CMake: Require that the C compiler supports C99 or a newer standard.
Thanks to autoantwort for reporting the issue and suggesting a different patch: https://github.com/tukaani-project/xz/pull/42
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@ -74,6 +74,14 @@ string(REGEX REPLACE
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# Among other things, this gives us variables xz_VERSION and xz_VERSION_MAJOR.
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# Among other things, this gives us variables xz_VERSION and xz_VERSION_MAJOR.
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project(xz VERSION "${XZ_VERSION}" LANGUAGES C)
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project(xz VERSION "${XZ_VERSION}" LANGUAGES C)
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# We need a compiler that supports enough C99 or newer (variable-length arrays
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# aren't needed, those are optional in C17). Setting CMAKE_C_STANDARD here
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# makes it the default for all targets. It doesn't affect the INTERFACE so
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# liblzma::liblzma won't end up with INTERFACE_COMPILE_FEATURES "c_std_99"
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# (the API headers are C89 and C++ compatible).
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set(CMAKE_C_STANDARD 99)
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set(CMAKE_C_STANDARD_REQUIRED ON)
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# On Apple OSes, don't build executables as bundles:
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# On Apple OSes, don't build executables as bundles:
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set(CMAKE_MACOSX_BUNDLE OFF)
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set(CMAKE_MACOSX_BUNDLE OFF)
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