Undefined symbols for architecture x86_64 (curlpp)

In the project I'm working on, I'm trying to use the curlpp library to make a simple html GET request. I pass the cpp file to clang++ with the following options:

clang++ -std=c++11 -stdlib=libc++ -I /usr/local/Cellar url_test.cpp

I then get these errors:

Undefined symbols for architecture x86_64:
  "curlpp::OptionBase::OptionBase(CURLoption)", referenced from:
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::Option(CURLoption, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in url_test-541b93.o
  "curlpp::OptionBase::~OptionBase()", referenced from:
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::Option(CURLoption, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in url_test-541b93.o
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::~Option() in url_test-541b93.o
  "curlpp::UnsetOption::UnsetOption(char const*)", referenced from:
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::updateMeToOption(curlpp::OptionBase const&) in url_test-541b93.o
      curlpp::OptionTrait<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, (CURLoption)10002>::updateHandleToMe(curlpp::internal::CurlHandle*) const in url_test-541b93.o
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::getValue() const in url_test-541b93.o
  "curlpp::RuntimeError::~RuntimeError()", referenced from:
      curlpp::UnsetOption::~UnsetOption() in url_test-541b93.o
  "curlpp::libcurlRuntimeAssert(char const*, CURLcode)", referenced from:
      void curlpp::internal::CurlHandle::option<void*>(CURLoption, void*) in url_test-541b93.o
  "curlpp::Easy::perform()", referenced from:
      _main in url_test-541b93.o
  "curlpp::Easy::Easy()", referenced from:
      _main in url_test-541b93.o
  "curlpp::Easy::~Easy()", referenced from:
      _main in url_test-541b93.o
  "curlpp::Cleanup::Cleanup()", referenced from:
      _main in url_test-541b93.o
  "curlpp::Cleanup::~Cleanup()", referenced from:
      _main in url_test-541b93.o
  "curlpp::OptionBase::operator<(curlpp::OptionBase const&) const", referenced from:
      vtable for curlpp::OptionTrait<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, (CURLoption)10002> in url_test-541b93.o
      vtable for curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > in url_test-541b93.o
  "typeinfo for curlpp::LogicError", referenced from:
      GCC_except_table0 in url_test-541b93.o
  "typeinfo for curlpp::OptionBase", referenced from:
      curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >::updateMeToOption(curlpp::OptionBase const&) in url_test-541b93.o
      typeinfo for curlpp::Option<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > in url_test-541b93.o
  "typeinfo for curlpp::RuntimeError", referenced from:
      GCC_except_table0 in url_test-541b93.o
      typeinfo for curlpp::UnsetOption in url_test-541b93.o
  "_curl_easy_setopt", referenced from:
      void curlpp::internal::CurlHandle::option<void*>(CURLoption, void*) in url_test-541b93.o
ld: symbol(s) not found for architecture x86_64

which I think means that the compiler cannot find any of the curlpp libraries.

Here's the code I'm trying to run:

  1 #include <string>
  2 #include <sstream>
  3 #include <iostream>
  4 #include <curlpp/cURLpp.hpp>
  5 #include <curlpp/Easy.hpp>
  6 #include <curlpp/Options.hpp>
  7 #include <fstream>
  8 
  9 using namespace curlpp::options;
 10 
 11 int main(int, char **)
 12 {
 13     try
 14     {
 15         curlpp::Cleanup testCleanup;
 16         curlpp::Easy miRequest;
 17         miRequest.setOpt<Url>("http://www.wikipedia.org");
 18         miRequest.perform();
 19     }
 20     catch(curlpp::RuntimeError & e)
 21     {
 22         std::cout << e.what() << std::endl;
 23     }
 24     catch(curlpp::LogicError & e)
 25     {
 26         std::cout << e.what() << std::endl;
 27     }
 28 
 29     return 0;
 30 }

I'm running macOS Sierra 10.12.4 with Xcode command line tools and homebrew installed. I homebrew'd the curlpp library. I know that someone else was able to compile this project on Ubuntu 16.04 using gcc, so I think the issue is to do with macOS.

I'm quite new to cpp, so any help would be greatly appreciated!

You have to tell the compiler which libraries to link with your executable. In your case, the issue is solved by adding options -lcurlpp -lcurl.

By the way, the path you provide is not correct since headers actually reside in /usr/local/Cellar/curlpp/[insert version here]/include. Anyways, this compiles fine without adding include search path for libraries installed via homebrew since it automatically creates symlinks in /usr/local/include, which is one of default places for a compiler to search.