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* Record C compile features flags for MinGW Clang on WindowsBrad King2017-11-011-1/+1
| | | | | | | | | | | | | | This was done for C++ by commit v3.5.0-rc1~69^2 (Record compile features for MinGW Clang on Windows, 2016-01-11). Make the same change for C. The `UNIX` condition on Clang C compiler features was already dropped by refactoring in commit v3.9.0-rc1~17^2~4 (Compilers: Port to use default cmake_record_lang_compile_features macros, 2017-05-10). Our documentation already claims support for this combination. This was simply an oversight when support was added for MinGW Clang C++. Issue: #15897 Issue: #15943
* Clang: Do not add '-std=' options when simulating MSVCRuben Van Boxem2017-06-271-7/+23
| | | | | | | The `cl.exe` style command line does not accept the `-std=` options. Instead behave like MSVC where we don't define standard levels. Fixes: #16266
* Compilers: Port to use default cmake_record_lang_compile_features macrosChuck Atkins2017-05-301-15/+0
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* Clang: Use common compiler macros for language standard defaultChuck Atkins2017-05-021-15/+1
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* Features: Make feature recording conditions more consistentBrad King2016-12-021-1/+3
| | | | | | | | | Condition all calls to `_record_compiler_features_{c,cxx}` on `_result EQUAL 0` so that adding new language standards later does not need to update them. Avoid some duplicate compiler version checks by conditioning C11 and CXX14 feature recording on the existence of `CMAKE_{C11,CXX14}_STANDARD_COMPILE_OPTION` (whose setting already used the version check).
* Features: Centralize per-compiler recording macrosBrad King2016-11-021-7/+3
| | | | | Simplify and de-duplicate per-compiler feature recording macros and convert to a centralized per-language macro.
* Project: Guess default standard dialect if compiler was forced (#15852)Brad King2015-11-191-0/+7
| | | | | | | | | | | | | | | | | | | | | Prior to commit v3.4.0-rc1~71^2 (Project: Determine default language dialect for the compiler, 2015-09-15) we always guessed the default language standard dialect based on the compiler version. This was not reliable so that commit switched to computing the default language standard dialect while detecting the compiler id. When a toolchain file uses CMakeForceCompiler to set the compiler id then the detection does not occur. Therefore commit v3.4.0-rc1~54^2 (Project: Don't require computed default dialect if compiler was forced, 2015-09-22) made the lack of detection an error only if the compiler was not forced. However, this means that projects using CMakeForceCompiler no longer even get the guess that we had before so <LANG>_COMPILER does not work. Due to the sophistication of CMake's compiler detection logic projects should be ported away from using CMakeForceCompiler. In the meantime, restore a guess of the default language standard dialect when the compiler is forced.
* Project: Don't require computed default dialect if compiler was forced.Stephen Kelly2015-09-221-3/+5
| | | | | | | | | | | | | | | | Commit 7235334a (Project: Determine default language dialect for the compiler., 2015-09-15) introduced a mechanism to determine the default dialect used for the running compiler. If conditions in the <CompilerId>-<Lang>.cmake file are such that compile features for that version of the compiler should be supported, the _DEFAULT_STANDARD is set to the computed value. However, the CMakeForceCompiler module allows users to bypass execution of the compiler by CMake. In that case, do not set the _DEFAULT_STANDARD variable at all, which effectively disables the compile-features where the module is used. No compile features have ever been recorded where the module is used so no functionality is lost.
* Project: Determine default language dialect for the compiler.Stephen Kelly2015-09-181-4/+5
| | | | | | Use the __cplusplus and __STDC_VERSION__ macros to automatically determine the default dialect for the compiler while determining its id and version.
* Features: Ensure appropriate return value from feature test macros.Stephen Kelly2015-01-151-2/+1
| | | | | | | GNU-CXX already has complex logic and sets the _result to 0 before tests which may set it to something else. Change the other modules to be consistent with that.
* Merge branch 'default-lang-dialect' into step2Stephen Kelly2014-11-201-3/+7
|\ | | | | | | | | Conflicts: Modules/Compiler/Clang-C.cmake
| * Features: Fix the default C dialect for Clang and GNU.Stephen Kelly2014-11-201-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Clang 3.4 uses C99 by default, and Clang 3.6 uses C11 by default: http://thread.gmane.org/gmane.comp.compilers.clang.devel/39379 GNU 4.9 uses C90 by default, and GNU 5.0 uses C11 by default: https://gcc.gnu.org/gcc-5/changes.html Test that the default compiler settings result in the expected dialect macros being defined for both C and CXX. Remove the unused main.c file from the CompileFeatures unit test.
| * Features: Fix references to CXX compiler version in Clang-C.cmake.Stephen Kelly2014-11-181-2/+2
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* | Features: Use the correct dialect flag when recording features.Stephen Kelly2014-11-121-4/+4
|/ | | | | Avoid using -std=c++1y for compilers which support -std=c++14, for example.
* Features: Record for Clang 3.4Stephen Kelly2014-05-201-0/+36
| | | | Clang 3.4 supports all features currently known to CMake.
* Clang: Split Compiler/Clang* modules out from GNU (#13550)Brad King2012-09-191-1/+2
| | | | | | | While Clang presents an almost identical interface to GNU there will be some differences. Split the compiler information modules to allow separate rules for Clang. Start by loading the GNU rules but leave a place to add Clang-specific information.
* Recognize Clang C and C++ compilers (see #10693)Brad King2010-05-171-0/+1
Map to the platform and compiler information for GNU because the compilers are command-line compatible for common operations. Later we can add Clang-specific features as necessary. We honor the preferred capitalization is "Clang", not the common mis-spelling "CLang".
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