CMakeLists.txt

cmake_minimum_required(VERSION 3.14)

project(faustuserprojectwithllvm)

get_filename_component(MYLIBFAUSTEMBEDDED_ROOT
                       "${CMAKE_CURRENT_LIST_DIR}/../"
                       ABSOLUTE)

add_compile_definitions(_GLIBCXX_USE_CXX11_ABI=0)
message(/usr/lib/${CMAKE_SYSTEM_PROCESSOR}-linux-gnu/libz3.so)
message(${MYLIBFAUSTEMBEDDED_ROOT}/libfaust-ubuntu-x86_64/lib/libfaustwithllvm.a)

add_executable(faustuserprojectwithllvm ${MYLIBFAUSTEMBEDDED_ROOT}/source/main0.cpp)
target_compile_features(faustuserprojectwithllvm PRIVATE cxx_std_11)
  
target_link_libraries(faustuserprojectwithllvm PUBLIC 
  ${MYLIBFAUSTEMBEDDED_ROOT}/libfaust-ubuntu-x86_64/lib/libfaustwithllvm.a
  rt 
  dl 
  m
  /usr/lib/${CMAKE_SYSTEM_PROCESSOR}-linux-gnu/libz3.so
  z 
  tinfo 
  xml2)

target_include_directories(
    faustuserprojectwithllvm
    PUBLIC
    "${MYLIBFAUSTEMBEDDED_ROOT}/faust-2.69.3/architecture"
)

main.cpp

// Copied from llvm-test.cpp

#include <iostream>
#include <fstream>
#include <sstream>
#include <thread>
#include <vector>

#include "faust/dsp/llvm-dsp.h"
#include "faust/audio/dummy-audio.h"
#include "faust/gui/DecoratorUI.h"
#include "faust/gui/PrintUI.h"
#include "faust/misc.h"

// To do CPU native compilation
#ifndef JIT_TARGET
#define JIT_TARGET ""
#endif

static void printList(const std::vector<std::string>& list)
{
    for (int i = 0; i < list.size(); i++) {
        std::cout << "item: " << list[i] << "\n";
    }
}

extern "C" float foobar()
{
    // printf("Hello\n");
    return 42.0f;
}

void foo(int argc, const char* argv[])
{ 

  registerForeignFunction("foobar");
  
  std::string error_msg;
  llvm_dsp_factory* factory = createDSPFactoryFromFile(argv[argc-1], argc, argv, JIT_TARGET, error_msg, -1);
  if (!factory) {
      std::cerr << "Cannot create factory : " << error_msg;
      exit(EXIT_FAILURE);
  }
  
  std::cout << "getCompileOptions " << factory->getCompileOptions() << std::endl;
  printList(factory->getLibraryList());
  printList(factory->getIncludePathnames());
  
  dsp* DSP = factory->createDSPInstance();
  if (!DSP) {
      std::cerr << "Cannot create instance "<< std::endl;
      exit(EXIT_FAILURE);
  }
  
  std::cout << "getName " << factory->getName() << std::endl;
  std::cout << "getSHAKey " << factory->getSHAKey() << std::endl;
  
  dummyaudio audio(1);
  if (!audio.init("FaustDSP", DSP)) {
      exit(EXIT_FAILURE);
  }
  
  audio.start();
  audio.stop();
  
  delete DSP;
  deleteDSPFactory(factory);
}

int main(int argc, char* argv[])
{
    std::cout << "Libfaust version : " << getCLibFaustVersion () << std::endl;
    std::cout << "getDSPMachineTarget " << getDSPMachineTarget() << std::endl;
    
    int fargc = argc - 1;
    char* fargv[fargc];
    
    for (size_t i = 0; i < fargc; i++) {
        fargv[i] = argv[i+1]; 
        std::cout << i << " : " << fargv[i] << std::endl;
    }
    auto cfargv = const_cast<const char **>(fargv);
    foo(fargc, cfargv);
    
    return 0;
}

result

❯ build-prebuilt/faustuserprojectwithllvm -I faust-2.69.3/libraries dsp1.dsp          
Libfaust version : 2.69.3 (LLVM 15.0.7)
getDSPMachineTarget x86_64-linux-gnu:tigerlake
0 : -I
1 : faust-2.69.3/libraries
2 : dsp1.dsp
getCompileOptions -lang llvm 15.0.7 -ct 1 -es 1 -mcd 16 -single -ftz 0
item: /home/xox/Sync/SyncMore/mylibfaustembedded/faust-2.69.3/libraries/stdfaust.lib
item: /home/xox/Sync/SyncMore/mylibfaustembedded/dsp1.dsp
item: /home/xox/Sync/SyncMore/mylibfaustembedded/faust-2.69.3/libraries
item: /usr/local/share/faust
item: /usr/local/share/faust
item: /usr/share/faust
item: .
item: /home/xox/Sync/SyncMore/mylibfaustembedded
getName dsp1
getSHAKey 930EB205B25119EF54FB56507C16373AF82BC6CF
Render one buffer
[1]    67777 segmentation fault  build-prebuilt/faustuserprojectwithllvm -I faust-2.69.3/libraries dsp1.dsp