https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67030
Bug ID: 67030 Summary: [6 Regression] ARM bootstrap failure due to [-Werror=tautological-compare] Product: gcc Version: 6.0 Status: UNCONFIRMED Keywords: build Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: ktkachov at gcc dot gnu.org CC: mpolacek at gcc dot gnu.org Target Milestone: --- Target: arm I'm getting a bootstrap failure in stage 2 on arm-none-linux-gnueabihf due to the new warning: $SRC/gcc/cfgexpand.c: In function 'long long int expand_one_var(tree, bool, bool)': $SRC/gcc/defaults.h:1156:55: error: self-comparison always evaluates to false [-Werror=tautological-compare] #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY) Seems we need to be a bit smarter when it comes to macro expansions?