Ensure ffs, strndup, strlcat, etc. aren't defined by our headers
if they're already defined in the system headers.
This does export the HAVE_FFS, HAVE_STRNDUP, etc. definitions to drivers,
but if you built the Xserver with a libc that had those, and then build
the drivers with a less capable libc, you're going to have problems anyway,
and this should solve some reported problems with conflicts between our
strndup definition and gcc magic for it.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
8b6a750097