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Merge topic 'WCDH-thread_local-portability' 

998e9c10 WCDH: Add feature portability for thread_local.
This commit is contained in:
Brad King 2015-01-08 15:04:25 -05:00 committed by CMake Topic Stage
parent 44b2dcb2e0 998e9c1094
commit 7ecbade887
2 changed files with 22 additions and 0 deletions
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7
Help/release/dev/WCDH-thread_local.rst Normal file
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@ -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.

15
Modules/WriteCompilerDetectionHeader.cmake
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@ -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
@ -571,6 +572,20 @@ function(write_compiler_detection_header
# else
# define ${def_value} static_cast<void*>(0)
# endif
\n")
endif()
if (feature STREQUAL cxx_thread_local)
set(def_value "${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)