dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
dnl
-dnl See docs/html/17_intro/configury.html#enable for documentation.
+dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
+dnl documentation.
dnl
m4_define([GLIBCXX_ENABLE],[dnl
m4_define([_g_switch],[--enable-$1])dnl
dnl links in the latter.
dnl --enable-libstdcxx-time=rt
dnl also searches (and, if needed, links) librt. Note that this is
-dnl not always desirable because, in glibc, for example, in turn it
-dnl triggers the linking of libpthread too, which activates locking,
+dnl not always desirable because, in glibc 2.16 and earlier, for
+dnl example, in turn it triggers the linking of libpthread too,
+dnl which activates locking,
dnl a large overhead for single-thread programs.
dnl --enable-libstdcxx-time=no
dnl --disable-libstdcxx-time
dnl
AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
- AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
- GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
+ GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
[use KIND for check type],
[permit yes|no|rt])
ac_has_clock_monotonic=no
ac_has_clock_realtime=no
- AC_MSG_RESULT($enable_libstdcxx_time)
+ ac_has_nanosleep=no
+ ac_has_sched_yield=no
+
+ if test x"$enable_libstdcxx_time" = x"auto"; then
+
+ case "${target_os}" in
+ cygwin*)
+ ac_has_nanosleep=yes
+ ;;
+ darwin*)
+ ac_has_nanosleep=yes
+ ac_has_sched_yield=yes
+ ;;
+ gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
+ AC_MSG_CHECKING([for at least GNU libc 2.17])
+ AC_TRY_COMPILE(
+ [#include <features.h>],
+ [
+ #if ! __GLIBC_PREREQ(2, 17)
+ #error
+ #endif
+ ],
+ [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
+ AC_MSG_RESULT($glibcxx_glibc217)
+
+ if test x"$glibcxx_glibc217" = x"yes"; then
+ ac_has_clock_monotonic=yes
+ ac_has_clock_realtime=yes
+ fi
+ ac_has_nanosleep=yes
+ ac_has_sched_yield=yes
+ ;;
+ freebsd*|netbsd*)
+ ac_has_clock_monotonic=yes
+ ac_has_clock_realtime=yes
+ ac_has_nanosleep=yes
+ ac_has_sched_yield=yes
+ ;;
+ openbsd*)
+ ac_has_clock_monotonic=yes
+ ac_has_clock_realtime=yes
+ ac_has_nanosleep=yes
+ ;;
+ solaris*)
+ GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
+ ac_has_clock_monotonic=yes
+ ac_has_clock_realtime=yes
+ ac_has_nanosleep=yes
+ ac_has_sched_yield=yes
+ ;;
+ esac
- if test x"$enable_libstdcxx_time" != x"no"; then
+ elif test x"$enable_libstdcxx_time" != x"no"; then
if test x"$enable_libstdcxx_time" = x"rt"; then
AC_SEARCH_LIBS(clock_gettime, [rt posix4])
case "$ac_cv_search_sched_yield" in
-lposix4*)
GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
- AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
- [ Defined if sched_yield is available. ])
+ ac_has_sched_yield=yes
;;
-lrt*)
if test x"$enable_libstdcxx_time" = x"rt"; then
GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
- AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
- [ Defined if sched_yield is available. ])
+ ac_has_sched_yield=yes
fi
;;
*)
- AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
- [ Defined if sched_yield is available. ])
+ ac_has_sched_yield=yes
;;
esac
fi
fi
+ if test x"$ac_has_clock_monotonic" != x"yes"; then
+ case ${target_os} in
+ linux*)
+ AC_MSG_CHECKING([for clock_gettime syscall])
+ AC_TRY_COMPILE(
+ [#include <unistd.h>
+ #include <time.h>
+ #include <sys/syscall.h>
+ ],
+ [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
+ timespec tp;
+ #endif
+ syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
+ syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
+ ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
+ AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
+ if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
+ AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
+ [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
+ ac_has_clock_monotonic=yes
+ ac_has_clock_realtime=yes
+ fi;;
+ esac
+ fi
+
if test x"$ac_has_clock_monotonic" = x"yes"; then
AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
[ Defined if clock_gettime has monotonic clock support. ])
[ Defined if clock_gettime has realtime clock support. ])
fi
+ if test x"$ac_has_sched_yield" = x"yes"; then
+ AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
+ [ Defined if sched_yield is available. ])
+ fi
+
if test x"$ac_has_nanosleep" = x"yes"; then
AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
[ Defined if nanosleep is available. ])
AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
AC_CACHE_VAL(glibcxx_cv_random_tr1, [
if test -r /dev/random && test -r /dev/urandom; then
- glibcxx_cv_random_tr1=yes;
+ ## For MSys environment the test above is detect as false-positive
+ ## on mingw-targets. So disable it explicit for them.
