Add static build.

.github/travis/before-install.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+if [ "$TRAVIS_OS_NAME" = "linux" ]; then
+	sudo apt-get update -qq
+	sudo apt-get -y install bison \
+			        autotools-dev \
+				libncurses5-dev \
+				libevent-dev \
+				pkg-config \
+				libutempter-dev \
+				build-essential
+fi

.github/travis/build.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+sh autogen.sh || exit 1
+if [ "$BUILD" = "static" ]; then
+	./configure --enable-static || exit 1
+else
+	./configure || exit 1
+fi
+exec make

.travis.yml

@@ -1,16 +1,29 @@
 language: c
 
 os:
-    - linux
-    - osx
+  - linux
+  - osx
 
 compiler:
-    - gcc
-    - clang
+  - gcc
+  - clang
+
+env:
+  - BUILD=
+  - BUILD=static
+
+jobs:
+  exclude:
+    - os: osx
+    - compiler: gcc
+    - env: BUILD=static
+  exclude:
+    - os: osx
+    - compiler: clang
+    - env: BUILD=static
 
 before_install:
-    - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get update -qq; fi
-    - if [ "$TRAVIS_OS_NAME" = "linux" ]; then sudo apt-get -y install bison autotools-dev libncurses5-dev libevent-dev pkg-config libutempter-dev build-essential; fi
+  - sh .github/travis/before-install.sh
 
 script:
-    - ./autogen.sh && ./configure && make
+  - sh .github/travis/build.sh