_LIB(quadmath, MPFR_LIBQUADMATH="-lquadmath") ;; esac ]) m4trace:acinclude.m4:1539: -1- AC_DEFUN([MPFR_LD_SEARCH_PATHS_FIRST], [case "$LD $LDFLAGS" in *-Wl,-search_paths_first*) ;; *) AC_MSG_CHECKING([if the compiler understands -Wl,-search_paths_first]) saved_LDFLAGS="$LDFLAGS" LDFLAGS="-Wl,-search_paths_first $LDFLAGS" AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])], [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)] LDFLAGS="$saved_LDFLAGS") ;; esac ]) m4trace:acinclude.m4:1564: -1- AC_DEFUN([GMP_C_ATTRIBUTE_MODE], [AC_CACHE_CHECK([whether gcc __attribute__ ((mode (XX))) works], gmp_cv_c_attribute_mode, [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[typedef int SItype __attribute__ ((mode (SI)));]], [[]])], gmp_cv_c_attribute_mode=yes, gmp_cv_c_attribute_mode=no) ]) if test $gmp_cv_c_attribute_mode = yes; then AC_DEFINE(HAVE_ATTRIBUTE_MODE, 1, [Define to 1 if the compiler accepts gcc style __attribute__ ((mode (XX)))]) fi ]) m4trace:acinclude.m4:1584: -1- AC_DEFUN([MPFR_FUNC_GMP_PRINTF_SPEC], [ AC_MSG_CHECKING(if gmp_printf supports "%$1") AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include $3 #include ]], [[ char s[256]; $2 a = 17; /* Contrary to the gmp_sprintf test, do not use the 0 flag with the precision, as -Werror=format yields an error, even though this flag is allowed by the ISO C standard (it is just ignored). https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70813 */ if (sprintf (s, "(%.0$1)(%d)", a, 42) != 8 || strcmp (s, "(17)(42)") != 0) return 1; if (gmp_sprintf (s, "(%0.0$1)(%d)", a, 42) == -1 || strcmp (s, "(17)(42)") != 0) return 1; return 0; ]])], [AC_MSG_RESULT(yes) $4], [AC_MSG_RESULT(no) $5], [AC_MSG_RESULT(cross-compiling, assuming yes) $4]) ]) m4trace:acinclude.m4:1623: -1- AC_DEFUN([MPFR_CHECK_PRINTF_SPEC], [ AC_REQUIRE([MPFR_CONFIGS])dnl if test "$ac_cv_type_intmax_t" = yes; then MPFR_FUNC_GMP_PRINTF_SPEC([jd], [intmax_t], [ #ifdef HAVE_INTTYPES_H # include #endif #ifdef HAVE_STDINT_H # include #endif ],, [AC_DEFINE([NPRINTF_J], 1, [printf/gmp_printf cannot read intmax_t])]) fi MPFR_FUNC_GMP_PRINTF_SPEC([hhd], [char], [ #include ],, [AC_DEFINE([NPRINTF_HH], 1, [printf/gmp_printf cannot use `hh' length modifier])]) MPFR_FUNC_GMP_PRINTF_SPEC([lld], [long long int], [ #include ],, [AC_DEFINE([NPRINTF_LL], 1, [printf/gmp_printf cannot read long long int])]) MPFR_FUNC_GMP_PRINTF_SPEC([Lf], [long double], [ #include ], [AC_DEFINE([PRINTF_L], 1, [printf/gmp_printf can read long double])], [AC_DEFINE([NPRINTF_L], 1, [printf/gmp_printf cannot read long double])]) MPFR_FUNC_GMP_PRINTF_SPEC([td], [ptrdiff_t], [ #if defined (__cplusplus) #include #else #include #endif #include ], [AC_DEFINE([PRINTF_T], 1, [printf/gmp_printf can read ptrdiff_t])], [AC_DEFINE([NPRINTF_T], 1, [printf/gmp_printf cannot read ptrdiff_t])]) ]) m4trace:acinclude.m4:1672: -1- AC_DEFUN([MPFR_CHECK_PRINTF_GROUPFLAG], [ AC_MSG_CHECKING(if gmp_printf