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The following testcase FAILs with -fcompare-debug, but not because -g vs. -g0 would make a difference, but because the second compilation is done with -w in order not to emit warnings twice and -w seems to affect the *.gkd dump content. This is because TREE_NO_WARNING flag, or warn_unused_function does affect not just whether a warning/pedwarn is printed, but also whether we set TREE_PUBLIC on such decls. The following patch makes sure we set it regardless of anything warning related (TREE_NO_WARNING or warn_unused_function). 2020-03-24 Jakub Jelinek <jakub@redhat.com> PR debug/94277 * cgraphunit.c (check_global_declaration): For DECL_EXTERNAL and non-TREE_PUBLIC non-DECL_ARTIFICIAL FUNCTION_DECLs, set TREE_PUBLIC regardless of whether TREE_NO_WARNING is set on it or whether warn_unused_function is true or not. * gcc.dg/pr94277.c: New test.
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