Move Travis builds to the container-based infrastructure.

.travis.yml

@@ -1,8 +1,12 @@
+sudo: false
 language: c
 
+addons:
+  apt:
+    packages:
+      - build-essential
+
 before_install:
-  - sudo apt-get -qq update
-  - sudo apt-get -q install build-essential
   - ./bootstrap
 
 compiler:

Makefile.am

@@ -13,6 +13,9 @@ EXTRA_DIST = bootstrap build-osx build-win32 AUTHORS \
 ACLOCAL_AMFLAGS = -I m4
 AUTOMAKE_OPTIONS = foreign dist-bzip2
 
+# Travis CI uses “make test” instead of “make check”
+test: check
+
 echo-dirs: ; echo src test
 
 FORCE: