Compile c++ code using Magick++ and openMPI - c++

Question

I'm trying to compile my C++ code using Magick++ library to manipulate images in a distributed way using openMPI and I get some errors when I try to compile it.
This is my code:
#include "mpi.h"
#include <stdio.h>
#include <iostream>
#include <Magick++.h>
using namespace std;
using namespace Magick;
int main(int argc, char **argv){
int rank, numtask;
InitializeMagick(*argv);
Image image;
try {
// Read a file into image object
image.read( "test_image.jpg" );
image.type( GrayscaleType );
Blob blob;
image.magick( "JPEG" ); // Set JPEG output format
image.write( &blob );
}
catch( Exception &error_ ){
cout << "Caught exception: " << error_.what() << endl;
return 1;
}
//Now in the "distributed enviroment" I just print an hello world to test it.
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &numtask);
cout<<"HelloWorld\n";
MPI_Finalize();
}
this is the command that I type on the shell
mpiCC openmpi_project.cc -o openmpi_project
and this is the output of the shell
openmpi_project.cc:(.text+0x1d): undefined reference to
"Magick::InitializeMagick(char const*)"
openmpi_project.cc:(.text+0x29): undefined reference to
"Magick::Image::Image()"
openmpi_project.cc:(.text+0x5d): undefined reference to
"Magick::Image::read(std::string const&)"
openmpi_project.cc:(.text+0x86): undefined reference to
"Magick::Image::type(MagickCore::ImageType)"
openmpi_project.cc:(.text+0x92): rundefined reference to
"Magick::Blob::Blob()"
openmpi_project.cc:(.text+0xc6): undefined reference to
"Magick::Image::magick(std::string const&)"
openmpi_project.cc:(.text+0xf1): undefined reference to
"Magick::Image::write(Magick::Blob*)"
openmpi_project.cc:(.text+0xfd): undefined reference to
"Magick::Blob::~Blob()"
openmpi_project.cc:(.text+0x158): undefined reference to
"Magick::Image::~Image()"
openmpi_project.cc:(.text+0x1d3): undefined reference to
"Magick::Blob::~Blob()"
openmpi_project.cc:(.text+0x261): undefined reference to
"Magick::Image::~Image()"
/tmp/ccqFzUdy.o:(.gcc_except_table+0x58): undefined reference to
"typeinfo for Magick::Exception"

Answer 1

ImageMagick ships with config utilities. For Magick++ this utility is Magick++-config. See the Usage sub-section under the API docs.
LDFLAGS=$(Magick++-config --ldflags)
CXXFLAGS=$(Magick++-config --cxxflags)
$(CC) $CXXFLAGS openmpi_project.cc $LDFLAGS -o openmpi_project
Jump over to the MPI compiling/linking docs, and integrate Magick++'s additional flags to mpiCC
LDFLAGS=$(Magick++-config --ldflags)
CXXFLAGS=$(Magick++-config --cxxflags)
mpiCC --with-wrapper-cxxflags=$CXXFLAGS openmpi_project.cc \
--with-wrapper-ldflags=$LDFLAGS -o openmpi_project