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83338c4957
Updated minimum cmake version to 3.1 Added checks in findllvm script to handle old 3.4 LLVM version Added back include directories needed by old LLVM version in ICG.
202 lines
8.6 KiB
CMake
202 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_NATIVE_ARCH - Backend corresponding to LLVM_HOST_TARGET, e.g.,
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# X86 for x86_64 and i686 hosts.
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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. 6.0.0svn).
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# LLVM_VERSION_BASE_STRING - Base LLVM version string without git/svn suffix (e.g. 6.0.0).
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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-9.0 llvm-config90
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llvm-config-8.0 llvm-config80
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llvm-config-7.0 llvm-config70
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llvm-config-6.0 llvm-config60
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llvm-config-5.0 llvm-config50
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llvm-config-4.0 llvm-config40
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llvm-config-3.9 llvm-config39
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llvm-config)
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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 /usr/local/opt/llvm/bin NO_DEFAULT_PATH
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DOC "Path to llvm-config tool.")
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find_program(LLVM_CONFIG NAMES ${llvm_config_names})
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# Prints a warning/failure message depending on the required/quiet flags. Copied
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# from FindPackageHandleStandardArgs.cmake because it doesn't seem to be exposed.
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macro(_LLVM_FAIL _msg)
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if(LLVM_FIND_REQUIRED)
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message(FATAL_ERROR "${_msg}")
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else()
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if(NOT LLVM_FIND_QUIETLY)
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message(STATUS "${_msg}")
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endif()
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endif()
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endmacro()
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if(NOT LLVM_CONFIG)
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if(NOT LLVM_FIND_QUIETLY)
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message(WARNING "Could not find llvm-config (LLVM >= ${LLVM_FIND_VERSION}). Try manually setting LLVM_CONFIG to the llvm-config executable of the installation to use.")
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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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set(result_code)
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execute_process(
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COMMAND ${LLVM_CONFIG} --${flag}
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RESULT_VARIABLE result_code
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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(result_code)
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_LLVM_FAIL("Failed to execute llvm-config ('${LLVM_CONFIG}', result code: '${result_code})'")
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else()
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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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endif()
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endmacro()
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macro(llvm_set_libs var flag components)
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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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set(result_code)
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execute_process(
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COMMAND ${LLVM_CONFIG} --${flag} ${components}
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RESULT_VARIABLE result_code
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OUTPUT_VARIABLE tmplibs
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OUTPUT_STRIP_TRAILING_WHITESPACE
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${_quiet_arg}
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)
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if(result_code)
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_LLVM_FAIL("Failed to execute llvm-config ('${LLVM_CONFIG}', result code: '${result_code})'")
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else()
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file(TO_CMAKE_PATH "${tmplibs}" tmplibs)
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string(REGEX MATCHALL "${pattern}[^ ]+" LLVM_${var} ${tmplibs})
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endif()
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endmacro()
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llvm_set(VERSION_STRING version)
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llvm_set(CXXFLAGS cxxflags)
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llvm_set(HOST_TARGET host-target)
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llvm_set(INCLUDE_DIRS includedir true)
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llvm_set(ROOT_DIR prefix true)
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# The LLVM version string _may_ contain a git/svn suffix, so match only the x.y.z part
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string(REGEX MATCH "^[0-9]+[.][0-9]+[.][0-9]+" LLVM_VERSION_BASE_STRING "${LLVM_VERSION_STRING}")
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if(NOT ${LLVM_VERSION_STRING} MATCHES "^3\\.4\\..*")
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llvm_set(ENABLE_ASSERTIONS assertion-mode)
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endif()
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# Versions below 4.0 do not support components debuginfomsf and demangle
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if(${LLVM_VERSION_STRING} MATCHES "^3\\..*")
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "debuginfomsf" index)
