diff options
Diffstat (limited to 'cmake/Toolset.cmake')
| -rw-r--r-- | cmake/Toolset.cmake | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/cmake/Toolset.cmake b/cmake/Toolset.cmake index ae5a8d020..fc019cf35 100644 --- a/cmake/Toolset.cmake +++ b/cmake/Toolset.cmake @@ -10,6 +10,8 @@ elseif(CMAKE_C_COMPILER_ID MATCHES "Clang|AppleClang") SET (COMPILER_CLANG 1) endif() +set(CMAKE_POSITION_INDEPENDENT_CODE ON) + SET (COMPILER_FAST_MATH "") if (ENABLE_FAST_MATH MATCHES "ON") # We need to keep nans and infinities, so cannot keep all fast math there @@ -41,10 +43,29 @@ elseif (COMPILER_CLANG) if (CMAKE_C_COMPILER_VERSION VERSION_LESS ${CLANG_MINIMUM_VERSION}) message (FATAL_ERROR "Clang version must be at least ${CLANG_MINIMUM_VERSION}.") endif () - ADD_COMPILE_OPTIONS(-Wno-unused-command-line-argument) + # Hack to fix try_compile + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-command-line-argument") + SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-command-line-argument") + SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-ignored-optimization-argument") + SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-ignored-optimization-argument") + if (ENABLE_LIBCXX MATCHES "AUTO") + include(CheckCXXSourceCompiles) + set(OLD_CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++") + check_cxx_source_compiles(" +#include <version> +int main() { return 0; } + " HAVE_LIBCXX ) + if (HAVE_LIBCXX) + SET(ENABLE_LIBCXX "ON") + else() + SET(ENABLE_LIBCXX "OFF") + endif() + set(CMAKE_CXX_FLAGS "${OLD_CMAKE_CXX_FLAGS}") + endif() if (ENABLE_LIBCXX MATCHES "ON") - # Use libc++ as libstdc++ is buggy in many cases set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++") + set(CLANG_DEFAULT_CXX_STDLIB "libc++") endif () else () message (WARNING "You are using an unsupported compiler ${CMAKE_C_COMPILER_ID}. Compilation has only been tested with Clang 4+ and GCC 4+.") |