http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57653
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Allan McRae from comment #2) > # echo "int main() { return }" > foo.c > # touch foo.h > # gcc -imacros foo.h foo.c > <command-line>: In function ‘main’: > <command-line>:1:21: error: expected expression before ‘}’ token I cannot reproduce this with r198545, so it seems fixed in mainline. Could you test with that?