Travis: build on OS X too

.travis.yml

@@ -1,12 +1,19 @@
+os:
+    - linux
+    - osx
+
 language: c
 
 env:
     global:
         secure: "YKG77M7zMvJ+IeV2ziw//HcHqMqFoAzIZlE99Yw/aOn5pvMYKq6Ep7EFVhbfDu9yN0T7M5csCGQeH7/ylDlsZSRMUw72844ezMDM8e10T/lW/T/OYN7j1ZVHh3WSJgS+1D9VG6/Y0OY1Si3lb7PcOdAIU0fPJV5xQONN2+hpJeI="
 
 before_install:
-    - sudo apt-get update -qq
-    - sudo apt-get install -qq bison comerr-dev flex libcap-ng-dev libdb-dev libedit-dev libjson-perl libldap2-dev libncurses5-dev libperl4-corelibs-perl libsqlite3-dev pkg-config python ss-dev texinfo unzip netbase
+    - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get update -qq; fi
+    - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get install -qq bison comerr-dev flex libcap-ng-dev libdb-dev libedit-dev libjson-perl libldap2-dev libncurses5-dev libperl4-corelibs-perl libsqlite3-dev pkg-config python ss-dev texinfo unzip netbase; fi
+    - if [ $TRAVIS_OS_NAME = osx ]; then brew update; fi
+    - if [ $TRAVIS_OS_NAME = osx ]; then brew install cpanm bison flex berkeley-db openssl; fi
+    - if [ $TRAVIS_OS_NAME = osx ]; then sudo cpanm install JSON; fi
     - mkdir ci-build
     - mkdir coverity-build
     - ./autogen.sh