included-gsl patch

[Torsten Veller]

Hi,

attached is a patch for included-gsl check. I think it is correct.

--with-included-gsl           -->  need_my_gsl=2
--wihout-included-gsl or none -->  need_my_gsl=1

It uses the included gsl if requested and
checks if the libs are installed, if either 
--without or nothing is passed to configure.
If they don't exist, the included lib is used.


BTW: my gcc (4.0.1) thinks it should point out:
     note: obsolete option -I- used, please use -iquote instead
-------------- next part --------------
--- configure.ac~	2005-09-06 01:52:58.000000000 +0200
+++ configure.ac	2005-09-06 01:53:13.000000000 +0200
@@ -695,7 +695,7 @@
 
 need_my_gsl=1
 AC_ARG_WITH(included-gsl, AC_HELP_STRING([--with-included-gsl],[force use of shipped GSL rather than system GSL]),
-if test "x$WITHVAL" != "xyes" ; then need_my_gsl=2 ; fi)
+if test "x$withval" = "xyes" ; then need_my_gsl=2 ; fi)
 
 if test "$need_my_gsl" = 1 ; then
   AM_PATH_GSL(1.4,