cmake/Modules/Compiler/XL-CXX.cmake

include(Compiler/XL)
__compiler_xl(CXX)
set(CMAKE_CXX_FLAGS_RELEASE_INIT "${CMAKE_CXX_FLAGS_RELEASE_INIT} -DNDEBUG")
set(CMAKE_CXX_FLAGS_MINSIZEREL_INIT "${CMAKE_CXX_FLAGS_MINSIZEREL_INIT} -DNDEBUG")

# -qthreaded     = Ensures that all optimizations will be thread-safe
# -qhalt=e       = Halt on error messages (rather than just severe errors)
set(CMAKE_CXX_FLAGS_INIT "-qthreaded -qhalt=e")

set(CMAKE_CXX_COMPILE_OBJECT
  "<CMAKE_CXX_COMPILER> -+ <DEFINES> <FLAGS> -o <OBJECT> -c <SOURCE>")