diff options
| -rw-r--r-- | Help/release/dev/WCDH-thread_local.rst | 7 | ||||
| -rw-r--r-- | Modules/WriteCompilerDetectionHeader.cmake | 15 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Help/release/dev/WCDH-thread_local.rst b/Help/release/dev/WCDH-thread_local.rst new file mode 100644 index 0000000000..44516a78e0 --- /dev/null +++ b/Help/release/dev/WCDH-thread_local.rst @@ -0,0 +1,7 @@ +WriteCompilerDetectionHeader thread_local portability +----------------------------------------------------- + +* The :module:`WriteCompilerDetectionHeader` module learned to + create a define for portability of the cxx_thread_local feature. The define + expands to either the C++11 ``thread_local`` keyword, or a + pre-standardization compiler-specific equivalent, as appropriate. diff --git a/Modules/WriteCompilerDetectionHeader.cmake b/Modules/WriteCompilerDetectionHeader.cmake index 36b9706e01..d61358fa2e 100644 --- a/Modules/WriteCompilerDetectionHeader.cmake +++ b/Modules/WriteCompilerDetectionHeader.cmake @@ -194,6 +194,7 @@ # ``cxx_static_assert`` ``<PREFIX>_STATIC_ASSERT_MSG`` ``static_assert`` # ``cxx_attribute_deprecated`` ``<PREFIX>_DEPRECATED`` ``[[deprecated]]`` # ``cxx_attribute_deprecated`` ``<PREFIX>_DEPRECATED_MSG`` ``[[deprecated]]`` +# ``cxx_thread_local`` ``<PREFIX>_THREAD_LOCAL`` ``thread_local`` # ============================= ================================ ===================== # # A use-case which arises with such deprecation macros is the deprecation @@ -573,6 +574,20 @@ function(write_compiler_detection_header # endif \n") endif() + if (feature STREQUAL cxx_thread_local) + set(def_value "${prefix_arg}_THREAD_LOCAL") + set(file_content "${file_content} +# if ${def_name} +# define ${def_value} thread_local +# elif ${prefix_arg}_COMPILER_IS_GNU || ${prefix_arg}_COMPILER_IS_Clang || ${prefix_arg}_COMPILER_IS_AppleClang +# define ${def_value} __thread +# elif ${prefix_arg}_COMPILER_IS_MSVC +# define ${def_value} __declspec(thread) +# else +// ${def_value} not defined for this configuration. +# endif +\n") + endif() if (feature STREQUAL cxx_attribute_deprecated) set(def_name ${prefix_arg}_${feature_PP}) set(def_value "${prefix_arg}_DEPRECATED") |