/usr/share/cmake-2.8/Modules/Compiler/XL-C.cmake is in cmake-data 2.8.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | include(Compiler/XL)
__compiler_xl(C)
set(CMAKE_C_FLAGS_RELEASE_INIT "${CMAKE_C_FLAGS_RELEASE_INIT} -DNDEBUG")
set(CMAKE_C_FLAGS_MINSIZEREL_INIT "${CMAKE_C_FLAGS_MINSIZEREL_INIT} -DNDEBUG")
# -qthreaded = Ensures that all optimizations will be thread-safe
# -qalias=noansi = Turns off type-based aliasing completely (safer optimizer)
# -qhalt=e = Halt on error messages (rather than just severe errors)
SET(CMAKE_C_FLAGS_INIT "-qthreaded -qalias=noansi -qhalt=e")
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