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outlined the compiler feature tests to improve script readability

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This commit is contained in:
Mario Werner 2016-01-29 13:03:47 +01:00
parent 3019a8c1fd
commit 0fb474be3a
3 changed files with 64 additions and 52 deletions
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31
CMakeLists.txt
View File

@ -23,39 +23,12 @@ message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag(-std=c++11 HAVE_STD_CPP11_FLAG)
if (HAVE_STD_CPP11_FLAG)
# Check if including cmath works with -std=c++11 and -O3.
# It may not in MinGW due to bug http://ehc.ac/p/mingw/bugs/2250/.
set(CMAKE_REQUIRED_FLAGS "-std=c++11 -O3")
check_cxx_source_compiles("
#include <cmath>
int main() {}" FMT_CPP11_CMATH)
# Check if including <unistd.h> works with -std=c++11.
# It may not in MinGW due to bug http://sourceforge.net/p/mingw/bugs/2024/.
check_cxx_source_compiles("
#include <unistd.h>
int main() {}" FMT_CPP11_UNISTD_H)
if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
set(CPP11_FLAG -std=c++11)
else ()
check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)
if (HAVE_STD_CPP11_FLAG)
set(CPP11_FLAG -std=gnu++11)
endif ()
endif ()
set(CMAKE_REQUIRED_FLAGS )
else ()
check_cxx_compiler_flag(-std=c++0x HAVE_STD_CPP0X_FLAG)
if (HAVE_STD_CPP0X_FLAG)
set(CPP11_FLAG -std=c++0x)
endif ()
endif ()
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
"${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
include(testCxx11)
if (CMAKE_GENERATOR MATCHES "Visual Studio")
# If Microsoft SDK is installed create script run-msbuild.bat that
# calls SetEnv.cmd to to set up build environment and runs msbuild.

58
support/cmake/testCxx11.cmake Normal file
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@ -0,0 +1,58 @@
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag(-std=c++11 HAVE_STD_CPP11_FLAG)
if (HAVE_STD_CPP11_FLAG)
# Check if including cmath works with -std=c++11 and -O3.
# It may not in MinGW due to bug http://ehc.ac/p/mingw/bugs/2250/.
set(CMAKE_REQUIRED_FLAGS "-std=c++11 -O3")
check_cxx_source_compiles("
#include <cmath>
int main() {}" FMT_CPP11_CMATH)
# Check if including <unistd.h> works with -std=c++11.
# It may not in MinGW due to bug http://sourceforge.net/p/mingw/bugs/2024/.
check_cxx_source_compiles("
#include <unistd.h>
int main() {}" FMT_CPP11_UNISTD_H)
if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
set(CPP11_FLAG -std=c++11)
else ()
check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)
if (HAVE_STD_CPP11_FLAG)
set(CPP11_FLAG -std=gnu++11)
endif ()
endif ()
set(CMAKE_REQUIRED_FLAGS )
else ()
check_cxx_compiler_flag(-std=c++0x HAVE_STD_CPP0X_FLAG)
if (HAVE_STD_CPP0X_FLAG)
set(CPP11_FLAG -std=c++0x)
endif ()
endif ()
set(CMAKE_REQUIRED_FLAGS ${CPP11_FLAG})
# Check if variadic templates are working and not affected by GCC bug 39653:
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39653
check_cxx_source_compiles("
template <class T, class ...Types>
struct S { typedef typename S<Types...>::type type; };
int main() {}" SUPPORTS_VARIADIC_TEMPLATES)
# Check if initializer lists are supported.
check_cxx_source_compiles("
#include <initializer_list>
int main() {}" SUPPORTS_INITIALIZER_LIST)
# Check if enum bases are available
check_cxx_source_compiles("
enum C : char {A};
int main() {}"
SUPPORTS_ENUM_BASE)
# Check if type traits are available
check_cxx_source_compiles("
#include <type_traits>
class C { void operator=(const C&); };
int main() { static_assert(!std::is_copy_assignable<C>::value, \"\"); }"
SUPPORTS_TYPE_TRAITS)
set(CMAKE_REQUIRED_FLAGS )

27
test/CMakeLists.txt
View File

@ -28,18 +28,8 @@ endif ()
# Check if variadic templates are working and not affected by GCC bug 39653:
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39653
check_cxx_source_compiles("
template <class T, class ...Types>
struct S { typedef typename S<Types...>::type type; };
int main() {}" FMT_VARIADIC_TEMPLATES)
# Check if initializer lists are supported.
check_cxx_source_compiles("
#include <initializer_list>
int main() {}" FMT_INITIALIZER_LIST)
if (NOT FMT_VARIADIC_TEMPLATES OR NOT FMT_INITIALIZER_LIST)
add_definitions(-DGTEST_LANG_CXX11=0)
if (NOT SUPPORTS_VARIADIC_TEMPLATES OR NOT SUPPORTS_INITIALIZER_LIST)
target_compile_definitions(gmock PUBLIC GTEST_LANG_CXX11=0)
endif ()
# Workaround a bug in implementation of variadic templates in MSVC11.
@ -91,11 +81,7 @@ if (CPP11_FLAG)
set_target_properties(util-test PROPERTIES COMPILE_FLAGS ${CPP11_FLAG})
endif ()
check_cxx_source_compiles("
enum C : char {A};
int main() {}"
HAVE_ENUM_BASE)
if (HAVE_ENUM_BASE)
if (SUPPORTS_ENUM_BASE)
set_target_properties(util-test
PROPERTIES COMPILE_DEFINITIONS "FMT_USE_ENUM_BASE=1")
endif ()
@ -104,12 +90,7 @@ foreach (src ${FMT_SOURCES})
set(FMT_TEST_SOURCES ${FMT_TEST_SOURCES} ../${src})
endforeach ()
check_cxx_source_compiles("
#include <type_traits>
class C { void operator=(const C&); };
int main() { static_assert(!std::is_copy_assignable<C>::value, \"\"); }"
HAVE_TYPE_TRAITS)
if (HAVE_TYPE_TRAITS)
if (SUPPORTS_TYPE_TRAITS)
foreach (target format-test util-test)
set_target_properties(${target}
PROPERTIES COMPILE_DEFINITIONS "FMT_USE_TYPE_TRAITS=1")