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40 lines
1.3 KiB
40 lines
1.3 KiB
enable_language
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---------------
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Enable languages (CXX/C/OBJC/OBJCXX/Fortran/etc)
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.. code-block:: cmake
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enable_language(<lang>... [OPTIONAL])
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Enables support for the named languages in CMake. This is the same as
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the :command:`project` command but does not create any of the extra
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variables that are created by the project command. Example languages
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are ``CXX``, ``C``, ``CUDA``, ``OBJC``, ``OBJCXX``, ``Fortran``,
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``HIP``, ``ISPC``, and ``ASM``.
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.. versionadded:: 3.8
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Added ``CUDA`` support.
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.. versionadded:: 3.16
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Added ``OBJC`` and ``OBJCXX`` support.
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.. versionadded:: 3.18
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Added ``ISPC`` support.
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.. versionadded:: 3.21
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Added ``HIP`` support.
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If enabling ``ASM``, enable it last so that CMake can check whether
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compilers for other languages like ``C`` work for assembly too.
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This command must be called in file scope, not in a function call.
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Furthermore, it must be called in the highest directory common to all
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targets using the named language directly for compiling sources or
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indirectly through link dependencies. It is simplest to enable all
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needed languages in the top-level directory of a project.
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The ``OPTIONAL`` keyword is a placeholder for future implementation and
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does not currently work. Instead you can use the :module:`CheckLanguage`
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module to verify support before enabling.
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