Fix wx cache logic

travis-ci/build_wxwidgets.sh

@@ -1,26 +1,32 @@
 # wxWidgets
-if [ ! -f "$HOME/build/wxWidgets/staticlib/bin/wx-config" ]; then
+if [ -f "$HOME/build/wxWidgets/staticlib/bin/wx-config" ]; then
+    echo "wxWidgets cache found; skipping.."
+    exit 0
+else
+    echo "wxWidgets cache not found; building.."    
+fi
+
 
-echo "wxWidgets cache not found; building."
+echo "Fetch wxWidgets.."
 cd $HOME/build
 mkdir -p $HOME/build/wxWidgets/staticlib
 cd wxWidgets
-wget https://github.com/wxWidgets/wxWidgets/releases/download/v3.1.2/wxWidgets-3.1.2.tar.bz2
+wget https://github.com/wxWidgets/wxWidgets/releases/download/v3.1.2/wxWidgets-3.1.2.tar.bz2 > /dev/null
 
 echo "Unpacking wxWidgets.."
 tar -xvjf wxWidgets-3.1.2.tar.bz2 > /dev/null
 cd wxWidgets-3.1.2/
-./autogen.sh 
+./autogen.sh
 
 if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then 
 ./configure --with-opengl --disable-shared --enable-monolithic --with-libjpeg --with-libtiff --with-libpng --with-zlib --disable-sdltest --enable-unicode --enable-display --enable-propgrid --disable-webkit --disable-webview --disable-webviewwebkit --prefix=`echo $HOME/build/wxWidgets/staticlib` CXXFLAGS="-std=c++0x"
 fi
 
 if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
 ./configure --with-opengl --disable-shared --enable-monolithic --with-libjpeg --with-libtiff --with-libpng --with-zlib --with-mac --disable-sdltest --enable-unicode --enable-display --enable-propgrid --disable-webkit --disable-webview --disable-webviewwebkit --with-macosx-version-min=10.9  --prefix=`echo $HOME/build/wxWidgets/staticlib` CXXFLAGS="-std=c++0x" --with-libiconv=/usr
+fi
 
 echo "Building wxWidgets.."
 make -j2
 make install
 
-fi