Fix issue in CMakeLists.txt.
Created by: seanlis
CMAKE_COMPILER_IS_GNUC should be CMAKE_COMPILER_IS_GNUCC. There is no variable named CMAKE_COMPILER_IS_GNUC, so the statements under if would never run.
Created by: seanlis
CMAKE_COMPILER_IS_GNUC should be CMAKE_COMPILER_IS_GNUCC. There is no variable named CMAKE_COMPILER_IS_GNUC, so the statements under if would never run.