compiling GSL on digital unix.

[Brian Gough]

Tim Mooney writes:
 > ... I would be willing to submit additional code to configure.in to
 > augment the code that's in CVS already, so that we actually check
 > to make sure that gcc groks that option, rather than assuming.  The
 > problem is that I don't think there's an equivalent option in
 > 2.7.2.x, so code compiled with that version of gcc (including
 > libgsl) would not be fully IEEE compliant.

Testing the additions to CFLAGs would be nice feature. If the -mieee
option is unavailable then the user could get a warning from the
configure script.