https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69707
Bug ID: 69707 Summary: FAIL: parallel-dims.c test for excess errors with -flto -fno-use-linker-plugin Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: minor Priority: P3 Component: lto Assignee: unassigned at gcc dot gnu.org Reporter: vries at gcc dot gnu.org Target Milestone: --- gcc is called with -fdiagnostics-color=never, but lto1 is called without it: ... lto1 -quiet -m64 -O2 -fmath-errno -fsigned-zeros -ftrapping-math -fno-trapv -fno-openmp -foffload-abi=lp64 -fno-diagnostics-show-caret -fopenacc -ftree-parallelize-loops=32 @/tmp/cc9vUz7t -o parallel-dims.s ... It seems lto-wrapper drops it. Running lto1 diagnostics color confuses the 'test for excess errors'.