build: check first before enabling -D_FORTIFY_SOURCE=3 With --disable-optimization, _FORTIFY_SOURCE=3 produces compiler warnings/errors: /usr/include/features.h:422:4: error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp] 422 | # warning _FORTIFY_SOURCE requires compiling with optimization (-O) Before enabling it for --enable-maintainer-mode, check the compiler doesn't fail when using the flag.

Diffstat

1 files changed, 15 insertions(+), 1 deletions(-)