https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114266
--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Joseph Myers <js...@gcc.gnu.org>: https://gcc.gnu.org/g:d5cebf7e4491ea0306a072ca3368d771a5ff9455 commit r15-5532-gd5cebf7e4491ea0306a072ca3368d771a5ff9455 Author: Joseph Myers <josmy...@redhat.com> Date: Wed Nov 20 21:29:48 2024 +0000 c: Diagnose compound literal for empty array [PR114266] As reported in bug 114266, GCC fails to pedwarn for a compound literal, whose type is an array of unknown size, initialized with an empty initializer. This case is disallowed by C23 (which doesn't have zero-size objects); the case of a named object is diagnosed as expected, but not that for compound literals. (Before C23, the pedwarn for empty initializers sufficed.) Add a check for this specific case with a pedwarn. Bootstrapped with no regressions for x86_64-pc-linux-gnu. PR c/114266 gcc/c/ * c-decl.cc (build_compound_literal): Diagnose array of unknown size with empty initializer for C23. gcc/testsuite/ * gcc.dg/c23-empty-init-4.c: New test.
