mcsim 5.4.0 Mac OS X 10.82 Mountain Lion build errors

[Christopher Ruark]

I'm trying to build mcsim 5.4.0 on my Mac OS X 10.8.2 Mountain Lion.  I've also 
installed GNU gsl through MacPorts.  I run ./configure without a problem.  When 
I type make I get this error at the bottom:

ld: library not found for -lgsl
collect2: error: ld returned 1 exit status
make[2]: *** [libmcsim.la] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

When I install libsbml-5.7.0-libxml2-macosx-mountainlion.dmg and then rerun the 
./configure and type make I receive this error:

modiSBML2.c:53:29: fatal error: sbml/SBMLReader.h: No such file or directory
compilation terminated.
make[2]: *** [modiSBML2.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

Suggestions?

Thanks!

Chris