Question

I recently have a project using GSL. After I installed the GSL package on Mac 10.6.3. I cannot compile my code.

The gsl lib is located at /usr/local/lib, and the head file located at /usr/local/.

When I compile my code I get the the following error. If I do not specify “-m32” in the makefile, it still gives the same error, just change “i386” to “x86_64”. Can anyone help me?

Thank you!

#include <gsl/gsl_vector.h>
#include <gsl/gsl_multiroots.h>

By the way, should I include gsl like the above? actually I am quite new to programming.

Undefined symbols for architecture i386:
"_gsl_vector_get", referenced from:
  gsl_root_finding::print_state(unsigned long, gsl_multiroot_fdfsolver*)in test_guide.o
  gsl_root_finding::print_state(unsigned long, gsl_multiroot_fsolver*)in test_guide.o
  gsl_root_finding::mm_f(gsl_vector const*, void*, gsl_vector*)in test_guide.o
  gsl_root_finding::process(int, double*, double, double)in test_guide.o
  gsl_root_finding::mm_fdf(gsl_vector const*, void*, gsl_vector*, gsl_matrix*)in test_guide.o
  gsl_root_finding::mm_df(gsl_vector const*, void*, gsl_matrix*)in test_guide.o
"_gsl_vector_set", referenced from:
  gsl_root_finding::mm_f(gsl_vector const*, void*, gsl_vector*)in test_guide.o
  gsl_root_finding::process(int, double*, double, double)in test_guide.o
  gsl_root_finding::mm_fdf(gsl_vector const*, void*, gsl_vector*, gsl_matrix*)in test_guide.o
  gsl_root_finding::mm_df(gsl_vector const*, void*, gsl_matrix*)in test_guide.o

ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
make: *** [test_guide] Error 1

The build code:

CC = g++
OPT = -pg -g -I../include -L../libs -I../../Matrix-1.0/include -I../../bessel-1.1/include  -L../../Matrix-1.0/libs -L../../bessel-1.1/libs -L/usr/local/lib
LIBS =  -lfmm -lssi -lsparse -lbessel -lg2c -lgfortran -lgsl
.SUFFIXES : .o .cpp 

test_guide: test_guide.o
  ${CC} -o $@ ${OPT} test_guide.o ${LIBS} 

Answer 1

I’m not sure, but I think you’ll need to link with GSL’s BLAS library as well. Your x86_64 undefined reference seems to imply as much (blas.o is the hint I’m going on). Just add

-lgslcblas

to your LIBS variable.