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105 lines
3.7 KiB
CMake
105 lines
3.7 KiB
CMake
# Downloads and extracts the LLVM archive for the current system from
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# https://releases.llvm.org
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#
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# Returns the extracted LLVM archive directory in DOWNLOADED_CLANG_DIR
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#
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# Downloads 7-Zip to extract LLVM if it isn't available in the PATH
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function(download_and_extract_llvm CLANG_VERSION)
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include(DownloadAndExtract7zip)
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set(CLANG_ARCHIVE_EXT .tar.xz)
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if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
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set(CLANG_ARCHIVE_NAME
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clang+llvm-${CLANG_VERSION}-x86_64-linux-gnu-ubuntu-14.04)
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elseif(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
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set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin)
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elseif(${CMAKE_SYSTEM_NAME} STREQUAL Windows)
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set(CLANG_ARCHIVE_NAME LLVM-${CLANG_VERSION}-win64)
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set(CLANG_ARCHIVE_EXT .exe)
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elseif(${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
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# 6.0.0 uses freebsd-10 while 5.0.1 uses freebsd10
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set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-amd64-unknown-freebsd-10)
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endif()
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set(CLANG_ARCHIVE_FULL_NAME ${CLANG_ARCHIVE_NAME}${CLANG_ARCHIVE_EXT})
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set(CLANG_ARCHIVE_FILE ${CMAKE_BINARY_DIR}/${CLANG_ARCHIVE_FULL_NAME})
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set(CLANG_ARCHIVE_EXTRACT_DIR ${CMAKE_BINARY_DIR}/${CLANG_ARCHIVE_NAME})
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set(CLANG_ARCHIVE_URL
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https://releases.llvm.org/${CLANG_VERSION}/${CLANG_ARCHIVE_FULL_NAME})
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if(NOT EXISTS ${CLANG_ARCHIVE_FILE})
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message(STATUS "Downloading LLVM ${CLANG_VERSION} (${CLANG_ARCHIVE_URL}) ...")
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file(DOWNLOAD ${CLANG_ARCHIVE_URL} ${CLANG_ARCHIVE_FILE})
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endif()
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if(NOT EXISTS ${CLANG_ARCHIVE_EXTRACT_DIR})
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if(${CLANG_ARCHIVE_EXT} STREQUAL .exe)
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find_program(7ZIP_EXECUTABLE 7z)
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if(NOT 7ZIP_EXECUTABLE)
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message(STATUS "7-Zip not found in PATH")
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download_and_extract_7zip()
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find_program(7ZIP_EXECUTABLE 7z NO_DEFAULT_PATH
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PATHS ${DOWNLOADED_7ZIP_DIR})
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else()
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message(STATUS "7-Zip found in PATH")
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endif()
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message(STATUS "Extracting downloaded LLVM with 7-Zip ...")
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# Avoid running the LLVM installer by extracting the exe with 7-Zip
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execute_process(COMMAND ${7ZIP_EXECUTABLE} x
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-o${CLANG_ARCHIVE_EXTRACT_DIR}
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-xr!$PLUGINSDIR ${CLANG_ARCHIVE_FILE}
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OUTPUT_QUIET)
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elseif(${CLANG_ARCHIVE_EXT} STREQUAL .tar.xz)
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message(STATUS "Extracting downloaded LLVM with CMake built-in tar ...")
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# CMake has builtin support for tar via the -E flag
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execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xf ${CLANG_ARCHIVE_FILE}
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OUTPUT_QUIET)
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endif()
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# There is a null pointer dereference issue in
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# tools/libclang/CXIndexDataConsumer.cpp handleReference.
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# https://github.com/cquery-project/cquery/issues/219
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if(${CMAKE_SYSTEM_NAME} STREQUAL Linux AND
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${CLANG_VERSION} MATCHES 4.0.0|5.0.1)
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message(STATUS "Patching downloaded LLVM (see \
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https://github.com/cquery-project/cquery/issues/219)")
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if(${CLANG_VERSION} STREQUAL 4.0.0)
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# 4289205 = $[0x4172b5] (we use decimals for seek since execute_process
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# does not evaluate $[] bash syntax)
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execute_process(COMMAND printf \\x4d
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COMMAND dd
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of=${CLANG_ARCHIVE_EXTRACT_DIR}/lib/libclang.so.4.0
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obs=1 seek=4289205 conv=notrunc
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OUTPUT_QUIET)
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elseif(${CLANG_VERSION} STREQUAL 5.0.1)
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# 4697806 = $[0x47aece]
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execute_process(COMMAND printf \\x4d
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COMMAND dd
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of=${CLANG_ARCHIVE_EXTRACT_DIR}/lib/libclang.so.5.0
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obs=1 seek=4697806 conv=notrunc
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OUTPUT_QUIET)
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endif()
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endif()
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endif()
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# CMake functions have no return values so we just lift our return variable to
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# the parent scope
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set(DOWNLOADED_CLANG_DIR ${CLANG_ARCHIVE_EXTRACT_DIR} PARENT_SCOPE)
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endfunction()
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