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1# This CMake module is responsible for setting the standard library to libc++
2# if the user has requested it.
3
4include(DetermineGCCCompatible)
5
6if(NOT DEFINED LLVM_STDLIB_HANDLED)
7  set(LLVM_STDLIB_HANDLED ON)
8
9  function(append value)
10    foreach(variable ${ARGN})
11      set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
12    endforeach(variable)
13  endfunction()
14
15  include(CheckCXXCompilerFlag)
16  if(LLVM_ENABLE_LIBCXX)
17    if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
18      check_cxx_compiler_flag("-stdlib=libc++" CXX_SUPPORTS_STDLIB)
19      if(CXX_SUPPORTS_STDLIB)
20        append("-stdlib=libc++"
21          CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
22          CMAKE_MODULE_LINKER_FLAGS)
23        if(LLVM_ENABLE_LIBCXXABI)
24          append("-lc++abi"
25            CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
26            CMAKE_MODULE_LINKER_FLAGS)
27        endif()
28      else()
29        message(WARNING "Can't specify libc++ with '-stdlib='")
30      endif()
31    else()
32      message(WARNING "Not sure how to specify libc++ for this compiler")
33    endif()
34  endif()
35endif()
36