Originally posted by: SystemAdmin

[jp.dubus said:]

Hi everybody,

I have some compilation problem with the concert library for C++ interface of CPLEX, if i write that kind of code :

// This code is in the file "test.cpp"
#include <cstring>
#include <climits>
#include <ilcplex/ilocplex.h>

int main(int argc, char** argv) {
  IloEnv env;
  IloNumVarArray varArray(env, 1, - IloInfinity, IloInfinity);
  IloExpr e;
  e += varArray[0];
  env.end();
  return 0;
}


And if i'm trying to compile with :

g++ -o test -I/home/jp/ilog/cplex111/include/ -I/home/jp/ilog/concert26/include/ -L/home/jp/ilog/cplex111/lib/x86_debian4.0_4.1/static_pic/ -L/home/jp/ilog/concert26/lib/x86_debian4.0_4.1/static_pic/ -fPIC -fexceptions -m32 -DNDEBUG -DIL_STD -O -lcplex -lilocplex -lconcert -lm -lpthread test.cpp


The compilation failed with this output :

/tmp/cctZRRcg.o: In function `main':
test.cpp:(.text+0x76): undefined reference to `IloEnv::IloEnv()'
test.cpp:(.text+0xac): undefined reference to `IloNumVarArray::IloNumVarArray(IloEnv, long, double, double, IloNumVar::Type)'
test.cpp:(.text+0xcc): undefined reference to `IloExpr::operator+=(IloNumVar)'
test.cpp:(.text+0xdb): undefined reference to `IloEnvI::~IloEnvI()'
collect2: ld a retourné 1 code d'état d'exécution


Someone has an idea to solve this problem ?

Thank you very much,

Jean-Philippe Dubus
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[EdKlotz said:]

Try compiling one of the C++ examples that comes with the software distribution first, using the Makefile that is also provided.  Start with that.

That said, I recent heard from another user that he too got C++ compiler
errors with Ubuntu, so there may be some inconsistency between the Ubuntu
C++ compiler and the gcc 4.1 compiler that was used to build the CPLEX distribution.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[jp.dubus said:]

Problem solved (shame on me) : the -lxxx options of g++ were not at the end of my compilation command
#CPLEXOptimizers
#DecisionOptimization