Hi all,
I tried to send this before and I think it didn't work. I am sorry if you receive it again.
I have been working on a code for a while that uses the conflict graph libraries of GLPK. The code compiles perfectly in a Linux machine. However, when I try to compile it on a MacOS X (via the console) I get some linking errors.
To give you an idea of my problem, I attached bellow a makefile and two trivial applications: main1.cpp is an application that reads clique4.lp, generates the conflict graph, and prints the number of vertices of such graph. As I mentioned, the code compiles perfectly in Linux using the same makefile (after updating the corresponding paths). In MacOS X, I get the following error:
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Undefined symbols for architecture x86_64:
"__glp_cfg_build_graph", referenced from:
_main in main1-5183c5.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [main1] Error 1
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To make sure there was no issues with the installation of GLPK or the path to the libraries, I created main2.cpp, which is an applications that simply reads and solves clique4.lp. Contrary to the previous case, main2.cpp compiles and runs perfectly.
I have tried many things, but I haven't been able to make it work. I hope you guys can help.
Regards,
Attachments:
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main1.cpp
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#include <iostream>
extern "C" {
#include <glpk.h>
#include "cfg.h"
#include "env.h"
#include "prob.h"
}
int main(int argc, const char * argv[])
{
glp_prob *P;
CFG *G;
int nV, v, u, degree;
P = glp_create_prob();
glp_read_lp(P, NULL, "./clique4.lp");
G = cfg_build_graph(P);
nV = G->nv;
std::cout<<"# vertices: "<<nV<<std::endl;
int *ref = G->ref;
int *neg = G->neg;
int *pos = G->pos;
for (v = 1; v <= nV; v++){
std::cout<<"vertex "<<v<<" --> variable "<<ref[v]<<"\n";
std::cout<<" pos "<<pos[ref[v]]<<" neg "<<neg[ref[v]]<<"\n";
}
return 0;
}
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main2.cpp
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#include <iostream>
extern "C" {
#include <glpk.h>
}
int main(int argc, const char * argv[])
{
glp_prob *P;
P = glp_create_prob();
glp_read_lp(P, NULL, "./clique4.lp");
glp_simplex(P, NULL);
return 0;
}
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Makefile
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CPP = g++
ARGS = -m64 -g
GLPKPATH = /Users/jwalteros/Applications/GLPK/glpk-4.54
GLPKLIBPATH = /usr/local
GLPK = $(GLPKLIBPATH)/include/
GLPKSRC = $(GLPKPATH)/src/
GLPKCGLIB = $(GLPKPATH)/src/cglib/
GLPKENV = $(GLPKPATH)/src/env/
GLPKMISC = $(GLPKPATH)/src/misc/
LIBGLPK = $(GLPKLIBPATH)/lib/
all: main1 main2
main1:
$(CPP) $(ARGS) -o main1 main1.cpp -I$(GLPK) -I$(GLPKSRC) -I$(GLPKCGLIB) \
-I$(GLPKENV) -I$(GLPKENV) -I$(GLPKMISC) -L$(LIBGLPK) -lglpk
main2:
$(CPP) $(ARGS) -o main2 main2.cpp -I$(GLPK) -L$(LIBGLPK) -lglpk
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