Add Windows cross-compiling to Travis CI

[mloskot]

This seems like a feasible route to follow in order to make Travis CI build and test GEOS for Windows:

For minimal Windows support, you may go this route: 
* Install these packages: binutils-mingw-w64-i686 gcc-mingw-w64-i686 g++-mingw-w64-i686 wine 
* CC=i686-w64-mingw32-gcc CXX=i686-w64-mingw32-g++ 
* Link everything static, use the link flags -static-libgcc -static-libstdc++ 
* run tests with wine.

from ​Boost mailing list.

[robe]

interesting. I presume these packages are available already on travis ci?

[mloskot]

Regina,

Each ​Travis CI Environment comes with a bunch of pre-installed packages. If we need anything else, we simple apt-get it, whatever comes with Ubuntu 12.04.

If you want, here is my Travis CI playground: ​https://github.com/mloskot/travis-ci-test

1. Fork it to your GitHub account
2. Go to ​https://travis-ci.org
3. Log in with your GitHub account
4. Go to ​https://travis-ci.org/profile
5. Select your fork of the travis-ci-test repository
6. Flip switch to ON to enable Travis CI for your fork repo
7. Experiment

You can't break anything (if something hangs, it will be killed after 50 minutes timeout).

[robe]

GDAL tests on mingw and MacOSX with travis:

4:13:16	robe2:	EvenR: I see you have GDAL testing on mingw with travis. Is that hard to set up?
14:13:47	robe2:	also macOSx interesting
14:15:17	EvenR:	robe2: not that much : https://github.com/rouault/gdal_coverage/blob/trunk_mingw/.travis.yml and https://github.com/rouault/gdal_coverage/blob/trunk_travis_macosx/.travis.yml
14:15:38	EvenR:	the key for MacOsX is to define language: objective-c which tricks Travis to use a Mac VM

[strk]

Ticket retargeted after milestone closed

[robe]

don't think I'll ever get to this so just closing.