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3f640ef3d2
This commit reworks the LLVM/Clang/LLD discovery process for CMake. The
biggest changes are that:
1. We search for LLVM from most preferred directory to least, skipping
any `llvm-config` that is the wrong version, or that doesn't
support the requested link mode ("static" or "shared").
2. `ZIG_PREFER_CLANG_CPP_DYLIB` has been renamed to `ZIG_SHARED_LLVM`,
to better align with `ZIG_STATIC_LLVM`.
3. We only search for LLVM in the same directory alongside LLVM.
4. LLVM's link mode is forwarded to Clang, so that we can look for the
appropriate shared/static libraries.
5. We use `--link-static` when querying `--system-libs` from llvm-config,
so that this will include libz and other dependencies for
statically linking LLD
44 lines
1.3 KiB
CMake
44 lines
1.3 KiB
CMake
# Copyright (c) 2017 Andrew Kelley
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# This file is MIT licensed.
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# See http://opensource.org/licenses/MIT
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# LLD_FOUND
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# LLD_INCLUDE_DIRS
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# LLD_LIBRARIES
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find_path(LLD_INCLUDE_DIRS NAMES lld/Common/Driver.h
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HINTS ${LLVM_INCLUDE_DIRS}
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NO_DEFAULT_PATH # Only look for LLD next to LLVM
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)
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find_library(LLD_LIBRARY NAMES lld-14.0 lld140 lld NAMES_PER_DIR
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HINTS ${LLVM_LIBDIRS}
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NO_DEFAULT_PATH # Only look for LLD next to LLVM
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)
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if(EXISTS ${LLD_LIBRARY})
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set(LLD_LIBRARIES ${LLD_LIBRARY})
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else()
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macro(FIND_AND_ADD_LLD_LIB _libname_)
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string(TOUPPER ${_libname_} _prettylibname_)
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find_library(LLD_${_prettylibname_}_LIB NAMES ${_libname_} NAMES_PER_DIR
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HINTS ${LLVM_LIBDIRS}
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NO_DEFAULT_PATH # Only look for LLD next to LLVM
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)
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if(LLD_${_prettylibname_}_LIB)
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set(LLD_LIBRARIES ${LLD_LIBRARIES} ${LLD_${_prettylibname_}_LIB})
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endif()
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endmacro(FIND_AND_ADD_LLD_LIB)
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FIND_AND_ADD_LLD_LIB(lldMinGW)
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FIND_AND_ADD_LLD_LIB(lldELF)
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FIND_AND_ADD_LLD_LIB(lldCOFF)
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FIND_AND_ADD_LLD_LIB(lldWasm)
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FIND_AND_ADD_LLD_LIB(lldMachO)
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FIND_AND_ADD_LLD_LIB(lldCommon)
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(lld DEFAULT_MSG LLD_LIBRARIES LLD_INCLUDE_DIRS)
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mark_as_advanced(LLD_INCLUDE_DIRS LLD_LIBRARIES)
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