Make compilation against GSL 2.3 & 2.4 succeed

[djerius]

This patch includes the minimal changes to allow compilation under GSL 2.3 & GSL 2.4

[leto]

@djerius thanks for this! Have you tested compiling the code when older GSL versions are present, to make sure that still works? Looks like Travis CI is not happy: https://travis-ci.org/leto/math--gsl/builds/290065663

Looks like a great start, let me know how I can help you debug. I didn't even see these GSL releases come out 😸

[djerius]

Have you tested compiling the code when older GSL versions are present, to make sure that still works?

I was hoping that travis would do that, but that leads to your next statement:

Looks like Travis CI is not happy: https://travis-ci.org/leto/math--gsl/builds/290065663

Travis isn't even getting to the module testing phase. There's something in the setup which is giving it conniptions. All of the tests fail with:

git rev-parse master

fatal: Not a git repository (or any of the parent directories): .git

The command "./_travis/before_install.sh" failed and exited with 128 during .

Your build has been stopped.

I'm not at all familiar with travis, so help would be appreciated.

[djerius]

I've fixed the bug in the travis before_install script (and made a few other changes), so builds are now running properly and I can get results against the other versions of GSL.

[anadon]

I'm running into odd things with this as well (#146 #147 ). I think this does need some active attention and is related.

[leto]

@djerius it does seem that your patch makes the latest version work, but all previous versions are failing. When I looked on Travis, I saw this as one of the first errors:

xs/Integration_wrap.2.2.1.c:2045:5: error: ‘gsl_integration_fixed_legendre’ undeclared (first use in this function)
     gsl_integration_fixed_legendre = (gsl_integration_fixed_type *)(argp);
     ^

It may be that GSL upstream changed backward compatibility, I am not sure, things get really hairy if they did.

[djerius]

I've undoubtedly broken things, but since fixing the Travis configuration so testing against older versions worked I've had no time to look at this. I'll find the time to split out the Travis fixes so that they can be applied to the master branch.

[djerius]

This is superseded by PR #158