https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79433
--- Comment #27 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Fri Oct 20 15:14:29 2017 New Revision: 253943 URL: https://gcc.gnu.org/viewcvs?rev=253943&root=gcc&view=rev Log: PR libstdc++/79433 no #error for including headers with wrong -std Backport from mainline 2017-09-12 Jonathan Wakely <jwak...@redhat.com> PR libstdc++/79433 * doc/xml/manual/status_cxx2017.xml: Update feature-test macros. * doc/html/*: Regenerate. * include/Makefile.am: Remove <bits/c++17_warning.h>. * include/Makefile.in: Regenerate. * include/bits/c++17_warning.h: Remove. * include/bits/string_view.tcc: Do not include <bits/c++17_warning.h> for pre-C++17 modes. * include/std/any: Likewise. (__cpp_lib_any): Define. * include/std/mutex (__cpp_lib_scoped_lock): Adjust value as per new SD-6 draft. * include/std/numeric (__cpp_lib_gcd_lcm): Define as per new SD-6 draft. * include/std/optional: Do not include <bits/c++17_warning.h>. (__cpp_lib_optional): Define. * include/std/shared_mutex: Do not include <bits/c++14_warning.h>. * include/std/string_view: Do not include <bits/c++17_warning.h>. (__cpp_lib_string_view): Define. * include/std/variant: Do not include <bits/c++17_warning.h>. (__cpp_lib_variant): Define. * testsuite/20_util/optional/cons/value_neg.cc: Adjust dg-error line numbers. * testsuite/26_numerics/gcd/1.cc: Test for __cpp_lib_gcd_lcm. * testsuite/26_numerics/gcd/gcd_neg.cc: Adjust dg-error line numbers. * testsuite/26_numerics/lcm/1.cc: Test for __cpp_lib_gcd_lcm. * testsuite/26_numerics/lcm/lcm_neg.cc: Adjust dg-error line numbers. * testsuite/30_threads/scoped_lock/requirements/typedefs.cc: Adjust expected value of __cpp_lib_scoped_lock. Removed: branches/gcc-7-branch/libstdc++-v3/include/bits/c++17_warning.h Modified: branches/gcc-7-branch/libstdc++-v3/ChangeLog branches/gcc-7-branch/libstdc++-v3/doc/xml/manual/status_cxx2017.xml branches/gcc-7-branch/libstdc++-v3/include/Makefile.am branches/gcc-7-branch/libstdc++-v3/include/Makefile.in branches/gcc-7-branch/libstdc++-v3/include/bits/string_view.tcc branches/gcc-7-branch/libstdc++-v3/include/std/any branches/gcc-7-branch/libstdc++-v3/include/std/mutex branches/gcc-7-branch/libstdc++-v3/include/std/numeric branches/gcc-7-branch/libstdc++-v3/include/std/optional branches/gcc-7-branch/libstdc++-v3/include/std/shared_mutex branches/gcc-7-branch/libstdc++-v3/include/std/string_view branches/gcc-7-branch/libstdc++-v3/include/std/variant branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/optional/cons/value_neg.cc branches/gcc-7-branch/libstdc++-v3/testsuite/26_numerics/gcd/1.cc branches/gcc-7-branch/libstdc++-v3/testsuite/26_numerics/gcd/gcd_neg.cc branches/gcc-7-branch/libstdc++-v3/testsuite/26_numerics/lcm/1.cc branches/gcc-7-branch/libstdc++-v3/testsuite/26_numerics/lcm/lcm_neg.cc branches/gcc-7-branch/libstdc++-v3/testsuite/30_threads/scoped_lock/requirements/typedefs.cc