I've seen this errror before. It's uusally caused by upstream
accidentally overriding CFLAGS instead appending to already set CFLAGS, which breaks
fedora builds. Look for something like "set *CFLAGS* (foo bar)" in
CMakeLists.txt files, and change it to *append* to the already existing value (coming from
fedora settings), instead of overriding it.
Actually, upstream should prepend its own CFLAGS et al to give
precedence to user-defined flags.
Dridi