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "demangle" index)
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endif()
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# Versions below 6.0 do not support component windowsmanifest
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if(${LLVM_VERSION_STRING} MATCHES "^[3-5]\\..*")
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list(REMOVE_ITEM LLVM_FIND_COMPONENTS "windowsmanifest" index)
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endif()
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llvm_set(LDFLAGS ldflags)
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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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if(NOT ${LLVM_VERSION_STRING} MATCHES "^3\\.4\\..*")
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llvm_set(SYSTEM_LIBS system-libs)
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endif()
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string(REPLACE "\n" " " LLVM_LDFLAGS "${LLVM_LDFLAGS} ${LLVM_SYSTEM_LIBS}")
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string(STRIP ${LLVM_LDFLAGS} LLVM_LDFLAGS)
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llvm_set(LIBRARY_DIRS libdir true)
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llvm_set_libs(LIBRARIES libs "${LLVM_FIND_COMPONENTS}")
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# LLVM bug: llvm-config --libs tablegen returns -lLLVM-3.8.0
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# but code for it is not in shared library
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if("${LLVM_FIND_COMPONENTS}" MATCHES "tablegen")
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if (NOT "${LLVM_LIBRARIES}" MATCHES "LLVMTableGen")
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set(LLVM_LIBRARIES "${LLVM_LIBRARIES};-lLLVMTableGen")
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endif()
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endif()
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# Versions below 4.0 do not support llvm-config --cmakedir
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if(${LLVM_VERSION_STRING} MATCHES "^3\\..*")
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set(LLVM_CMAKEDIR ${LLVM_LIBRARY_DIRS}/cmake/llvm)
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else()
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llvm_set(CMAKEDIR cmakedir)
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endif()
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llvm_set(TARGETS_TO_BUILD targets-built)
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string(REGEX MATCHALL "${pattern}[^ ]+" LLVM_TARGETS_TO_BUILD ${LLVM_TARGETS_TO_BUILD})
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# Parse LLVM_NATIVE_ARCH manually from LLVMConfig.cmake; including it leads to issues like
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# https://github.com/ldc-developers/ldc/issues/3079.
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if(EXISTS "${LLVM_CMAKEDIR}/LLVMConfig.cmake")
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file(STRINGS "${LLVM_CMAKEDIR}/LLVMConfig.cmake" LLVM_NATIVE_ARCH LIMIT_COUNT 1 REGEX "^set\\(LLVM_NATIVE_ARCH (.+)\\)$")
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string(REGEX MATCH "set\\(LLVM_NATIVE_ARCH (.+)\\)" LLVM_NATIVE_ARCH "${LLVM_NATIVE_ARCH}")
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set(LLVM_NATIVE_ARCH ${CMAKE_MATCH_1})
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message(STATUS "LLVM_NATIVE_ARCH: ${LLVM_NATIVE_ARCH}")
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endif()
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endif()
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# On CMake builds of LLVM, the output of llvm-config --cxxflags does not
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# include -fno-rtti, leading to linker errors. Be sure to add it.
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if(NOT MSVC AND (CMAKE_COMPILER_IS_GNUCXX OR (${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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# Remove some clang-specific flags for gcc.
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if(CMAKE_COMPILER_IS_GNUCXX)
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string(REPLACE "-Wcovered-switch-default " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
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string(REPLACE "-Wstring-conversion " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
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string(REPLACE "-fcolor-diagnostics " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
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# this requires more recent gcc versions (not supported by 4.9)
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string(REPLACE "-Werror=unguarded-availability-new " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
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endif()
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# Remove gcc-specific flags for clang.
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if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
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string(REPLACE "-Wno-maybe-uninitialized " "" LLVM_CXXFLAGS ${LLVM_CXXFLAGS})
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endif()
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string(REGEX REPLACE "([0-9]+).*" "\\1" LLVM_VERSION_MAJOR "${LLVM_VERSION_STRING}" )
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string(REGEX REPLACE "[0-9]+\\.([0-9]+).*[A-Za-z]*" "\\1" LLVM_VERSION_MINOR "${LLVM_VERSION_STRING}" )
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string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+).*[A-Za-z]*" "\\1" LLVM_VERSION_PATCH "${LLVM_VERSION_STRING}" )
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if (${LLVM_VERSION_STRING} VERSION_LESS ${LLVM_FIND_VERSION})
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message(FATAL_ERROR "Unsupported LLVM version found ${LLVM_VERSION_STRING}. At least version ${LLVM_FIND_VERSION} is required.")
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endif()
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# Use the default CMake facilities for handling QUIET/REQUIRED.
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include(FindPackageHandleStandardArgs)
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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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