supports the ' group flag) AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include ]], [[ char s[256]; if (gmp_sprintf (s, "%'d", 17) == -1) return 1; return (strcmp (s, "17") != 0); ]])], [AC_MSG_RESULT(yes) AC_DEFINE([PRINTF_GROUPFLAG], 1, [Define if gmp_printf supports the ' group flag])], [AC_MSG_RESULT(no)], [AC_MSG_RESULT(cannot test, assume no)]) ]) m4trace:acinclude.m4:1696: -1- AC_DEFUN([MPFR_LTO], [ dnl Check for -flto support CFLAGS="$CFLAGS -flto" AC_MSG_CHECKING([if Link Time Optimisation flag '-flto' is supported...]) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ int main(void) { return 0; } ]])], [AC_MSG_RESULT(yes) ], [AC_MSG_RESULT(no) AC_MSG_ERROR([Link Time Optimisation flag '-flto' is not supported.]) ]) dnl Check if it works... mpfr_compile_and_link() { echo "int f(int); int f(int n) { return n; }" > conftest-f.c echo "int f(int); int main() { return f(0); }" > conftest-m.c echo "$CC $CFLAGS -c -o conftest-f.o conftest-f.c" >&2 $CC $CFLAGS -c -o conftest-f.o conftest-f.c || return 1 echo "$AR cru conftest-lib.a conftest-f.o" >&2 $AR cru conftest-lib.a conftest-f.o || return 1 echo "$RANLIB conftest-lib.a" >&2 $RANLIB conftest-lib.a || return 1 echo "$CC $CFLAGS conftest-m.c conftest-lib.a" >&2 $CC $CFLAGS conftest-m.c conftest-lib.a || return 1 return 0 } AC_MSG_CHECKING([if Link Time Optimisation works with AR=$AR]) if mpfr_compile_and_link 2> conftest-log1.txt ; then cat conftest-log1.txt >&AS_MESSAGE_LOG_FD AC_MSG_RESULT(yes) else cat conftest-log1.txt >&AS_MESSAGE_LOG_FD AC_MSG_RESULT(no) AR=gcc-ar RANLIB=gcc-ranlib AC_MSG_CHECKING([if Link Time Optimisation works with AR=$AR]) if mpfr_compile_and_link 2> conftest-log2.txt; then cat conftest-log2.txt >&AS_MESSAGE_LOG_FD AC_MSG_RESULT(yes) else cat conftest-log2.txt >&AS_MESSAGE_LOG_FD AC_MSG_RESULT(no) AC_MSG_ERROR([Link Time Optimisation is not supported (see config.log for details).]) fi fi rm -f conftest* ]) m4trace:acinclude.m4:1754: -1- AC_DEFUN([MPFR_CHECK_CONSTRUCTOR_ATTR], [ AC_MSG_CHECKING([for constructor and destructor attributes]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include int x = 0; __attribute__((constructor)) static void call_f(void) { x = 1742; } __attribute__((destructor)) static void call_g(void) { x = 1448; } ]], [[ return (x == 1742) ? 0 : 1; ]])], [AC_MSG_RESULT(yes) mpfr_have_constructor_destructor_attributes=yes ], [AC_MSG_RESULT(no)] ) if test "$mpfr_have_constructor_destructor_attributes" = "yes"; then AC_DEFINE(MPFR_HAVE_CONSTRUCTOR_ATTR, 1, [Define if the constructor/destructor GCC attributes are supported.]) fi ]) m4trace:acinclude.m4:1784: -1- AC_DEFUN([MPFR_CHECK_C11_THREAD], [ AC_MSG_CHECKING([for ISO C11 thread support]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include #include mtx_t lock; once_flag once = ONCE_FLAG_INIT; thrd_t thd_idx; int x = 0; void once_call (void) { x = 1; 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