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Merged
edsiper merged 1 commit into from
Sep 3, 2026
Merged

wamrc: Build with LLVM-17 #12338

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34 changes: 32 additions & 2 deletions src/wamrc/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -173,6 +173,11 @@ if (LLVM_FOUND)
message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")

# LLVM 16 and later require C++17 to consume their headers.
if (LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 16)
set (CMAKE_CXX_STANDARD 17)
endif ()

set (WAMR_ROOT_DIR ../../${FLB_PATH_LIB_WASM_MICRO_RUNTIME})
set (SHARED_DIR ${WAMR_ROOT_DIR}/core/shared)
set (IWASM_DIR ${WAMR_ROOT_DIR}/core/iwasm)
Expand Down Expand Up @@ -224,18 +229,43 @@ if (LLVM_FOUND)
${IWASM_INTERP_SOURCE}
${IWASM_AOT_SOURCE})
add_library (aotclib-static STATIC ${IWASM_COMPL_SOURCE})

# LLVM 17 and older headers don't compile with GCC 14+ when assertions are
# enabled: the assert() in llvm::cast_if_present<> instantiates
# isa<llvm::Metadata>() and fails with
# "'classof' is not a member of 'llvm::Metadata'".
# Keep this narrowed to the affected compiler so that debug builds elsewhere
# keep their assertions.
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 14
AND LLVM_PACKAGE_VERSION VERSION_LESS 18)
target_compile_definitions (aotclib-static
PRIVATE $<$<COMPILE_LANGUAGE:CXX>:NDEBUG>)
endif ()
add_executable (flb-wamrc-bin ${WAMR_ROOT_DIR}/wamr-compiler/main.c)

# Debian/Ubuntu's llvm-<N>-dev packages export the omptarget imported targets
# in LLVM_AVAILABLE_LIBS although their shared objects are shipped by the
# libomp-<N>-dev package, which may not be installed. Linking against them
# then breaks the build with:
#
# No rule to make target '/usr/lib/llvm-17/lib/libomptarget.so.17',
# needed by 'bin/flb-wamrc'
#
# wamrc doesn't need them, so drop them.
set (FLB_WAMRC_LLVM_LIBS ${LLVM_AVAILABLE_LIBS})
list (FILTER FLB_WAMRC_LLVM_LIBS EXCLUDE REGEX "^omptarget")

if (NOT MSVC)
target_link_libraries (flb-wamrc-bin aotclib-static vmlib-wamrc-static LLVMDemangle ${LLVM_AVAILABLE_LIBS} ${lib_ubsan}
target_link_libraries (flb-wamrc-bin aotclib-static vmlib-wamrc-static LLVMDemangle ${FLB_WAMRC_LLVM_LIBS} ${lib_ubsan}
-lm -lpthread ${lib_lldb} ${UV_A_LIBS})
if (MINGW)
target_link_libraries (flb-wamrc-bin -lssp -lWs2_32)
else()
target_link_libraries (flb-wamrc-bin -ldl)
endif()
else()
target_link_libraries (flb-wamrc-bin aotclib-static vmlib-wamrc-static ${lib_lldb} ${LLVM_AVAILABLE_LIBS} ${lib_ubsan}
target_link_libraries (flb-wamrc-bin aotclib-static vmlib-wamrc-static ${lib_lldb} ${FLB_WAMRC_LLVM_LIBS} ${lib_ubsan}
${UV_A_LIBS})
endif()

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