Laurence Finston wrote: > However, I think the problem was that the > location of the library is not in the "system search path", which is why I > need the options I mentioned in my original posting. I'm not the system > administrator on this machine and I can't do anything about changing this. > I haven't found any way of passing this information to Autoconf so it can > use these options when testing for the presence of the library and I > didn't find any discussion of this problem in the places I looked > before. People have already pointed you at how to write a configure test that sets its own *FLAGS for the duration of the test. But I'm confused, if your installation of GSL is in a strange place then why would you want to hard-code something like that into the package's configure.ac file? Shouldn't you instead just leave the configure test to use the standard autoconf variables and instead configure your package with: path/to/configure --some-options \ CPPFLAGS="-I/my/custom/gsl/location/include" \ LDFLAGS="-L/my/custom/gsl/location/lib" All of these *FLAGS are meant to be settable this way by the user when invoking configure if they have special needs, such as non-standard locations. You don't need to modify any files to achieve that. Brian _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf