206 lines
8.6 KiB
CMake
206 lines
8.6 KiB
CMake
# - Find LLVM headers and libraries.
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# This module locates LLVM and adapts the llvm-config output for use with
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# CMake.
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#
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# A given list of COMPONENTS is passed to llvm-config.
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#
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# The following variables are defined:
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# LLVM_FOUND - true if LLVM was found
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# LLVM_CXXFLAGS - C++ compiler flags for files that include LLVM headers.
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# LLVM_HOST_TARGET - Target triple used to configure LLVM.
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# LLVM_INCLUDE_DIRS - Directory containing LLVM include files.
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# LLVM_LDFLAGS - Linker flags to add when linking against LLVM
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# (includes -LLLVM_LIBRARY_DIRS).
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# LLVM_LIBRARIES - Full paths to the library files to link against.
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# LLVM_LIBRARY_DIRS - Directory containing LLVM libraries.
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# LLVM_ROOT_DIR - The root directory of the LLVM installation.
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# llvm-config is searched for in ${LLVM_ROOT_DIR}/bin.
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# LLVM_VERSION_MAJOR - Major version of LLVM.
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# LLVM_VERSION_MINOR - Minor version of LLVM.
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# LLVM_VERSION_STRING - Full LLVM version string (e.g. 2.9).
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#
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# Note: The variable names were chosen in conformance with the offical CMake
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# guidelines, see ${CMAKE_ROOT}/Modules/readme.txt.
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# Try suffixed versions to pick up the newest LLVM install available on Debian
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# derivatives.
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# We also want an user-specified LLVM_ROOT_DIR to take precedence over the
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# system default locations such as /usr/local/bin. Executing find_program()
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# multiples times is the approach recommended in the docs.
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set(llvm_config_names llvm-config-3.6 llvm-config36
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llvm-config-3.5 llvm-config35
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llvm-config-3.4 llvm-config34
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llvm-config-3.3 llvm-config33
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llvm-config-3.2 llvm-config32
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llvm-config-3.1 llvm-config31 llvm-config
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)
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find_program(LLVM_CONFIG
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NAMES ${llvm_config_names}
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PATHS ${LLVM_ROOT_DIR}/bin NO_DEFAULT_PATH
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DOC "Path to llvm-config tool.")
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IF(APPLE)
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set(llvm_config_paths
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/sw/bin
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/opt/local/bin
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/opt/bin
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/usr/local/opt/llvm/bin #brew
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NO_DEFAULT_PATH
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)
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# mac oriented: avoid the default llvm (x-code)
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find_program(LLVM_CONFIG
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NAMES ${llvm_config_names}
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PATHS ${llvm_config_paths} NO_DEFAULT_PATH
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DOC "Path to llvm-config tool.")
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ENDIF(APPLE)
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find_program(LLVM_CONFIG NAMES ${llvm_config_names})
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if ((WIN32 AND NOT(MINGW OR CYGWIN)) OR NOT LLVM_CONFIG)
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if (WIN32)
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# A bit of a sanity check:
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if( NOT EXISTS ${LLVM_ROOT_DIR}/include/llvm )
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message(SYSTEM_ERROR_FATAL "LLVM_ROOT_DIR (${LLVM_ROOT_DIR}) is not a valid LLVM install")
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endif()
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# We incorporate the CMake features provided by LLVM:
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set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${LLVM_ROOT_DIR}/share/llvm/cmake")
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include(LLVMConfig)
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# Set properties
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set(LLVM_HOST_TARGET ${TARGET_TRIPLE})
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set(LLVM_VERSION_STRING ${LLVM_PACKAGE_VERSION})
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set(LLVM_CXXFLAGS ${LLVM_DEFINITIONS})
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set(LLVM_LDFLAGS "")
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "all-targets" index)
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list(APPEND LLVM_FIND_COMPONENTS ${LLVM_TARGETS_TO_BUILD})
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# Work around LLVM bug 21016
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list(FIND LLVM_TARGETS_TO_BUILD "X86" TARGET_X86)
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if(TARGET_X86 GREATER -1)
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list(APPEND LLVM_FIND_COMPONENTS x86utils)
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endif()
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# Similar to the work around above, but for AArch64
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list(FIND LLVM_TARGETS_TO_BUILD "AArch64" TARGET_AArch64)
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if(TARGET_AArch64 GREATER -1)
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list(APPEND LLVM_FIND_COMPONENTS AArch64Utils)
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endif()
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "backend" index)
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if(${LLVM_VERSION_STRING} MATCHES "^3\\.[0-2][\\.0-9A-Za-z]*")
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# Versions below 3.3 do not support components objcarcopts, option
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "objcarcopts" index)
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "option" index)
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endif()
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if(${LLVM_VERSION_STRING} MATCHES "^3\\.[0-4][\\.0-9A-Za-z]*")
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# Versions below 3.5 do not support components lto, profiledata
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "lto" index)
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "profiledata" index)
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endif()
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if(${LLVM_VERSION_STRING} MATCHES "^3\\.[0-4][\\.0-9A-Za-z]*")
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llvm_map_components_to_libraries(tmplibs ${LLVM_FIND_COMPONENTS})
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else()
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llvm_map_components_to_libnames(tmplibs ${LLVM_FIND_COMPONENTS})
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endif()
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if(MSVC)
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foreach(lib ${tmplibs})
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list(APPEND LLVM_LIBRARIES "${LLVM_LIBRARY_DIRS}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib}${CMAKE_STATIC_LIBRARY_SUFFIX}")
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endforeach()
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else()
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# Rely on the library search path being set correctly via -L on
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# MinGW and others, as the library list returned by
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# llvm_map_components_to_libraries also includes imagehlp and psapi.
