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CMake/Modules/Compiler/GNU-C.cmake

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Split GNU compiler information files This moves GNU compiler flags into new-style modules Compiler/GNU-<lang>.cmake Platform/<os>-GNU-<lang>.cmake We use language-independent helper modules Compiler/GNU.cmake Platform/<os>-GNU.cmake to define macros consolidating the information.
2009-12-02 17:52:00 +03:00
include(Compiler/GNU)
__compiler_gnu(C)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
elseif (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c89")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu89")
endif()
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
Features: Record C/CXX dialect flags for GNU 4.6. This release was prior to standardization of C11/CXX11.
2015-01-11 18:09:50 +03:00
endif()
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
Features: Record C/CXX dialect flags for GNU 4.6. This release was prior to standardization of C11/CXX11.
2015-01-11 18:09:50 +03:00
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
elseif (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
Features: Record C/CXX dialect flags for GNU 4.6. This release was prior to standardization of C11/CXX11.
2015-01-11 18:09:50 +03:00
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c1x")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu1x")
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
endif()
Features: Fix the default C dialect for Clang and GNU. 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.
2014-11-18 01:24:31 +03:00
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
set(CMAKE_C_STANDARD_DEFAULT 11)
Features: Populate CMAKE_<LANG>_STANDARD_DEFAULT only for supported compilers. If no compiler feature information is known for a given compiler version, do not set a language standard default either. The two settings must be recorded consistently.
2015-02-05 00:04:18 +03:00
elseif(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
Features: Fix the default C dialect for Clang and GNU. 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.
2014-11-18 01:24:31 +03:00
set(CMAKE_C_STANDARD_DEFAULT 90)
endif()
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
macro(cmake_record_c_compile_features)
macro(_get_gcc_features std_version list)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
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record_compiler_features(C "${std_version}" ${list})
Features: Extend concept to C language. Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
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endmacro()
Features: Ensure appropriate return value from feature test macros. GNU-CXX already has complex logic and sets the _result to 0 before tests which may set it to something else. Change the other modules to be consistent with that.
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set(_result 0)
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
2014-11-12 01:06:03 +03:00
_get_gcc_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
Features: Fix GNU 4.4 and 4.5 C standard level flags The C90 flags were only the "89" versions until GNU 4.5. The C11 flags were not introduced until GNU 4.6.
2015-01-21 23:45:39 +03:00
endif()
if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
if (_result EQUAL 0)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
2014-11-12 01:06:03 +03:00
_get_gcc_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
Features: Extend concept to C language. Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
2013-11-04 04:15:43 +04:00
endif()
if (_result EQUAL 0)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
2014-11-12 01:06:03 +03:00
_get_gcc_features(${CMAKE_C90_STANDARD_COMPILE_OPTION} CMAKE_C90_COMPILE_FEATURES)
Features: Extend concept to C language. 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.
2013-11-04 04:15:43 +04:00
endif()
endif()
endmacro()