Merge branch 'travis-test-two' of https://github.com/avoid3d/cleanflight into avoid3d-travis-test-two

Conflicts:
	src/test/Makefile

.travis.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# A hacky way of running the unit tests at the same time as the normal builds.
+if [ $RUNTESTS ] ; then
+	cd ./src/test && make test
+else
+	make -j2
+fi

.travis.yml

@@ -1,4 +1,5 @@
 env:
+  - RUNTESTS=True
   - TARGET=CC3D
   - TARGET=CC3D OPBL=yes
   - TARGET=CHEBUZZF3
@@ -12,14 +13,15 @@ env:
   - TARGET=SPARKY
   - TARGET=STM32F3DISCOVERY
   - TARGET=ALIENWIIF1
-language: c
-compiler: arm-none-eabi-gcc
+# We use cpp for unit tests, and c for the main project.
+language: cpp
+compiler: clang
 before_install: sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded && sudo apt-get update
 install: sudo apt-get install build-essential gcc-arm-none-eabi git
-before_script: $CC --version
-script: make -j2
+before_script: arm-none-eabi-gcc --version
+script: ./.travis.sh
 
 notifications:
   irc: "chat.freenode.net#cleanflight"
   use_notice: true
-  skip_join: true
+  skip_join: true

src/test/Makefile

@@ -318,4 +318,8 @@ ws2811_unittest : \
 
 	$(CXX) $(CXX_FLAGS) -lpthread $^ -o $(OBJECT_DIR)/$@
 
+test: $(TESTS)
+	set -e && for test in $(TESTS) ; do \
+		$(OBJECT_DIR)/$$test; \
+	done