Home | History | Annotate | Download | only in modules 
      1 # This CMake module is responsible for setting the standard library to libc++
      2 # if the user has requested it.
      3 
      4 include(DetermineGCCCompatible)
      5 
      6 if(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   include(CheckLinkerFlag)
     17   if(LLVM_ENABLE_LIBCXX)
     18     if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
     19       check_cxx_compiler_flag("-stdlib=libc++" CXX_COMPILER_SUPPORTS_STDLIB)
     20       check_linker_flag("-stdlib=libc++" CXX_LINKER_SUPPORTS_STDLIB)
     21       if(CXX_COMPILER_SUPPORTS_STDLIB AND CXX_LINKER_SUPPORTS_STDLIB)
     22         append("-stdlib=libc++"
     23           CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
     24           CMAKE_MODULE_LINKER_FLAGS)
     25       else()
     26         message(WARNING "Can't specify libc++ with '-stdlib='")
     27       endif()
     28     else()
     29       message(WARNING "Not sure how to specify libc++ for this compiler")
     30     endif()
     31   endif()
     32 endif()
     33