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| author | Stephen Kelly <steveire@gmail.com> | 2014-05-15 09:32:30 (GMT) |
|---|---|---|
| committer | Stephen Kelly <steveire@gmail.com> | 2014-05-21 15:22:32 (GMT) |
| commit | 0dfe395e3cb1a720c4853087db554a6827feaadb (patch) | |
| tree | 83d9cbe0ee9843bc4aa0012d9a7064a3522ba018 /Help | |
| parent | aa8a6fcee8c67b0516efcd745fb1d7a66d249096 (diff) | |
| download | CMake-0dfe395e3cb1a720c4853087db554a6827feaadb.zip CMake-0dfe395e3cb1a720c4853087db554a6827feaadb.tar.gz CMake-0dfe395e3cb1a720c4853087db554a6827feaadb.tar.bz2 | |
Features: Add COMPILE_FEATURES generator expression.
Allow setting build properties based on the features available
for a target. The availability of features is determined at
generate-time by evaluating the link implementation.
Ensure that the <LANG>_STANDARD determined while evaluating
COMPILE_FEATURES in the link implementation is not lower than that
provided by the INTERFACE of the link implementation. This is
similar to handling of transitive properties such as
POSITION_INDEPENDENT_CODE.
Diffstat (limited to 'Help')
| -rw-r--r-- | Help/manual/cmake-generator-expressions.7.rst | 6 | ||||
| -rw-r--r-- | Help/release/dev/compile-language-features.rst | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst index dfda8dc..9184580 100644 --- a/Help/manual/cmake-generator-expressions.7.rst +++ b/Help/manual/cmake-generator-expressions.7.rst @@ -83,6 +83,12 @@ otherwise expands to nothing. else ``0``. If the policy was not set, the warning message for the policy will be emitted. This generator expression only works for a subset of policies. +``$<COMPILE_FEATURES:feature[,feature]...>`` + ``1`` if all of the ``feature`` features are available for the 'head' + target, and ``0`` otherwise. If this expression is used while evaluating + the link implementation of a target and if any dependency transitively + increases the required :prop_tgt:`C_STANDARD` or :prop_tgt:`CXX_STANDARD` + for the 'head' target, an error is reported. Informational Expressions ========================= diff --git a/Help/release/dev/compile-language-features.rst b/Help/release/dev/compile-language-features.rst index fe72e39..d10e22b 100644 --- a/Help/release/dev/compile-language-features.rst +++ b/Help/release/dev/compile-language-features.rst @@ -22,3 +22,7 @@ target-language-features * New :command:`target_compile_features` command allows populating the :prop_tgt:`COMPILE_FEATURES` target property, just like any other build variable. + +* New ``COMPILE_FEATURES`` + :manual:`generator expression <cmake-generator-expressions(7)>` allows + setting build properties based on available compiler features. |