travis-ci: Cross compile with minGW

also build bundle_zip

.travis.yml

@@ -8,6 +8,8 @@ addons:
   apt:
     packages:
     # packages list: https://github.com/travis-ci/apt-package-whitelist/blob/master/ubuntu-precise
+    - gcc-mingw-w64-i686
+    - dos2unix
     - libsdl1.2-dev
     - libsdl-image1.2-dev
 #    - libsdl2-dev
@@ -19,11 +21,17 @@ sudo: false
 env:
   - 'SDLVERSION=1'
   - 'SDLVERSION=2'
+  - 'CROSS=mingw'
 
 matrix:
   exclude:
+    - os: linux
+      env: CROSS=mingw
+      compiler: clang
     - os: linux
       env: SDLVERSION=2
+    - os: osx
+      env: CROSS=mingw
 
 compiler:
   - gcc
@@ -33,9 +41,12 @@ before_install:
   - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update > /dev/null ; fi'
   - 'if [ "$TRAVIS_OS_NAME" = "osx" ] && [ "$SDLVERSION" = "1" ] ; then brew install sdl sdl_image ; fi'
   - 'if [ "$TRAVIS_OS_NAME" = "osx" ] && [ "$SDLVERSION" = "2" ] ; then brew install sdl2 sdl2_image ; fi'
+  - 'if [ "$CROSS" = "mingw" ] ; then export CC="i686-w64-mingw32-gcc" ; fi'
 
 script:
   - 'cd $TRAVIS_BUILD_DIR'
-  - './configure --prefix-dir=${HOME}'
+  - 'if [ "$CROSS" = "mingw" ] ; then ./configure --prefix-dir=${HOME} --os=MINGW --without-asound --without-oss --without-munt --without-sdl --without-sdl2 --without-pulse ; else ./configure --prefix-dir=${HOME} ; fi'
   - 'make -j3'
-  - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then make bundle_dmg ; else make install ; fi'
+  - 'make bundle_zip'
+  - 'if [ "$TRAVIS_OS_NAME" = "osx" ]; then make bundle_dmg ; fi'
+  - 'if [ "$TRAVIS_OS_NAME" = "linux" ] && [ -z "$CROSS" ] ; then make install ; fi'