CMAKE_C_FLAGS is handled as a string and not a list by CMake. Change-Id: Ia0cfb38817edef2f212a04b26601f6aea76a5684
and other warnings enabled (-Wunused-value) Change-Id: Ie3605628b4cbfb5bfd1e847cc504cb96f2825388
The goal is not to replace our autotools configuration, but to provide a minimal CMake file that can build the lib, cwebp and dwebp. Change-Id: I3be343bd698d118c5f00172449d232d87e868f23