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Detect broken cmath

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This commit is contained in:
vitaut 2015-03-19 07:34:50 -07:00
parent 0e8fcd47a0
commit f49ab8e4a9
1 changed files with 11 additions and 1 deletions
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10
CMakeLists.txt
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@ -21,7 +21,17 @@ 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)
if (FMT_CPP11_CMATH)
set(CPP11_FLAG -std=c++11)
else ()
set(CMAKE_REQUIRED_FLAGS "")
endif ()
else ()
check_cxx_compiler_flag(-std=c++0x HAVE_STD_CPP0X_FLAG)
if (HAVE_STD_CPP0X_FLAG)