https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121133
--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:281a6a0a8b3b2fd7c07ad6e0bf8454d60d9d5034 commit r15-10156-g281a6a0a8b3b2fd7c07ad6e0bf8454d60d9d5034 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Jul 30 13:23:56 2025 +0200 c++: Make __extension__ silence -Wlong-long pedwarns/warnings [PR121133] The PR13358 r0-92909 change changed the diagnostics on long long in C++ (either with -std=c++98 or -Wlong-long), but unlike the C FE we unfortunately warn even in the __extension__ long long a; etc. cases. The C FE in that case in disable_extension_diagnostics saves and clears not just pedantic flag but also warn_long_long (and several others), while C++ FE only temporarily disables pedantic. The following patch makes it behave like the C FE in this regard, though (__extension__ 1LL) still doesn't work because of the separate lexing (and I must say I have no idea how to fix that). Or do you prefer a solution closer to the C FE, cp_parser_extension_opt saving the values into a bitfield and have another function to restore the state (or use RAII)? 2025-07-30 Jakub Jelinek <ja...@redhat.com> PR c++/121133 * parser.cc (cp_parser_unary_expression): Adjust cp_parser_extension_opt caller and restore warn_long_long. (cp_parser_declaration): Likewise. (cp_parser_block_declaration): Likewise. (cp_parser_member_declaration): Likewise. (cp_parser_extension_opt): Add SAVED_LONG_LONG argument, save previous warn_long_long state into it and clear it for __extension__. * g++.dg/warn/pr121133-1.C: New test. * g++.dg/warn/pr121133-2.C: New test. * g++.dg/warn/pr121133-3.C: New test. * g++.dg/warn/pr121133-4.C: New test. (cherry picked from commit fac66b476afccac607dbd9b4e971a42a04666387)
