https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89971
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:533695ca333bdfa056979520fbcde3752f14bb7c commit r11-9496-g533695ca333bdfa056979520fbcde3752f14bb7c Author: Jakub Jelinek <ja...@redhat.com> Date: Thu Dec 30 22:23:58 2021 +0100 libcpp: Fix up ##__VA_OPT__ handling [PR89971] In the following testcase we incorrectly error about pasting / token with padding token (which is a result of __VA_OPT__); instead we should like e.g. for ##arg where arg is empty macro argument clear PASTE_LEFT flag of the previous token if __VA_OPT__ doesn't add any real tokens (which can happen either because the macro doesn't have any tokens passed to ... (i.e. __VA_ARGS__ expands to empty) or when __VA_OPT__ doesn't have any tokens in between ()s). 2021-12-30 Jakub Jelinek <ja...@redhat.com> PR preprocessor/89971 libcpp/ * macro.c (replace_args): For ##__VA_OPT__, if __VA_OPT__ expands to no tokens at all, drop PASTE_LEFT flag from the previous token. gcc/testsuite/ * c-c++-common/cpp/va-opt-9.c: New test. (cherry picked from commit 5545d1edcbdb1701443f94dde7ec97c5ce3e1a6c)
