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Also, in WCDH add MSVC Compatibility for cxx_align{of,as}.
Co-Author: Stephen Kelly <steveire@gmail.com>
Co-Author: Brad King <brad.king@kitware.com>
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It has similar C++11 capabilities compared to GCC 4.8.
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Otherwise we generate defines for C/CXX features unguarded by the presence of
the __cplusplus macro and available to the wrong compiler.
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The SolarisStudio compiler module uses language specific files.
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4ce110bb Tests: Revert workaround for COMPILE_FEATURES genex bug
0b7e7e27 Revert topic 'feature_record_msvc'
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Revert commits:
2d738ce3 Help: Add notes for topic 'feature_record_msvc'
f73718c9 Features: Enable writing of MSVC compiler feature header.
64c30bdc Features: Record for MSVC C++ 2015 and MSVC C 2010-2015.
225c0ef8 Features: Record for MSVC 2010-2013.
This topic was merged to master prematurely, so remove it.
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2d738ce3 Help: Add notes for topic 'feature_record_msvc'
f73718c9 Features: Enable writing of MSVC compiler feature header.
64c30bdc Features: Record for MSVC C++ 2015 and MSVC C 2010-2015.
225c0ef8 Features: Record for MSVC 2010-2013.
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Notes:
VS2015 and above are the only MSVC versions to support cxx_final, so remove
usages from the tests, and instead only test for cxx_override.
VS2012 and above to conform to cxx_decltype_incomplete_return_types
proposal, but without support for auto return types the dcl.type.simple
example in the proposal doesn't compile.
VS2013 and above to conform to the updated cxx_contextual_conversions proposal,
but VS2010 and above pass the test.
Compilers such as MSVC have no explicit flags to enable C++11 mode,
it just is always on. So only run the link tests with compilers that require
a flag to specify the language version.
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AppleClang does not support the cxx_thread_local feature, even
though it is based on a Clang version which does support the
feature.
http://stackoverflow.com/a/23850891/2428389
A possible reason for that is that thread_local might be used as
a variable in existing Apple SDK headers.
Extend the WriteCompilerDetectionHeader module to generate a define
for that feature with portability fallbacks. For the avoidance of
making it easy to write code which looks correct but which has odd
runtime behavior, don't set the define symbol at all if no
equivalent keyword is known.
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Apple's Clang 5.1 already supports most of the C and C++ features CMake
enumerates.
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4cf5179c WCDH: Make it possible to generate multiple files.
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Extend the write_compiler_detection_header interface to allow
specifying a location for supplementary files, and getting the
list of resulting files as a variable.
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Remove the mention of it from the docs.
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The prefix must be a C-identifier because it is written as the
prefix of preprocessor macros and possibly structs.
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Enable the alignment features for Clang.
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The DECL part is redundant, and the language part is not needed. The
source language and context already determines the language, so there
is no need to repeat it in the define name.
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ddec418a Features: Add compiler version support to WriteCompilerDetectionHeader.
b7029576 Project: Add configurable name for version computation macros.
78acaafe Project: Separate simulated compiler id from version detection.
567af1a5 WCDH: Issue a better message for version compatibility.
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Link to it from the documentation of related properties, variables
and commands.
Extend the cmake-developer(7) documentation with notes on
extending feature support for compilers.
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Clang 3.4 supports all features currently known to CMake.
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Add properties and variables corresponding to CXX equivalents.
Add features for c_function_prototypes (C90), c_restrict (C99),
c_variadic_macros (C99) and c_static_assert (C11). This feature
set can be extended later.
Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader
to conditionally represent the c_restrict feature.
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Provide a function to write a portable header to detect compiler
features. Generate a preprocessor #error for unknown compilers
and compiler versions whose features are not yet recorded. This
error condition might be relaxed in the future, but for now it
is useful for verification of expectations.
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