Add ruby-2.3 testing to Travis

.travis.yml

@@ -98,6 +98,9 @@ matrix:
     - compiler: gcc
       os: linux
       env: SWIGLANG=ruby
+    - compiler: gcc
+      os: linux
+      env: SWIGLANG=ruby VER=2.3
     - compiler: gcc
       os: linux
       env: SWIGLANG=scilab
@@ -162,6 +165,10 @@ matrix:
     - compiler: gcc
       os: linux
       env: SWIGLANG=python SWIG_FEATURES=-O
+    # Not quite working yet
+    - compiler: gcc
+      os: linux
+      env: SWIGLANG=ruby VER=2.3
 before_install:
   - date -u
   - uname -a

Tools/travis-linux-install.sh

@@ -85,6 +85,15 @@ case "$SWIGLANG" in
 	"r")
 		sudo apt-get -qq install r-base
 		;;
+	"ruby")
+		if [[ "$VER" ]]; then
+			sudo apt-get install python-software-properties
+			sudo add-apt-repository -y ppa:brightbox/ruby-ng
+			sudo apt-get -qq update
+			sudo apt-get -qq install ruby2.3 ruby2.3-dev
+			CONFIGOPTS+=("--with-ruby=ruby${VER}");
+		fi
+		;;
 	"scilab")
 		sudo apt-get -qq install scilab
 		;;