package/ci: forgot to test building of GlutApplication.

It's about to be deprecated/removed, but it should still work.

package/ci/travis-desktop.sh

@@ -22,6 +22,7 @@ cmake .. \
     -DCMAKE_BUILD_TYPE=Debug \
     -DWITH_AUDIO=ON \
     -DWITH_GLFWAPPLICATION=ON \
+    -DWITH_GLUTAPPLICATION=$WITH_GLUTAPPLICATION \
     -DWITH_SDL2APPLICATION=ON \
     -DWITH_WINDOWLESS${PLATFORM_GL_API}APPLICATION=ON \
     -DWITH_${PLATFORM_GL_API}CONTEXT=ON \

package/ci/travis.yml

@@ -5,6 +5,7 @@ addons:
     packages:
     - g++-4.7
     - libsdl2-dev
+    - freeglut3-dev
     - libopenal-dev
     # GLFW dependencies, libxi-dev will be needed in the future
     - libxrandr-dev
@@ -148,6 +149,8 @@ install:
 
 - if [ "$TRAVIS_OS_NAME" == "linux" ] && [ ! "$TARGET" == "desktop-sanitizers" ]; then export CXX=g++-4.7; fi
 - if [ "$TRAVIS_OS_NAME" == "linux" ] && [ "$TARGET" == "desktop-sanitizers" ]; then export CXX=clang++-3.8; fi
+- if [ "$TRAVIS_OS_NAME" == "linux" ] && [ "$TARGET" == "desktop" ]; then export WITH_GLUTAPPLICATION=ON; fi
+- if [ "$WITH_GLUTAPPLICATION" != "ON" ]; then export WITH_GLUTAPPLICATION=OFF; fi
 - if [ "$BUILD_DEPRECATED" != "OFF" ]; then export BUILD_DEPRECATED=ON; fi
 - if [ "$TRAVIS_OS_NAME" == "linux" ]; then export PLATFORM_GL_API=GLX; fi
 - if [ "$TRAVIS_OS_NAME" == "linux" ] && [ "$TARGET" == "android" ]; then wget -nc http://dl.google.com/android/ndk/android-ndk-r10e-linux-x86_64.bin && chmod +x android-*.bin && ./android-*.bin -y | grep -v Extracting; fi