autoconf usage : -DHAVE_GSL ?

[Brian Gough]

Peter Teuben writes:
 >  My question is about the kludgie looking -DHAVE_GSL. I wanted to
 > use something like
 >  AC_CHECK_LIB(gsl,gsl_version)
 >  but that fails, gsl_version seems to needs -lgslcblas! (which is
 > actually odd, if I look at the output of nm..... -static will fix
 > that dependancy, but AC_CHECK_LIB does not do that) I'd like to
 > know which function/static would be the one that doesn't need
 > another library. 

Function 'main' -- standard autoconf trick.