wireless-10-145-113-144:gsl-matrix-view-test matthias$ gcc -lgsl -lgslcblas gsl-matrix-view-test.c -I /opt/local/include/ -L /opt/local/lib wireless-10-145-113-144:gsl-matrix-view-test matthias$ otool -L a.out a.out: /opt/local/lib/libgsl.0.dylib (compatibility version 18.0.0, current version 18.0.0) /opt/local/lib/libgslcblas.0.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1213.0.0) wireless-10-145-113-144:gsl-matrix-view-test matthias$ ./a.out GSL version: 1.16 A = 0x7fb6ca404b80 A->data = 0x7fb6ca803200 A->nrows = 40 A->ncols = 40 B = 0x7fb6ca404bc0 B->data = 0x7fb6ca806400 B->nrows = 40 B->ncols = 40 A_ul = 0x7fff5d212ad0 A_ul->data = 0x7fb6ca803200 A_ul->nrows = 20 A_ul->ncols = 20 B_lr = 0x7fff5d212aa0 B_lr->data = 0x7fb6ca807da0 B_lr->nrows = 20 B_lr->ncols = 20