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Copy pathtools.cmake
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141 lines (124 loc) · 5.17 KB
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# Compiler
if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
message (FATAL_ERROR "Compiler ${CMAKE_CXX_COMPILER_ID} is not supported. Please switch to Clang")
endif ()
# Print details to output
if (OS_WASM)
# `emcc` knows its own target and sysroot, and rejects being passed an empty one.
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
OUTPUT_VARIABLE COMPILER_SELF_IDENTIFICATION
COMMAND_ERROR_IS_FATAL ANY
OUTPUT_STRIP_TRAILING_WHITESPACE
)
else ()
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version --target=${CMAKE_CXX_COMPILER_TARGET} --sysroot=${CMAKE_SYSROOT}
OUTPUT_VARIABLE COMPILER_SELF_IDENTIFICATION
COMMAND_ERROR_IS_FATAL ANY
OUTPUT_STRIP_TRAILING_WHITESPACE
)
endif ()
message (STATUS "Using compiler:\n${COMPILER_SELF_IDENTIFICATION}")
# Require minimum compiler versions
set (CLANG_MINIMUM_VERSION 21)
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${CLANG_MINIMUM_VERSION})
message (FATAL_ERROR "Compilation with Clang version ${CMAKE_CXX_COMPILER_VERSION} is unsupported, the minimum required version is ${CLANG_MINIMUM_VERSION}.")
endif ()
string (REGEX MATCHALL "[0-9]+" COMPILER_VERSION_LIST ${CMAKE_CXX_COMPILER_VERSION})
list (GET COMPILER_VERSION_LIST 0 COMPILER_VERSION_MAJOR)
# Linker
option (LINKER_NAME "Linker name or full path")
if (LINKER_NAME MATCHES "gold")
message (FATAL_ERROR "Linking with gold is unsupported. Please use lld.")
endif ()
macro(ch_find_program var)
if (USING_DUMMY_LAUNCHERS)
set(${var} "${CMAKE_SOURCE_DIR}/cmake/dummy_compiler_linker.sh")
else()
unset(${var})
find_program(${var} ${ARGN})
endif()
endmacro()
if (NOT LINKER_NAME)
if (OS_LINUX AND NOT ARCH_S390X)
ch_find_program (LLD_PATH NAMES "ld.lld-${COMPILER_VERSION_MAJOR}" "ld.lld")
elseif (OS_DARWIN)
ch_find_program (LLD_PATH NAMES "ld64.lld-${COMPILER_VERSION_MAJOR}" "ld64.lld" "ld")
# Duplicate libraries passed to the linker is not a problem.
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-no_warn_duplicate_libraries")
endif ()
if (LLD_PATH)
if (OS_LINUX OR OS_DARWIN)
# Clang driver simply allows full linker path.
set (LINKER_NAME ${LLD_PATH})
endif ()
endif()
endif()
if (LINKER_NAME)
ch_find_program (LLD_PATH NAMES ${LINKER_NAME})
if (NOT LLD_PATH)
message (FATAL_ERROR "Using linker ${LINKER_NAME} but can't find its path.")
endif ()
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --ld-path=${LLD_PATH}")
endif ()
if (LINKER_NAME)
message(STATUS "Using linker: ${LINKER_NAME}")
elseif (OS_WASM)
# `emcc` drives `wasm-ld` itself and takes no `--ld-path`.
message(STATUS "Using linker: <wasm-ld, through emcc>")
elseif (NOT ARCH_S390X AND NOT OS_FREEBSD AND NOT OS_SUNOS)
message (FATAL_ERROR "The only supported linker is LLVM's LLD, but we cannot find it.")
else ()
message(STATUS "Using linker: <default>")
endif ()
# Archiver
ch_find_program (LLVM_AR_PATH NAMES "llvm-ar-${COMPILER_VERSION_MAJOR}" "llvm-ar")
if (LLVM_AR_PATH)
set (CMAKE_AR "${LLVM_AR_PATH}")
endif ()
message(STATUS "Using archiver: ${CMAKE_AR}")
# Ranlib
ch_find_program (LLVM_RANLIB_PATH NAMES "llvm-ranlib-${COMPILER_VERSION_MAJOR}" "llvm-ranlib")
if (LLVM_RANLIB_PATH)
set (CMAKE_RANLIB "${LLVM_RANLIB_PATH}")
endif ()
message(STATUS "Using ranlib: ${CMAKE_RANLIB}")
# Install Name Tool
ch_find_program (LLVM_INSTALL_NAME_TOOL_PATH NAMES "llvm-install-name-tool-${COMPILER_VERSION_MAJOR}" "llvm-install-name-tool")
if (LLVM_INSTALL_NAME_TOOL_PATH)
set (CMAKE_INSTALL_NAME_TOOL "${LLVM_INSTALL_NAME_TOOL_PATH}")
endif ()
message(STATUS "Using install-name-tool: ${CMAKE_INSTALL_NAME_TOOL}")
# Objcopy
ch_find_program (OBJCOPY_PATH NAMES "llvm-objcopy-${COMPILER_VERSION_MAJOR}" "llvm-objcopy" "objcopy")
if (OBJCOPY_PATH)
message (STATUS "Using objcopy: ${OBJCOPY_PATH}")
else ()
message (FATAL_ERROR "Cannot find objcopy.")
endif ()
# nm (used by helper scripts that inspect symbol tables, e.g. cmake/localize_rust_c_symbols.sh)
ch_find_program (NM_PATH NAMES "llvm-nm-${COMPILER_VERSION_MAJOR}" "llvm-nm" "nm")
if (NM_PATH)
message (STATUS "Using nm: ${NM_PATH}")
else ()
message (FATAL_ERROR "Cannot find nm.")
endif ()
# Strip
ch_find_program (STRIP_PATH NAMES "llvm-strip-${COMPILER_VERSION_MAJOR}" "llvm-strip" "strip")
if (STRIP_PATH)
message (STATUS "Using strip: ${STRIP_PATH}")
else ()
message (FATAL_ERROR "Cannot find strip.")
endif ()
if (OS_DARWIN AND NOT CMAKE_TOOLCHAIN_FILE)
# utils/list-licenses/list-licenses.sh (which generates system table system.licenses) needs the GNU versions of find and grep. These are
# not available out-of-the-box on Mac. As a special case, Darwin builds in CI are cross-compiled from x86 Linux where the GNU userland is
# available.
find_program(GFIND_PATH NAMES "gfind")
if (NOT GFIND_PATH)
message (FATAL_ERROR "GNU find not found. You can install it with 'brew install findutils'.")
endif()
find_program(GGREP_PATH NAMES "ggrep")
if (NOT GGREP_PATH)
message (FATAL_ERROR "GNU grep not found. You can install it with 'brew install grep'.")
endif()
endif ()