https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78666
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Sebor <mse...@gcc.gnu.org>: https://gcc.gnu.org/g:71ad0b5dde449ee1f6b755a99f5c52152e375835 commit r11-3239-g71ad0b5dde449ee1f6b755a99f5c52152e375835 Author: Martin Sebor <mse...@redhat.com> Date: Wed Sep 16 14:04:01 2020 -0600 Detect conflicts between incompatible uses of the same attribute (PR c/78666). Resolves: PR c/78666 - conflicting attribute alloc_size accepted PR c/96126 - conflicting attribute section accepted on redeclaration gcc/c-family/ChangeLog: PR c/78666 PR c/96126 * c-attribs.c (validate_attr_args): New function. (validate_attr_arg): Same. (handle_section_attribute): Call it. Introduce a local variable. (handle_alloc_size_attribute): Same. (handle_alloc_align_attribute): Same. gcc/testsuite/ChangeLog: PR c/78666 PR c/96126 * gcc.dg/attr-alloc_align-5.c: New test. * gcc.dg/attr-alloc_size-13.c: New test. * gcc.dg/attr-section.c: New test. * c-c++-common/builtin-has-attribute-3.c: Add xfails due to expected warnings to be cleaned up.