> This makes no sense. Preprocessor options have no place in CFLAGS, which is for compiler options. Technically true, but pkg-config does not distinguish betwe

> This makes no sense. Preprocessor options have no place in CFLAGS, which is for compiler options. Technically true, but pkg-config does not distinguish between CFLAGS and CPPFLAGS. > If your distribution installs headers outside of the preprocessor path (or somewhere inside CPATH or C_INCLUDE_PATH), then I'd say that this distribution is broken Both Debian and Red Hat use this path. These libraries are designed to be located with pkg-config, so you can install them anywhere, and everything works as expected.