http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58964
Bug ID: 58964 Summary: [4.9 Regression] Bogus message: error: -mpreferred-stack-boundary=0 is not between 2 and 12 Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: d.g.gorbachev at gmail dot com Host: i686-pc-linux-gnu Target: i686-pc-linux-gnu Build: i686-pc-linux-gnu GCC 4.9.0 20131027 (experimental) /rev. 204109/ $ cat > 1.c __attribute__((target("cld"))) void foo(void) { } ^D $ gcc -mpreferred-stack-boundary=3 1.c 1.c:4:1: error: -mpreferred-stack-boundary=0 is not between 2 and 12 GCC 20130929 /rev. 203020/ - works.