https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64576
Bug ID: 64576 Summary: Preprocessor Error With 5.0 not with 4.9.2 Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor Assignee: unassigned at gcc dot gnu.org Reporter: joel at gcc dot gnu.org Created attachment 34431 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34431&action=edit Cut down example showing error The attached example is based on code that has compiled fine for about 15 years. $ ~/test-gcc/install-head/bin/powerpc-rtems4.11-gcc -meabi -mcpu=603e -msdata=sysv -O2 -c b1.c b1.c:1:36: error: '#' is not followed by a macro parameter #define SETBAT_ASM(batu, batl, u, l)\ ^ The macro may have issues but it gcc has been happy with it for a LONG time. :)