| # This CMake module is responsible for setting the standard library to libc++ |
| # if the user has requested it. |
| |
| include(DetermineGCCCompatible) |
| |
| if(NOT DEFINED LLVM_STDLIB_HANDLED) |
| set(LLVM_STDLIB_HANDLED ON) |
| |
| function(append value) |
| foreach(variable ${ARGN}) |
| set(${variable} "${${variable}} ${value}" PARENT_SCOPE) |
| endforeach(variable) |
| endfunction() |
| |
| include(CheckCXXCompilerFlag) |
| include(CheckLinkerFlag) |
| set(LLVM_LIBCXX_USED 0) |
| if(LLVM_ENABLE_LIBCXX) |
| if(LLVM_COMPILER_IS_GCC_COMPATIBLE) |
| check_cxx_compiler_flag("-stdlib=libc++" CXX_COMPILER_SUPPORTS_STDLIB) |
| check_linker_flag(CXX "-stdlib=libc++" CXX_LINKER_SUPPORTS_STDLIB) |
| if(CXX_COMPILER_SUPPORTS_STDLIB AND CXX_LINKER_SUPPORTS_STDLIB) |
| append("-stdlib=libc++" |
| CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS |
| CMAKE_MODULE_LINKER_FLAGS) |
| set(LLVM_LIBCXX_USED 1) |
| else() |
| message(WARNING "Can't specify libc++ with '-stdlib='") |
| endif() |
| else() |
| message(WARNING "Not sure how to specify libc++ for this compiler") |
| endif() |
| endif() |
| |
| if(LLVM_STATIC_LINK_CXX_STDLIB) |
| if(LLVM_COMPILER_IS_GCC_COMPATIBLE) |
| check_cxx_compiler_flag("-static-libstdc++" |
| CXX_COMPILER_SUPPORTS_STATIC_STDLIB) |
| check_linker_flag(CXX "-static-libstdc++" CXX_LINKER_SUPPORTS_STATIC_STDLIB) |
| if(CXX_COMPILER_SUPPORTS_STATIC_STDLIB AND |
| CXX_LINKER_SUPPORTS_STATIC_STDLIB) |
| append("-static-libstdc++" |
| CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS |
| CMAKE_MODULE_LINKER_FLAGS) |
| else() |
| message(WARNING |
| "Can't specify static linking for the C++ standard library") |
| endif() |
| else() |
| message(WARNING "Not sure how to specify static linking of C++ standard " |
| "library for this compiler") |
| endif() |
| endif() |
| endif() |
