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configure: Also check C++11 (flags) for ${build} compiler not only for ${host}

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config/ChangeLog:

	PR bootstrap/96612
	* ax_cxx_compile_stdcxx.m4: Add fourth argument to check also
	the CXX_FOR_BUILD compiler.

ChangeLog:

	PR bootstrap/96612
	* configure.ac: Run AX_CXX_COMPILE_STDCXX also for ${build} compiler,
	if not the same as ${host}.
	* configure: Regenerate.
This commit is contained in:
Tobias Burnus 2020-08-20 21:59:00 +02:00
parent 5e9ad288eb
commit 7ffcf5d611
3 changed files with 1039 additions and 11 deletions
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39
config/ax_cxx_compile_stdcxx.m4
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@ -25,6 +25,10 @@
# regardless, after defining HAVE_CXX${VERSION} if and only if a
# supporting mode is found.
#
# If the fourth argument is an optional CXX/CXXFLAG/CPPFLAG suffix, e.g.
# "_FOR_BUILD" or "_FOR_TARGET".
#
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
@ -62,14 +66,20 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
[m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
AC_LANG_PUSH([C++])dnl
ac_success=no
m4_ifnblank([$4], [dnl
ax_cv_cxx_compile_cxx$1_orig_cxx="$CXX"
ax_cv_cxx_compile_cxx$1_orig_cxxflags="$CXXFLAGS"
ax_cv_cxx_compile_cxx$1_orig_cppflags="$CPPFLAGS"
CXX="$CXX$4"
CXXFLAGS="$CXXFLAGS$4"
CPPFLAGS="$CPPFLAGS$4"])
m4_if([$2], [], [dnl
AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
ax_cv_cxx_compile_cxx$1,
ax_cv_cxx_compile_cxx$1$4,
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[ax_cv_cxx_compile_cxx$1=yes],
[ax_cv_cxx_compile_cxx$1=no])])
if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
[ax_cv_cxx_compile_cxx$1$4=yes],
[ax_cv_cxx_compile_cxx$1$4=no])])
if test x$ax_cv_cxx_compile_cxx$1$4 = xyes; then
ac_success=yes
fi])
@ -77,7 +87,7 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
if test x$ac_success = xno; then
for alternative in ${ax_cxx_compile_alternatives}; do
switch="-std=gnu++${alternative}"
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1$4_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
@ -104,7 +114,7 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
dnl Cray's crayCC needs "-h std=c++11"
for alternative in ${ax_cxx_compile_alternatives}; do
for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1$4_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
@ -127,6 +137,13 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
fi
done
fi])
m4_ifnblank([$4], [dnl
CXX$4="$CXX"
CXXFLAGS$4="$CXXFLAGS"
CPPFLAGS$4="$CPPFLAGS"
CXX="$ax_cv_cxx_compile_cxx$1_orig_cxx"
CXXFLAGS="$ax_cv_cxx_compile_cxx$1_orig_cxxflags"
CPPFLAGS="$ax_cv_cxx_compile_cxx$1_orig_cppflags"])
AC_LANG_POP([C++])
if test x$ax_cxx_compile_cxx$1_required = xtrue; then
if test x$ac_success = xno; then
@ -134,14 +151,14 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
fi
fi
if test x$ac_success = xno; then
HAVE_CXX$1=0
HAVE_CXX$1$4=0
AC_MSG_NOTICE([No compiler with C++$1 support was found])
else
HAVE_CXX$1=1
AC_DEFINE(HAVE_CXX$1,1,
HAVE_CXX$1$4=1
AC_DEFINE(HAVE_CXX$1$4,1,
[define if the compiler supports basic C++$1 syntax])
fi
AC_SUBST(HAVE_CXX$1)
AC_SUBST(HAVE_CXX$1$4)
])

1007
configure vendored
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File diff suppressed because it is too large Load Diff

4
configure.ac
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@ -1470,6 +1470,10 @@ if test "$enable_bootstrap:$GXX" = "yes:yes"; then
CXX="$CXX -std=c++11"
elif test "$have_compiler" = yes; then
AX_CXX_COMPILE_STDCXX(11)
if test "${build}" != "${host}"; then
AX_CXX_COMPILE_STDCXX(11, [], [], [_FOR_BUILD])
fi
fi
# Used for setting $lt_cv_objdir