ci: use trusty for travis. add gcc

.travis.yml

@@ -1,38 +1,43 @@
-os:
-  - osx
-  - linux
-
+dist: trusty
+#TODO: mingw cross build
 language: cpp
-compiler:
-  - clang
 cache: apt
-env:
-  - QT=4.8.6 AV=ffmpeg-1.0.10
-  - QT=5.0.2 AV=ffmpeg-1.2.10
-  - QT=5.1.1 AV=ffmpeg-2.0.6
-  - QT=5.2.1 AV=ffmpeg-2.2.11
-  - QT=brew AV=ffmpeg-brew
-
 
 matrix:
-  exclude:
-    - os: linux
-      env: QT=brew AV=ffmpeg-brew
-    - os: osx
-      env: QT=4.8.6 AV=ffmpeg-1.0.10
-    - os: osx
-      env: QT=5.0.2 AV=ffmpeg-1.2.10
+  include:
     - os: osx
-      env: QT=5.1.1 AV=ffmpeg-2.0.6
-    - os: osx
-      env: QT=5.2.1 AV=ffmpeg-2.2.11
+      compiler: clang
+      env:
+      - QT=brew
+      - AV=ffmpeg-brew
+    - os: linux
+      compiler: gcc
+      env:
+      - QT=4.8.6
+      - AV=ffmpeg-1.0.10
+      - CC=gcc
+    - os: linux
+      compiler: clang
+      env:
+      - QT=5.0.2
+      - AV=ffmpeg-1.2.10
+    - os: linux
+      compiler: clang
+      env:
+      - QT=5.1.1
+      - AV=ffmpeg-2.0.6
+    - os: linux
+      compiler: clang
+      env:
+      - QT=5.2.1
+      - AV=ffmpeg-2.2.11
 
 branches:
   only:
     - master
     - prelease
     - ci/travis
-    - /^travis-.*$/
+    - /^travis.*$/
     - dev
 
 git:

tools/ci/linux/script.sh

@@ -9,13 +9,13 @@ cat /etc/issue
 echo "QtAV build script for travis-ci"
 
 jobs=`cat /proc/cpuinfo |grep 'cpu cores' |wc -l`
-
-
 cd $QTAV_OUT
 
 rm -f build.log
 type -a moc
-qmake -r $TRAVIS_BUILD_DIR -spec linux-clang "CONFIG+=recheck"
-make -j$jobs
+SPEC=linux-clang
+test -n "$CC" && test "${CC/gcc/}" != "$CC" && SPEC=linux-g++
+qmake -r $TRAVIS_BUILD_DIR -spec $SPEC "CONFIG+=recheck"
+make -j$((jobs+1))
 
 cd $TRAVIS_BUILD_DIR