https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110345
--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:7eb2acb7221b5a219ece1a693d9ac594f229a61a commit r15-6334-g7eb2acb7221b5a219ece1a693d9ac594f229a61a Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Dec 18 12:00:13 2024 +0100 c++: Fix up pedantic handling of alignas [PR110345] The following patch on top of the PR110345 P2552R3 series emits pedantic pedwarns for alignas appertaining to incorrect entities. As the middle-end and attribute exclusions look for "aligned" attribute, the patch transforms alignas into "internal "::aligned attribute (didn't use [[aligned (x)]] so that people can't type it that way). 2024-12-18 Jakub Jelinek <ja...@redhat.com> PR c++/110345 gcc/c-family/ * c-common.h (attr_aligned_exclusions): Declare. (handle_aligned_attribute): Likewise. * c-attribs.cc (handle_aligned_attribute): No longer static. (attr_aligned_exclusions): Use extern instead of static. gcc/cp/ * cp-tree.h (enum cp_tree_index): Add CPTI_INTERNAL_IDENTIFIER. (internal_identifier): Define. (internal_attribute_table): Declare. * parser.cc (cp_parser_exception_declaration): Error on alignas on exception declaration. (cp_parser_std_attribute_spec): Turn alignas into internal ns aligned attribute rather than gnu. * decl.cc (initialize_predefined_identifiers): Initialize internal_identifier. * tree.cc (handle_alignas_attribute): New function. (internal_attributes): New variable. (internal_attribute_table): Likewise. * cp-objcp-common.h (cp_objcp_attribute_table): Add internal_attribute_table entry. gcc/testsuite/ * g++.dg/cpp0x/alignas1.C: Add dg-options "". * g++.dg/cpp0x/alignas2.C: Likewise. * g++.dg/cpp0x/alignas7.C: Likewise. * g++.dg/cpp0x/alignas21.C: New test. * g++.dg/ext/bitfield9.C: Expect a warning. * g++.dg/cpp2a/is-layout-compatible3.C: Add dg-options -pedantic. Expect a warning.
