mirror of
https://github.com/Kitware/CMake.git
synced 2026-01-05 21:31:08 -06:00
d13758514c
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.
53 lines
1.9 KiB
CMake
53 lines
1.9 KiB
CMake
include(Compiler/GNU)
|
|
__compiler_gnu(C)
|
|
|
|
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5)
|
|
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
|
|
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
|
|
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()
|
|
|
|
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
|
|
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
|
|
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
|
|
endif()
|
|
|
|
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
|
|
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
|
|
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
|
|
elseif (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
|
|
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c1x")
|
|
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu1x")
|
|
endif()
|
|
|
|
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
|
|
if (NOT CMAKE_C_COMPILER_FORCED)
|
|
if (NOT CMAKE_C_STANDARD_COMPUTED_DEFAULT)
|
|
message(FATAL_ERROR "CMAKE_C_STANDARD_COMPUTED_DEFAULT should be set for ${CMAKE_C_COMPILER_ID} (${CMAKE_C_COMPILER}) version ${CMAKE_C_COMPILER_VERSION}")
|
|
endif()
|
|
set(CMAKE_C_STANDARD_DEFAULT ${CMAKE_C_STANDARD_COMPUTED_DEFAULT})
|
|
endif()
|
|
endif()
|
|
|
|
|
|
macro(cmake_record_c_compile_features)
|
|
macro(_get_gcc_features std_version list)
|
|
record_compiler_features(C "${std_version}" ${list})
|
|
endmacro()
|
|
|
|
set(_result 0)
|
|
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
|
|
_get_gcc_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
|
|
endif()
|
|
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
|
|
if (_result EQUAL 0)
|
|
_get_gcc_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
|
|
endif()
|
|
if (_result EQUAL 0)
|
|
_get_gcc_features(${CMAKE_C90_STANDARD_COMPILE_OPTION} CMAKE_C90_COMPILE_FEATURES)
|
|
endif()
|
|
endif()
|
|
endmacro()
|