outlined the compiler feature tests to improve script readability
This commit is contained in:
Mario Werner
parent
3019a8c1fd
commit
0fb474be3a
@ -23,39 +23,12 @@ message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
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include(CheckCXXCompilerFlag)
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check_cxx_compiler_flag(-std=c++11 HAVE_STD_CPP11_FLAG)
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if (HAVE_STD_CPP11_FLAG)
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# Check if including cmath works with -std=c++11 and -O3.
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# It may not in MinGW due to bug http://ehc.ac/p/mingw/bugs/2250/.
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set(CMAKE_REQUIRED_FLAGS "-std=c++11 -O3")
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check_cxx_source_compiles("
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#include <cmath>
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int main() {}" FMT_CPP11_CMATH)
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# Check if including <unistd.h> works with -std=c++11.
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# It may not in MinGW due to bug http://sourceforge.net/p/mingw/bugs/2024/.
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check_cxx_source_compiles("
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#include <unistd.h>
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int main() {}" FMT_CPP11_UNISTD_H)
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if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
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set(CPP11_FLAG -std=c++11)
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else ()
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check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)
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if (HAVE_STD_CPP11_FLAG)
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set(CPP11_FLAG -std=gnu++11)
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endif ()
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endif ()
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set(CMAKE_REQUIRED_FLAGS )
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else ()
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check_cxx_compiler_flag(-std=c++0x HAVE_STD_CPP0X_FLAG)
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if (HAVE_STD_CPP0X_FLAG)
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set(CPP11_FLAG -std=c++0x)
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endif ()
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endif ()
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set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
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"${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
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include(testCxx11)
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if (CMAKE_GENERATOR MATCHES "Visual Studio")
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# If Microsoft SDK is installed create script run-msbuild.bat that
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# calls SetEnv.cmd to to set up build environment and runs msbuild.
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58
support/cmake/testCxx11.cmake
Normal file
58
support/cmake/testCxx11.cmake
Normal file
@ -0,0 +1,58 @@
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include(CheckCXXCompilerFlag)
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check_cxx_compiler_flag(-std=c++11 HAVE_STD_CPP11_FLAG)
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if (HAVE_STD_CPP11_FLAG)
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# Check if including cmath works with -std=c++11 and -O3.
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# It may not in MinGW due to bug http://ehc.ac/p/mingw/bugs/2250/.
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set(CMAKE_REQUIRED_FLAGS "-std=c++11 -O3")
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check_cxx_source_compiles("
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#include <cmath>
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int main() {}" FMT_CPP11_CMATH)
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# Check if including <unistd.h> works with -std=c++11.
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# It may not in MinGW due to bug http://sourceforge.net/p/mingw/bugs/2024/.
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check_cxx_source_compiles("
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#include <unistd.h>
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int main() {}" FMT_CPP11_UNISTD_H)
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if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
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set(CPP11_FLAG -std=c++11)
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else ()
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check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)
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if (HAVE_STD_CPP11_FLAG)
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set(CPP11_FLAG -std=gnu++11)
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endif ()
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endif ()
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set(CMAKE_REQUIRED_FLAGS )
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else ()
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check_cxx_compiler_flag(-std=c++0x HAVE_STD_CPP0X_FLAG)
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if (HAVE_STD_CPP0X_FLAG)
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set(CPP11_FLAG -std=c++0x)
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endif ()
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endif ()
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set(CMAKE_REQUIRED_FLAGS ${CPP11_FLAG})
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# Check if variadic templates are working and not affected by GCC bug 39653:
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39653
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check_cxx_source_compiles("
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template <class T, class ...Types>
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struct S { typedef typename S<Types...>::type type; };
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int main() {}" SUPPORTS_VARIADIC_TEMPLATES)
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# Check if initializer lists are supported.
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check_cxx_source_compiles("
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#include <initializer_list>
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int main() {}" SUPPORTS_INITIALIZER_LIST)
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# Check if enum bases are available
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check_cxx_source_compiles("
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enum C : char {A};
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int main() {}"
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SUPPORTS_ENUM_BASE)
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# Check if type traits are available
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check_cxx_source_compiles("
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#include <type_traits>
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class C { void operator=(const C&); };
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int main() { static_assert(!std::is_copy_assignable<C>::value, \"\"); }"
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SUPPORTS_TYPE_TRAITS)
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set(CMAKE_REQUIRED_FLAGS )
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@ -28,18 +28,8 @@ endif ()
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# Check if variadic templates are working and not affected by GCC bug 39653:
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39653
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check_cxx_source_compiles("
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template <class T, class ...Types>
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struct S { typedef typename S<Types...>::type type; };
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int main() {}" FMT_VARIADIC_TEMPLATES)
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# Check if initializer lists are supported.
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check_cxx_source_compiles("
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#include <initializer_list>
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int main() {}" FMT_INITIALIZER_LIST)
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if (NOT FMT_VARIADIC_TEMPLATES OR NOT FMT_INITIALIZER_LIST)
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add_definitions(-DGTEST_LANG_CXX11=0)
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if (NOT SUPPORTS_VARIADIC_TEMPLATES OR NOT SUPPORTS_INITIALIZER_LIST)
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target_compile_definitions(gmock PUBLIC GTEST_LANG_CXX11=0)
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endif ()
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# Workaround a bug in implementation of variadic templates in MSVC11.
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@ -91,11 +81,7 @@ if (CPP11_FLAG)
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set_target_properties(util-test PROPERTIES COMPILE_FLAGS ${CPP11_FLAG})
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endif ()
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check_cxx_source_compiles("
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enum C : char {A};
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int main() {}"
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HAVE_ENUM_BASE)
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if (HAVE_ENUM_BASE)
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if (SUPPORTS_ENUM_BASE)
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set_target_properties(util-test
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PROPERTIES COMPILE_DEFINITIONS "FMT_USE_ENUM_BASE=1")
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endif ()
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@ -104,12 +90,7 @@ foreach (src ${FMT_SOURCES})
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set(FMT_TEST_SOURCES ${FMT_TEST_SOURCES} ../${src})
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endforeach ()
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check_cxx_source_compiles("
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#include <type_traits>
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class C { void operator=(const C&); };
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int main() { static_assert(!std::is_copy_assignable<C>::value, \"\"); }"
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HAVE_TYPE_TRAITS)
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if (HAVE_TYPE_TRAITS)
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if (SUPPORTS_TYPE_TRAITS)
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foreach (target format-test util-test)
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set_target_properties(${target}
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PROPERTIES COMPILE_DEFINITIONS "FMT_USE_TYPE_TRAITS=1")
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