Using darwinports/development libraries

I am trying to build an application that needs a gnu library. I installed the most recent darwinports, 1.7.0

And then gsl and gsl-devel.
Gsl version 1.12 - How to Download and Install on Mac OS X

I just did a sudo port install gsl and sudo port install gsl-devel.

I did 'make' on an application to build but I get an error like the gsl-devel headers aren't found. I performed the same steps and get the same errors on Linux but I just installed gsl and was able to build.

What do I do to get macports/darwin ports to be recognized.

The application is here.

Building Polyworld from scratch

It probably didn't work because all of the MacPorts files are contained in /opt/local. So, you need to point the configure script (assuming this is a traditional ./configure, make, make install) to the proper directory of the libs.

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