Including LLVM in project causes Errors (Cmake)

Question

Im very unexperienced with CMAKE. Me and my friend wanted to make a programming language. The basic Lexer and Parser works fine. Now we wanted to include LLVM in the project to compile the language. But im get so much errors and i don't really now what and how to include LLVM.

That's my CMAKE file:

cmake_minimum_required(VERSION 3.22)
project(absturz)

set(CMAKE_CXX_STANDARD 14)
set(LLVM_PATH /usr/local/Cellar/llvm@13/13.0.1)

link_directories(${LLVM_PATH}/bin)
include_directories(${LLVM_PATH}/include)

add_definitions(
        -D__STDC_LIMIT_MACROS
        -D__STDC_CONSTANT_MACROS
)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -std=c++11")

add_executable(absturz main.cpp lang/Lexer.h lang/Token.h lang/src/Token.cpp lang/src/Lexer.cpp lang/Compiler.h lang/src/Compiler.cpp)

target_link_libraries(absturz
        /usr/local/Cellar/llvm@13/13.0.1/lib/libLLVMCore.a
        /usr/local/Cellar/llvm@13/13.0.1/lib/libLLVMSupport.a
        )

when I compile the project I get:

[1/1] Linking CXX executable absturz
FAILED: absturz 
: && /Library/Developer/CommandLineTools/usr/bin/c++ -fno-rtti -std=c++11 -g -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names  CMakeFiles/absturz.dir/main.cpp.o CMakeFiles/absturz.dir/lang/src/Token.cpp.o CMakeFiles/absturz.dir/lang/src/Lexer.cpp.o CMakeFiles/absturz.dir/lang/src/Compiler.cpp.o -o absturz -L/usr/local/Cellar/llvm@13/13.0.1/bin -Wl,-rpath,/usr/local/Cellar/llvm@13/13.0.1/bin  /usr/local/Cellar/llvm@13/13.0.1/lib/libLLVMCore.a  /usr/local/Cellar/llvm@13/13.0.1/lib/libLLVMSupport.a  /usr/local/Cellar/llvm@13/13.0.1/lib/libLLVMDemangle.a && :
Undefined symbols for architecture x86_64:
  "llvm::EngineBuilder::selectTarget()", referenced from:
      llvm::EngineBuilder::create() in Compiler.cpp.o
  "llvm::EngineBuilder::create(llvm::TargetMachine*)", referenced from:
      llvm::EngineBuilder::create() in Compiler.cpp.o
  "llvm::EngineBuilder::EngineBuilder(std::__1::unique_ptr<llvm::Module, std::__1::default_delete<llvm::Module> >)", referenced from:
      Compiler::compile() in Compiler.cpp.o
  "llvm::EngineBuilder::~EngineBuilder()", referenced from:
      Compiler::compile() in Compiler.cpp.o
  "llvm::dwarf::MacinfoString(unsigned int)", referenced from:
      WriteMDNodeBodyInternal(llvm::raw_ostream&, llvm::MDNode const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::dwarf::LanguageString(unsigned int)", referenced from:
      WriteMDNodeBodyInternal(llvm::raw_ostream&, llvm::MDNode const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::dwarf::ConventionString(unsigned int)", referenced from:
      WriteMDNodeBodyInternal(llvm::raw_ostream&, llvm::MDNode const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::dwarf::AttributeEncodingString(unsigned int)", referenced from:
      writeDIExpression(llvm::raw_ostream&, llvm::DIExpression const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
      WriteMDNodeBodyInternal(llvm::raw_ostream&, llvm::MDNode const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::dwarf::OperationEncodingString(unsigned int)", referenced from:
      writeDIExpression(llvm::raw_ostream&, llvm::DIExpression const*, (anonymous namespace)::TypePrinting*, llvm::SlotTracker*, llvm::Module const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::dwarf::TagString(unsigned int)", referenced from:
      (anonymous namespace)::MDFieldPrinter::printTag(llvm::DINode const*) in libLLVMCore.a(AsmWriter.cpp.o)
  "llvm::remarks::parseFormat(llvm::StringRef)", referenced from:
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::StringRef, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
  "llvm::remarks::RemarkStreamer::matchesFilter(llvm::StringRef)", referenced from:
      llvm::LLVMRemarkStreamer::emit(llvm::DiagnosticInfoOptimizationBase const&) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
  "llvm::remarks::RemarkStreamer::setFilter(llvm::StringRef)", referenced from:
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::StringRef, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
  "llvm::remarks::RemarkStreamer::RemarkStreamer(std::__1::unique_ptr<llvm::remarks::RemarkSerializer, std::__1::default_delete<llvm::remarks::RemarkSerializer> >, llvm::Optional<llvm::StringRef>)", referenced from:
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::StringRef, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
  "llvm::remarks::createRemarkSerializer(llvm::remarks::Format, llvm::remarks::SerializerMode, llvm::raw_ostream&)", referenced from:
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::StringRef, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
      llvm::setupLLVMOptimizationRemarks(llvm::LLVMContext&, llvm::raw_ostream&, llvm::StringRef, llvm::StringRef, bool, llvm::Optional<unsigned long long>) in libLLVMCore.a(LLVMRemarkStreamer.cpp.o)
  "_del_curterm", referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_set_curterm", referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_setupterm", referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
  "_tigetnum", referenced from:
      llvm::sys::Process::FileDescriptorHasColors(int) in libLLVMSupport.a(Process.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

OS: MacOS (Intel chip)

IDE: CLion

Does this answer your question? [Trouble running LLVM examples](https://stackoverflow.com/questions/70842268/trouble-running-llvm-examples) (see my answer to the question) — Alex Reinking, Sep 05 '22 at 18:21

Alex Reinking · Answer 1 · 2022-09-05T18:31:05.077

Linking directly to a library path in CMake is maybe the single strongest code-smell there is. It's the surströmming of CMake code. Don't open that can!

Use LLVM's own CMake support:

cmake_minimum_required(VERSION 3.22)
project(absturz)

set(CMAKE_CXX_STANDARD 14)

find_package(LLVM 13 REQUIRED)
llvm_map_components_to_libnames(
  LLVM_LIBRARIES
  Core
  Support
)

add_executable(absturz main.cpp lang/Lexer.h lang/Token.h lang/src/Token.cpp lang/src/Lexer.cpp lang/Compiler.h lang/src/Compiler.cpp)
target_include_directories(absturz PRIVATE ${LLVM_INCLUDE_DIRS})
target_compile_definitions(absturz PRIVATE ${LLVM_DEFINITIONS})
target_link_libraries(absturz PRIVATE ${LLVM_LIBRARIES})

Including LLVM in project causes Errors (Cmake)

1 Answers1