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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. |
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This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.