mirror of
https://github.com/oven-sh/bun
synced 2026-02-10 10:58:56 +00:00
152 lines
4.2 KiB
CMake
152 lines
4.2 KiB
CMake
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set(DEFAULT_ENABLE_LLVM ON)
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# if target is bun-zig, set ENABLE_LLVM to OFF
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if(TARGET bun-zig)
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set(DEFAULT_ENABLE_LLVM OFF)
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endif()
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optionx(ENABLE_LLVM BOOL "If LLVM should be used for compilation" DEFAULT ${DEFAULT_ENABLE_LLVM})
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if(NOT ENABLE_LLVM)
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return()
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endif()
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set(DEFAULT_LLVM_VERSION "21.1.8")
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optionx(LLVM_VERSION STRING "The version of LLVM to use" DEFAULT ${DEFAULT_LLVM_VERSION})
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string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" USE_LLVM_VERSION ${LLVM_VERSION})
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if(USE_LLVM_VERSION)
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set(LLVM_VERSION_MAJOR ${CMAKE_MATCH_1})
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set(LLVM_VERSION_MINOR ${CMAKE_MATCH_2})
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set(LLVM_VERSION_PATCH ${CMAKE_MATCH_3})
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# Accept any LLVM version within the same major.minor range (e.g. Alpine 3.23 ships 21.1.2)
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set(LLVM_VERSION_RANGE ">=${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.0 <${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.99")
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endif()
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set(LLVM_PATHS)
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if(APPLE)
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execute_process(
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COMMAND brew --prefix
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OUTPUT_VARIABLE HOMEBREW_PREFIX
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_QUIET
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)
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if(NOT HOMEBREW_PREFIX)
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if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|ARM64|aarch64|AARCH64")
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set(HOMEBREW_PREFIX /opt/homebrew)
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else()
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set(HOMEBREW_PREFIX /usr/local)
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endif()
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endif()
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if(USE_LLVM_VERSION)
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list(APPEND LLVM_PATHS ${HOMEBREW_PREFIX}/opt/llvm@${LLVM_VERSION_MAJOR}/bin)
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endif()
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list(APPEND LLVM_PATHS ${HOMEBREW_PREFIX}/opt/llvm/bin)
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endif()
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if(WIN32)
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# Prefer standalone LLVM over VS-bundled (standalone supports cross-compilation)
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list(APPEND LLVM_PATHS "C:/Program Files/LLVM/bin")
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endif()
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if(UNIX)
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list(APPEND LLVM_PATHS /usr/lib/llvm/bin)
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if(USE_LLVM_VERSION)
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list(APPEND LLVM_PATHS
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/usr/lib/llvm-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}/bin
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/usr/lib/llvm-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}/bin
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/usr/lib/llvm-${LLVM_VERSION_MAJOR}/bin
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/usr/lib/llvm${LLVM_VERSION_MAJOR}/bin
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)
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endif()
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endif()
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macro(find_llvm_command variable command)
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set(commands ${command})
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if(USE_LLVM_VERSION)
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list(APPEND commands
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${command}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}
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${command}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}
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${command}-${LLVM_VERSION_MAJOR}
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)
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endif()
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find_command(
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VARIABLE ${variable}
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VERSION_VARIABLE LLVM_VERSION
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COMMAND ${commands}
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PATHS ${LLVM_PATHS}
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VERSION "${LLVM_VERSION_RANGE}"
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)
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list(APPEND CMAKE_ARGS -D${variable}=${${variable}})
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endmacro()
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macro(find_llvm_command_no_version variable command)
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set(commands ${command})
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if(USE_LLVM_VERSION)
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list(APPEND commands
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${command}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}
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${command}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}
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${command}-${LLVM_VERSION_MAJOR}
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)
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endif()
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find_command(
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VARIABLE ${variable}
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VERSION_VARIABLE LLVM_VERSION
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COMMAND ${commands}
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PATHS ${LLVM_PATHS}
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)
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list(APPEND CMAKE_ARGS -D${variable}=${${variable}})
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endmacro()
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if(WIN32)
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find_llvm_command(CMAKE_C_COMPILER clang-cl)
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find_llvm_command(CMAKE_CXX_COMPILER clang-cl)
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find_llvm_command_no_version(CMAKE_LINKER lld-link)
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find_llvm_command_no_version(CMAKE_AR llvm-lib)
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find_llvm_command_no_version(CMAKE_STRIP llvm-strip)
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else()
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find_llvm_command(CMAKE_C_COMPILER clang)
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find_llvm_command(CMAKE_CXX_COMPILER clang++)
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find_llvm_command(CMAKE_LINKER llvm-link)
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find_llvm_command(CMAKE_AR llvm-ar)
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if (LINUX)
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# On Linux, strip ends up being more useful for us.
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find_command(
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VARIABLE
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CMAKE_STRIP
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COMMAND
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strip
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REQUIRED
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ON
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)
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else()
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find_llvm_command(CMAKE_STRIP llvm-strip)
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endif()
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find_llvm_command(CMAKE_RANLIB llvm-ranlib)
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if(LINUX)
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find_llvm_command(LLD_PROGRAM ld.lld)
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# Ensure vendor dependencies use lld instead of ld
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list(APPEND CMAKE_ARGS -DCMAKE_EXE_LINKER_FLAGS=--ld-path=${LLD_PROGRAM})
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list(APPEND CMAKE_ARGS -DCMAKE_SHARED_LINKER_FLAGS=--ld-path=${LLD_PROGRAM})
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endif()
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if(APPLE)
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find_llvm_command(CMAKE_DSYMUTIL dsymutil)
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endif()
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endif()
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if(ENABLE_ANALYSIS)
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find_llvm_command(CLANG_FORMAT_PROGRAM clang-format)
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find_llvm_command(CLANG_TIDY_PROGRAM clang-tidy)
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endif()
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