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Diffstat (limited to 'Help/manual/cmake-generator-expressions.7.rst')
| -rw-r--r-- | Help/manual/cmake-generator-expressions.7.rst | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst index bddb174..dc5621a 100644 --- a/Help/manual/cmake-generator-expressions.7.rst +++ b/Help/manual/cmake-generator-expressions.7.rst @@ -97,7 +97,7 @@ Available logical expressions are: compile features and a list of supported compilers. ``$<COMPILE_LANGUAGE:lang>`` ``1`` when the language used for compilation unit matches ``lang``, - otherwise ``0``. This expression used to specify compile options for + otherwise ``0``. This expression may be used to specify compile options for source files of a particular language in a target. For example, to specify the use of the ``-fno-exceptions`` compile option (compiler id checks elided): @@ -109,10 +109,12 @@ Available logical expressions are: PRIVATE $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions> ) - This generator expression has limited use because it is not possible to - use it with the Visual Studio generators. Portable buildsystems would - not use this expression, and would create separate libraries for each - source file language instead: + Note that with :ref:`Visual Studio Generators` there is no way to represent + target-wide flags separately for ``C`` and ``CXX`` languages. Under these + generators, target-wide flags for both C and C++ sources will be evaluated + using ``CXX`` if there are any C++ sources and otherwise using ``C``. + A workaround is to create separate libraries for each source file language + instead: .. code-block:: cmake |