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set(LLVM_LDFLAGS "-L${LLVM_LIBRARY_DIRS}")
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set(LLVM_LIBRARIES ${tmplibs})
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endif()
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# When using the CMake LLVM module, LLVM_DEFINITIONS is a list
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# instead of a string. Later, the list seperators would entirely
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# disappear, replace them by spaces instead. A better fix would be
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# to switch to add_definitions() instead of throwing strings around.
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string(REPLACE ";" " " LLVM_CXXFLAGS "${LLVM_CXXFLAGS}")
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else()
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if (NOT FIND_LLVM_QUIETLY)
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message(WARNING "Could not find llvm-config. Try manually setting LLVM_CONFIG to the llvm-config executable of the installation to use.")
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endif()
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endif()
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else()
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macro(llvm_set var flag)
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if(LLVM_FIND_QUIETLY)
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set(_quiet_arg ERROR_QUIET)
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endif()
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execute_process(
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COMMAND ${LLVM_CONFIG} --${flag}
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OUTPUT_VARIABLE LLVM_${var}
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OUTPUT_STRIP_TRAILING_WHITESPACE
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${_quiet_arg}
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)
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if(${ARGV2})
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file(TO_CMAKE_PATH "${LLVM_${var}}" LLVM_${var})
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endif()
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endmacro()
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macro(llvm_set_libs var flag prefix)
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if(LLVM_FIND_QUIETLY)
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set(_quiet_arg ERROR_QUIET)
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endif()
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execute_process(
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COMMAND ${LLVM_CONFIG} --${flag} ${LLVM_FIND_COMPONENTS}
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OUTPUT_VARIABLE tmplibs
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OUTPUT_STRIP_TRAILING_WHITESPACE
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${_quiet_arg}
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)
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file(TO_CMAKE_PATH "${tmplibs}" tmplibs)
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string(REGEX REPLACE "([$^.[|*+?()]|])" "\\\\\\1" pattern "${prefix}/")
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string(REGEX MATCHALL "${pattern}[^ ]+" LLVM_${var} ${tmplibs})
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endmacro()
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llvm_set(VERSION_STRING version)
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llvm_set(CXXFLAGS cxxflags)
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llvm_set(HOST_TARGET host-target)
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llvm_set(INCLUDE_DIRS includedir true)
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llvm_set(ROOT_DIR prefix true)
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if(${LLVM_VERSION_STRING} MATCHES "^3\\.[0-2][\\.0-9A-Za-z]*")
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# Versions below 3.3 do not support components objcarcopts, option
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "objcarcopts" index)
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "option" index)
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endif()
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if(${LLVM_VERSION_STRING} MATCHES "^3\\.[0-4][\\.0-9A-Za-z]*")
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# Versions below 3.5 do not support components lto, profiledata
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "lto" index)
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "profiledata" index)
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endif()
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llvm_set(LDFLAGS ldflags)
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if(NOT ${LLVM_VERSION_STRING} MATCHES "^3\\.[0-4][\\.0-9A-Za-z]*")
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# In LLVM 3.5+, the system library dependencies (e.g. "-lz") are accessed
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# using the separate "--system-libs" flag.
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llvm_set(SYSTEM_LIBS system-libs)
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string(REPLACE "\n" " " LLVM_LDFLAGS "${LLVM_LDFLAGS} ${LLVM_SYSTEM_LIBS}")
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endif()
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llvm_set(LIBRARY_DIRS CMAKE_INSTALL_LIBDIR true)
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llvm_set_libs(LIBRARIES libfiles "${LLVM_LIBRARY_DIRS}")
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endif()
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# On CMake builds of LLVM, the output of llvm-config --cxxflags does not
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# include -fno-rtti, leading to linker errors. Be sure to add it.
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if(CMAKE_COMPILER_IS_GNUCXX OR (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang"))
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if(NOT ${LLVM_CXXFLAGS} MATCHES "-fno-rtti")
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set(LLVM_CXXFLAGS "${LLVM_CXXFLAGS} -fno-rtti")
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endif()
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endif()
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string(REGEX REPLACE "([0-9]+).*" "\\1" LLVM_VERSION_MAJOR "${LLVM_VERSION_STRING}" )
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string(REGEX REPLACE "[0-9]+\\.([0-9]+).*[A-Za-z]*" "\\1" LLVM_VERSION_MINOR "${LLVM_VERSION_STRING}" )
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# Use the default CMake facilities for handling QUIET/REQUIRED.
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include(FindPackageHandleStandardArgs)
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if(${CMAKE_VERSION} VERSION_LESS "2.8.4")
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# The VERSION_VAR argument is not supported on pre-2.8.4, work around this.
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set(VERSION_VAR dummy)
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endif()
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find_package_handle_standard_args(LLVM
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REQUIRED_VARS LLVM_ROOT_DIR LLVM_HOST_TARGET
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VERSION_VAR LLVM_VERSION_STRING)
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