derek.holloway
7502bf64a4
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55 lines
1.8 KiB
CMake
55 lines
1.8 KiB
CMake
# This CMake module is responsible for setting the standard library to libc++
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# if the user has requested it.
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include(DetermineGCCCompatible)
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if(NOT DEFINED LLVM_STDLIB_HANDLED)
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set(LLVM_STDLIB_HANDLED ON)
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function(append value)
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foreach(variable ${ARGN})
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set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
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endforeach(variable)
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endfunction()
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include(CheckCXXCompilerFlag)
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include(CheckLinkerFlag)
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set(LLVM_LIBCXX_USED 0)
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if(LLVM_ENABLE_LIBCXX)
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if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
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check_cxx_compiler_flag("-stdlib=libc++" CXX_COMPILER_SUPPORTS_STDLIB)
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check_linker_flag(CXX "-stdlib=libc++" CXX_LINKER_SUPPORTS_STDLIB)
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if(CXX_COMPILER_SUPPORTS_STDLIB AND CXX_LINKER_SUPPORTS_STDLIB)
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append("-stdlib=libc++"
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CMAKE_CXX_FLAGS CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
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CMAKE_MODULE_LINKER_FLAGS)
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set(LLVM_LIBCXX_USED 1)
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else()
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message(WARNING "Can't specify libc++ with '-stdlib='")
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endif()
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else()
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message(WARNING "Not sure how to specify libc++ for this compiler")
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endif()
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endif()
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if(LLVM_STATIC_LINK_CXX_STDLIB)
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if(LLVM_COMPILER_IS_GCC_COMPATIBLE)
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check_cxx_compiler_flag("-static-libstdc++"
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CXX_COMPILER_SUPPORTS_STATIC_STDLIB)
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check_linker_flag(CXX "-static-libstdc++" CXX_LINKER_SUPPORTS_STATIC_STDLIB)
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if(CXX_COMPILER_SUPPORTS_STATIC_STDLIB AND
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CXX_LINKER_SUPPORTS_STATIC_STDLIB)
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append("-static-libstdc++"
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CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS
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CMAKE_MODULE_LINKER_FLAGS)
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else()
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message(WARNING
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"Can't specify static linking for the C++ standard library")
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endif()
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else()
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message(WARNING "Not sure how to specify static linking of C++ standard "
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"library for this compiler")
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endif()
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endif()
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endif()
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