https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86450
--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Tue Jul 17 13:18:47 2018 New Revision: 262824 URL: https://gcc.gnu.org/viewcvs?rev=262824&root=gcc&view=rev Log: PR libstdc++/86450 use -Wabi=2 and simplify -Werror use Use -Wabi=2 to fix warnings about -Wabi having no effect on its own. This requires suppressing two warnings in src/c++11/debug.cc which do not affect the library ABI. Previously libstdc++ defaulted to --enable-werror but the -Werror flag was not actually added unless --enable-maintainer-mode was used. This is not documented and not the expected behaviour. This removes any special treatment for maintainer-mode, makes -Werror depend directly on --enable-werror, and changes the default to --enable-werror=no. PR libstdc++/86450 * acinclude.m4 (GLIBCXX_CHECK_COMPILER_FEATURES): Don't define WERROR. (GLIBCXX_EXPORT_FLAGS): Use -Wabi=2 instead of -Wabi. * configure: Regenerate. * configure.ac: Change GLIBCXX_ENABLE_WERROR default to "no". * doc/Makefile.in: Regenerate. * fragment.am: Set WERROR_FLAG to -Werror instead of $(WERROR). * include/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++11/debug.cc: Use diagnostic pragmas to suppress warnings from -Wabi=2 that don't affect exported symbols. * src/c++98/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/Makefile.in trunk/libstdc++-v3/acinclude.m4 trunk/libstdc++-v3/configure trunk/libstdc++-v3/configure.ac trunk/libstdc++-v3/doc/Makefile.in trunk/libstdc++-v3/fragment.am trunk/libstdc++-v3/include/Makefile.in trunk/libstdc++-v3/libsupc++/Makefile.in trunk/libstdc++-v3/po/Makefile.in trunk/libstdc++-v3/python/Makefile.in trunk/libstdc++-v3/src/Makefile.in trunk/libstdc++-v3/src/c++11/Makefile.in trunk/libstdc++-v3/src/c++11/debug.cc trunk/libstdc++-v3/src/c++98/Makefile.in trunk/libstdc++-v3/src/filesystem/Makefile.in trunk/libstdc++-v3/testsuite/Makefile.in
