[galib] compilation errors using g++

[Alejandro Marcos Aragón]

Hi all,

I have already a project and I'm at the point that I have to attach the GA 
part.  When I try to add something related to GA I received "undefined 
reference" error messages:

/home/aaragon/Desktop/MURI/gui/main.cxx:37: undefined reference to 
`GA2DBinaryStringGenome::GA2DBinaryStringGenome(unsigned int, unsigned int, 
float (*)(GAGenome&), void*)'
/home/aaragon/Desktop/MURI/gui/main.cxx:38: undefined reference to 
`GASimpleGA::GASimpleGA(GAGenome const&)'
/home/aaragon/Desktop/MURI/gui/main.cxx:39: undefined reference to 
`GASimpleGA::populationSize(unsigned int)'
/tmp/cc5Dbmh2.o: In function `main':
/usr/local/include/ga/GAParameter.h:78: undefined reference to 
`GAParameterList::set(char const*, void const*)'
/tmp/cc5Dbmh2.o: In function `pMutation':
/usr/local/include/ga/GABaseGA.h:186: undefined reference to 
`GAParameterList::set(char const*, double)'
/tmp/cc5Dbmh2.o: In function `pCrossover':
/usr/local/include/ga/GABaseGA.h:183: undefined reference to 
`GAParameterList::set(char const*, double)'
/tmp/cc5Dbmh2.o: In function `evolve':
/usr/local/include/ga/GABaseGA.h:138: undefined reference to 
`GAStatistics::flushScores()'
/tmp/cc5Dbmh2.o: In function `main':
/home/aaragon/Desktop/MURI/gui/main.cxx:47: undefined reference to 
`GAStatistics::bestIndividual(unsigned int) const'
/home/aaragon/Desktop/MURI/gui/main.cxx:118: undefined reference to 
`GASimpleGA::~GASimpleGA()'
/home/aaragon/Desktop/MURI/gui/main.cxx:118: undefined reference to 
`GA2DBinaryStringGenome::~GA2DBinaryStringGenome()'
/home/aaragon/Desktop/MURI/gui/main.cxx:19: undefined reference to 
`GARandomSeed(unsigned int)'
/home/aaragon/Desktop/MURI/gui/main.cxx:118: undefined reference to 
`GASimpleGA::~GASimpleGA()'
/home/aaragon/Desktop/MURI/gui/main.cxx:118: undefined reference to 
`GA2DBinaryStringGenome::~GA2DBinaryStringGenome()'
collect2: ld returned 1 exit status
make: *** [a.out] Error 1

Any ideas on what's going on?  The compilation was succesful and the header 
files are in the right place.  How do I fix this?

Thank you