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[v3] libstdc++/34032
- From: Paolo Carlini <pcarlini at suse dot de>
- To: Gcc Patch List <gcc-patches at gcc dot gnu dot org>
- Date: Fri, 09 Nov 2007 16:56:09 +0100
- Subject: [v3] libstdc++/34032
Hi,
tested x86_64-linux and powerpc-darwin by me and cygwin by Eric Niebler,
committed to mainline.
Paolo.
/////////////////////
2007-11-09 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/34032
* acinclude.m4 ([GLIBCXX_ENABLE_C99], [GLIBCXX_CHECK_C99_TR1]):
Use -std=c++98 instead of the default -std=gnu++98.
* configure: Regenerate.
Index: acinclude.m4
===================================================================
--- acinclude.m4 (revision 130038)
+++ acinclude.m4 (working copy)
@@ -763,9 +763,13 @@
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
- # Use -fno-exceptions so that the C driver can link these tests without
- # hitting undefined references to personality routines.
+ # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
+ # undefined and fake C99 facilities - like pre-standard snprintf - may be
+ # spuriously enabled.
+ # Long term, -std=c++0x could be even better, could manage to explicitely
+ # request C99 facilities to the underlying C headers.
ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -std=c++98"
ac_save_LIBS="$LIBS"
ac_save_gcc_no_link="$gcc_no_link"
@@ -996,6 +1000,11 @@
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
+ # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
+ # undefined and fake C99 facilities may be spuriously enabled.
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ CXXFLAGS="$CXXFLAGS -std=c++98"
+
# Check for the existence of <complex.h> complex math functions used
# by tr1/complex.
AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
@@ -1266,6 +1275,7 @@
# Check for the existence of the <stdbool.h> header.
AC_CHECK_HEADERS(stdbool.h)
+ CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_RESTORE
])