5f3d5be3dd
Since libc++abi is built with -nodefaultlibs, we should be using this option even for CMake checks to avoid any inconsistency and also to avoid dependency on a working C++ standard library just for the setting up the build itself. The implementation is largely similar to the one used by libc++. Differential Revision: https://reviews.llvm.org/D31639 llvm-svn: 299797
59 lines
2.2 KiB
CMake
59 lines
2.2 KiB
CMake
function(find_compiler_rt_library name dest)
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if (NOT DEFINED LIBCXXABI_COMPILE_FLAGS)
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message(FATAL_ERROR "LIBCXXABI_COMPILE_FLAGS must be defined when using this function")
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endif()
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set(dest "" PARENT_SCOPE)
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set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${TARGET_TRIPLE} ${LIBCXXABI_COMPILE_FLAGS}
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"--rtlib=compiler-rt" "--print-libgcc-file-name")
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if (CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_TARGET)
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list(APPEND CLANG_COMMAND "--target=${CMAKE_CXX_COMPILER_TARGET}")
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endif()
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execute_process(
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COMMAND ${CLANG_COMMAND}
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RESULT_VARIABLE HAD_ERROR
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OUTPUT_VARIABLE LIBRARY_FILE
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)
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string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
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string(REPLACE "builtins" "${name}" LIBRARY_FILE "${LIBRARY_FILE}")
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if (NOT HAD_ERROR AND EXISTS "${LIBRARY_FILE}")
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message(STATUS "Found compiler-rt library: ${LIBRARY_FILE}")
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set(${dest} "${LIBRARY_FILE}" PARENT_SCOPE)
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else()
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message(STATUS "Failed to find compiler-rt library")
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endif()
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endfunction()
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function(find_compiler_rt_dir dest)
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if (NOT DEFINED LIBCXXABI_COMPILE_FLAGS)
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message(FATAL_ERROR "LIBCXXABI_COMPILE_FLAGS must be defined when using this function")
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endif()
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set(dest "" PARENT_SCOPE)
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if (APPLE)
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set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXXABI_COMPILE_FLAGS}
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"-print-file-name=lib")
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execute_process(
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COMMAND ${CLANG_COMMAND}
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RESULT_VARIABLE HAD_ERROR
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OUTPUT_VARIABLE LIBRARY_DIR
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)
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string(STRIP "${LIBRARY_DIR}" LIBRARY_DIR)
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set(LIBRARY_DIR "${LIBRARY_DIR}/darwin")
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else()
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set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXXABI_COMPILE_FLAGS}
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"--rtlib=compiler-rt" "--print-libgcc-file-name")
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execute_process(
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COMMAND ${CLANG_COMMAND}
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RESULT_VARIABLE HAD_ERROR
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OUTPUT_VARIABLE LIBRARY_FILE
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)
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string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
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get_filename_component(LIBRARY_DIR "${LIBRARY_FILE}" DIRECTORY)
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endif()
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if (NOT HAD_ERROR AND EXISTS "${LIBRARY_DIR}")
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message(STATUS "Found compiler-rt directory: ${LIBRARY_DIR}")
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set(${dest} "${LIBRARY_DIR}" PARENT_SCOPE)
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else()
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message(STATUS "Failed to find compiler-rt directory")
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endif()
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endfunction()
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