NM_COMPILER_WARNINGS still works the same, but
rename variables to have a CFLAGS_* prefix.
Also cleanup the construction of CFLAGS by appending
to CFLAGS_MORE_WARNINGS variable instead of appending
to CFLAGS, and resetting to SAVE_CFLAGS.
Signed-off-by: Thomas Haller <thaller@redhat.com>
clang does not exit with error when it is called with an
unrecognized (warning) option. Instead it just prints
a warning that makes the configure script believe the
warning is supported. Later, during build we might pass
-Werror, which causes clang to fail due to unrecognized
arguments.
Fix the script to detect compiler warnings by passing
'-Werror=unknown-warning-option', which lets clang fail too.
Signed-off-by: Thomas Haller <thaller@redhat.com>
First, -Wstrict-prototypes wasn't actually getting used because
-Werror was already in CFLAGS and AC_TRY_COMPILE doesn't produce
main() functions with valid strict prototypes. Suck. But even
fixing that, the WiMAX SDK won't build with the flag, so just rip
it out.
