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Improved CMake integration of LLVM (#2103)

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Added the paths for the CMake config files for LLVM 19 and higher to ``CMAKE_PREFIX_PATH``,
so that they will also be searched automatically.
This commit is contained in:
niedlich
2025-04-23 11:41:26 +02:00
committed by GitHub
parent a0d4df2272
commit fd2a81afb1
1 changed files with 14 additions and 0 deletions
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14
CMakeLists.txt
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@@ -144,6 +144,20 @@ if(C3_WITH_LLVM)
find_package(LLVM REQUIRED CONFIG)
find_package(LLD REQUIRED CONFIG)
else()
# Add paths for LLVM CMake files of version 19 and higher as they follow a new installation
# layout and are now in /usr/lib/llvm/*/lib/cmake/llvm/ rather than /usr/lib/cmake/llvm/
#
# Because of CMAKE_FIND_PACKAGE_SORT_ORDER CMAKE_FIND_PACKAGE_SORT_DIRECTION,
# the newest version will always be found first.
message(STATUS "CMAKE_PREFIX_PATH: ${CMAKE_PREFIX_PATH}")
if (DEFINED LLVM_DIR)
message(STATUS "Looking for LLVM CMake files in user-specified directory ${LLVM_DIR}")
else()
file (GLOB LLVM_CMAKE_PATHS "/usr/lib/llvm/*/lib/cmake/llvm/")
list (APPEND CMAKE_PREFIX_PATH ${LLVM_CMAKE_PATHS} "/usr/lib/")
message(STATUS "No LLVM_DIR specified, searching default directories ${CMAKE_PREFIX_PATH}")
endif()
if (NOT C3_LLVM_VERSION STREQUAL "auto")
find_package(LLVM ${C3_LLVM_VERSION} REQUIRED CONFIG)
else()