[CMake] CPPFLAGS

[Renaud Detry]

Hello,

CMake takes many variables from the shell env (CC, CXX, CFLAGS,
CXXFLAGS, LDFLAGS, ...) but CPPFLAGS seems to be ignored, forcing
-I<include dir> in CFLAGS/CXXFLAGS. I'm using
cmake-2.4.7-Darwin-universal. Is this intentional?

Thanks,
Renaud.