clang - How to fix missing libs while compiling with llvm-config? -

i'm trying compile code uses llvm/clang api compile 'hello_world' llvm ir:

#include <iostream>  #include <clang/driver/compilation.h> #include <clang/driver/driver.h> #include <clang/frontend/textdiagnosticprinter.h> #include <llvm/support/host.h> #include <llvm/support/program.h> #include <llvm/support/raw_ostream.h>  using namespace std; using namespace clang; using namespace clang::driver;  int main(int argc, char** argv) {     std::cout << "starting ----" << std::endl;      // [clang -s -emit-llvm ./test/hello_world.cpp]      // arguments pass clang driver:     //    clang getinmemory.c -lcurl -v     // path c file     string clangpath = "clang";      string inputpath = "./test/hello_world.cpp";     string outputpath = "hello_world.ll";      vector<const char *> args;     args.push_back(clangpath.c_str());     args.push_back("-s");     args.push_back("-emit-llvm");     args.push_back(inputpath.c_str());      // clang driver needs diagnosticsengine can report problems     clang::diagnosticoptions *options = new clang::diagnosticoptions();     //clang::textdiagnosticprinter *diagclient = new clang::textdiagnosticprinter(llvm::errs(), options);     clang::intrusiverefcntptr<clang::diagnosticids> diagid(new clang::diagnosticids());     clang::diagnosticsengine diags(diagid, options);      // create clang driver     clang::driver::driver thedriver(args[0], llvm::sys::getdefaulttargettriple(), outputpath, diags);      // c++ code     //thedriver.ccciscxx = true;      // create set of actions perform     clang::owningptr<clang::driver::compilation> compilation(thedriver.buildcompilation(args));      // print set of actions     thedriver.printactions(*compilation);      std::cout << "done ----" << std::endl;      // carry out actions     int res = 0;     smallvector<std::pair<int, const command *>, 4> failingcommands;     if (compilation)         res = thedriver.executecompilation(*compilation, failingcommands);      // report problems         /*     if (res < 0)         thedriver.generatecompilationdiagnostics(*compilation, failingcommands);         */     (smallvectorimpl< std::pair<int,         const command *> >::iterator = failingcommands.begin(),         ie = failingcommands.end(); != ie; ++it) {             int commandres = it->first;             const command *failingcommand = it->second;             if (!res)               res = commandres;              if (commandres < 0 || commandres == 70) {               thedriver.generatecompilationdiagnostics(*compilation, failingcommand);               break;             }       }      return res; } 

i decided use llvm-config correct compile/link params, i'm having link error (it seems libs still missing in -l):

mba-anton:build asmirnov$ clang++ `llvm-config --cxxflags` `llvm-config --ldflags` `llvm-config --libs all` ../clang_ir.cpp  undefined symbols architecture x86_64:   "clang::diagnosticids::diagnosticids()", referenced from:       _main in clang_ir-fb4166.o   "clang::diagnosticids::~diagnosticids()", referenced from:       llvm::refcountedbase<clang::diagnosticids>::release() const in clang_ir-fb4166.o   "clang::diagnosticsengine::diagnosticsengine(llvm::intrusiverefcntptr<clang::diagnosticids> const&, clang::diagnosticoptions*, clang::diagnosticconsumer*, bool)", referenced from:       _main in clang_ir-fb4166.o   "clang::diagnosticsengine::~diagnosticsengine()", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::compilation::~compilation()", referenced from:       llvm::owningptr<clang::driver::compilation>::~owningptr() in clang_ir-fb4166.o   "clang::driver::driver::buildcompilation(llvm::arrayref<char const*>)", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::driver::generatecompilationdiagnostics(clang::driver::compilation&, clang::driver::command const*)", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::driver::driver(llvm::stringref, llvm::stringref, llvm::stringref, clang::diagnosticsengine&)", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::driver::~driver()", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::driver::printactions(clang::driver::compilation const&) const", referenced from:       _main in clang_ir-fb4166.o   "clang::driver::driver::executecompilation(clang::driver::compilation const&, llvm::smallvectorimpl<std::__1::pair<int, clang::driver::command const*> >&) const", referenced from:       _main in clang_ir-fb4166.o ld: symbol(s) not found architecture x86_64 clang: error: linker command failed exit code 1 (use -v see invocation) mba-anton:build asmirnov$  

oh, forgot add clang libclang...a libs llvm-config relates llvm , not know clang.