############################################################
# Building 'tdgesv' and sample output on vnfe1, a Trisum
# PIII running Linux 2.2.14.
#############################################################
vnfe1% pwd; ls
/home/phys410/linsys/ex1
Makefile  tdgesv.f

vnfe1% printenv LIBBLAS
-lblas

vnfe1% cat Makefile
############################################################
#  IMPORTANT: Note the use of LIBBLAS which should be 
#  set to '-lblas' on the SGI and Linux machines.  
#  BLAS is a acronym for Basic Linear Algebra Support 
#  and is a Fortran- and C-callable library which implements 
#  basic manipulations useful in numerical linear algebra.
############################################################
.IGNORE:

F77_COMPILE  = $(F77) $(F77FLAGS) $(F77CFLAGS)
F77_LOAD     = $(F77) $(F77FLAGS) $(F77LFLAGS)

.f.o:
   $(F77_COMPILE) $*.f

EXECUTABLES = tdgesv

all: $(EXECUTABLES)

tdgesv: tdgesv.o 
   $(F77_LOAD) tdgesv.o -llapack $(LIBBLAS) -o tdgesv

clean:
   rm *.o
   rm $(EXECUTABLES)

vnfe1% make
f77 -g -c tdgesv.f
f77 -g -L/usr/local/lib tdgesv.o -llapack -lblas -o tdgesv

vnfe1% tdgesv
  5.42636441 -0.325775377 -0.408350807