https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68344
Eric Gallager <egall at gwmail dot gwu.edu> changed:
What |Removed |Added
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CC| |egall at gwmail dot gwu.edu
--- Comment #1 from Eric Gallager <egall at gwmail dot gwu.edu> ---
I think -Wstrict-prototypes does what you're looking for here:
$ /usr/local/bin/gcc -Wold-style-declaration -Wold-style-definition
-Wstrict-prototypes -Wmissing-parameter-type -Wmissing-prototypes -std=c11
-pedantic -c pr68344.c
pr68344.c:1:1: warning: function declaration isn’t a prototype
[-Wstrict-prototypes]
int a();
^