+ case ${target_os} in
+ *mingw*) glibcxx_cv_random_tr1=no ;;
+ *) glibcxx_cv_random_tr1=yes ;;
+ esac
else
glibcxx_cv_random_tr1=no;
fi
GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
])
+dnl
+dnl Use vtable verification.
+dnl
+dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
+dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
+
+dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
+dnl Where DEFAULT is `yes' or `no'.
+dnl
+AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
+
+ GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
+
+ AC_MSG_CHECKING([for vtable verify support])
+ AC_MSG_RESULT([$enable_vtable_verify])
+
+ if test $enable_vtable_verify = yes; then
+ VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
+ VTV_PCH_CXXFLAGS="-fvtable-verify=std"
+ VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
+ else
+ VTV_CXXFLAGS=
+ VTV_PCH_CXXFLAGS=
+ VTV_CXXLINKFLAGS=
+ fi
+
+ AC_SUBST(VTV_CXXFLAGS)
+ AC_SUBST(VTV_PCH_CXXFLAGS)
+ AC_SUBST(VTV_CXXLINKFLAGS)
+ GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
+])
+
dnl
dnl Check for parallel mode pre-requisites, including OpenMP support.
dnl
if AC_TRY_EVAL(ac_compile); then
if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
enable_sjlj_exceptions=yes
+ elif grep _Unwind_SjLj_Register conftest.s >/dev/null 2>&1 ; then
+ enable_sjlj_exceptions=yes
elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
enable_sjlj_exceptions=no
elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
fi
# For libtool versioning info, format is CURRENT:REVISION:AGE
-libtool_VERSION=6:18:0
+libtool_VERSION=6:20:0
# Everything parsed; figure out what files and settings to use.
case $enable_symvers in
GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
])
+dnl
+dnl Check whether obsolescent tmpnam is available in <stdio.h>,
+dnl and define _GLIBCXX_USE_TMPNAM.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
+dnl
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -fno-exceptions"
+dnl
+ AC_MSG_CHECKING([for tmpnam])
+ AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
+ GCC_TRY_COMPILE_OR_LINK(
+ [#include <stdio.h>],
+ [char *tmp = tmpnam(NULL);],
+ [glibcxx_cv_TMPNAM=yes],
+ [glibcxx_cv_TMPNAM=no])
+ ])
+ if test $glibcxx_cv_TMPNAM = yes; then
+ AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
+ fi
+ AC_MSG_RESULT($glibcxx_cv_TMPNAM)
+dnl
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ AC_LANG_RESTORE
+])
+
+dnl
+dnl Check to see if sys/sdt.h exists and that it is suitable for use.
+dnl Some versions of sdt.h were not compatible with C++11.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
+ AC_MSG_RESULT([for suitable sys/sdt.h])
+ # Note that this test has to be run with the C language.
+ # Otherwise, sdt.h will try to include some headers from
+ # libstdc++ itself.
+ AC_LANG_SAVE
+ AC_LANG_C
+ AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
+ # Because we have to run the test in C, we use grep rather
+ # than the compiler to check for the bug. The bug is that
+ # were strings without trailing whitespace, causing g++
+ # to look for operator"". The pattern searches for the fixed
+ # output.
+ AC_EGREP_CPP([ \",\" ], [
+ #include <sys/sdt.h>
+ int f() { STAP_PROBE(hi, bob); }
+ ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
+ ])
+ AC_LANG_RESTORE
+ if test $glibcxx_cv_sys_sdt_h = yes; then
+ AC_DEFINE(HAVE_SYS_SDT_H, 1,
+ [Define to 1 if you have a suitable <sys/sdt.h> header file])
+ fi
+ AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
+])
# Macros from the top-level gcc directory.
m4_include([../config/gc++filt.m4])
projects / gcc.git / blobdiff