https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112808
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:361d230fd7800a7e749aba8ed020f54f5c26d504 commit r15-4208-g361d230fd7800a7e749aba8ed020f54f5c26d504 Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Sep 26 16:55:07 2024 +0100 libstdc++: Enable _GLIBCXX_ASSERTIONS by default for -O0 [PR112808] Too many users don't know about -D_GLIBCXX_ASSERTIONS and so are missing valuable checks for C++ standard library preconditions. This change enables libstdc++ assertions by default when compiling with -O0 so that we diagnose more bugs by default. When users enable optimization we don't add the assertions by default (because they have non-zero overhead) so they still need to enable them manually. For users who really don't want the assertions even in unoptimized builds, defining _GLIBCXX_NO_ASSERTIONS will prevent them from being enabled automatically. libstdc++-v3/ChangeLog: PR libstdc++/112808 * doc/xml/manual/using.xml (_GLIBCXX_ASSERTIONS): Document implicit definition for -O0 compilation. (_GLIBCXX_NO_ASSERTIONS): Document. * doc/html/manual/using_macros.html: Regenerate. * include/bits/c++config [!__OPTIMIZE__] (_GLIBCXX_ASSERTIONS): Define for unoptimized builds.
