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Linux: Fix detection of C library functions by CMake

floating-point
Armin Burgmeier 2010-09-04 12:48:17 +02:00
parent 1bed2ca964
commit 2547d44baf
1 changed files with 6 additions and 0 deletions
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6
CMakeLists.txt
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@ -69,6 +69,11 @@ include(CheckCXXSourceCompiles)
foreach(FLAG ${OC_CXX_FLAGS})
set(OC_REQUIRED_FLAGS "${OC_REQUIRED_FLAGS} ${FLAG}")
endforeach()
# ck 10-09-04: Reset CMAKE_REQUIRED_FLAGS after having done the C++0x checks
# otherwise they are used for C library checks as well and the C compiler bails
# out because it does not understand -std=gnu++0x
set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS ${OC_REQUIRED_FLAGS})
CHECK_CXX_SOURCE_COMPILES("void f(struct D&&); int main() { return 0; }" HAVE_RVALUE_REF)
CHECK_CXX_SOURCE_COMPILES("int main() { void *d = nullptr; }" HAVE_NULLPTR)
@ -76,6 +81,7 @@ if(HAVE_NULLPTR)
CHECK_CXX_SOURCE_COMPILES("#include <cstddef>
template<class T> void f(T &&); template<> void f(std::nullptr_t &&) {} int main() { f(NULL); }" NULL_IS_NULLPTR_T)
endif()
set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
if(MSVC_VERSION GREATER 1499)
# Activate minimal rebuild