The CFLAGS and CXXFLAGS exports appear to be noops now and LDFLAGS is ignored entirely. However, due to Patch2, that shouldn't be needed either and so you could just drop all those.

The -- .. argument to %cmake seems odd.

@Vogtinator, @alarrosa, @cgiboudeaux, @christiantrippe, @luca_b, @wolfi323: review reminder