Add clang and CyaSSL to the build matrix

We use the travis cache to avoid re-building CyaSSL.

On a cold cache, CyaSSL is downloaded from github into dependencies-src/
and installed into dependencies-installed/. Both directories are added to the
Travis cache.

Author: mhaas

.travis.yml

@@ -1,7 +1,19 @@
+# Use newer, container based infrastructure
+# Does not allow use of apt-get, but enables
+# caching support
+sudo: false
 language: c
 compiler:
   - gcc
+  - clang
 install:
   - ./autogen.sh
 script:
-  - ./configure && make
+  - ./.travis_configure_wrapper.sh && make
+env:
+  - BUILD_TYPE=normal
+  - CYASSL="3.3.2" BUILD_TYPE=cyassl
+cache:
+  directories:
+    - dependencies-src
+    - dependencies-installed

.travis_configure_wrapper.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+if [[ -z "$BUILD_TYPE" ]]; then
+    echo "BUILD_TYPE not set. Bye."
+    exit 1
+fi
+
+if [[ "$BUILD_TYPE" == "normal" ]]; then
+
+    echo "Running Wifidog configure"
+    ./configure $@
+
+elif [[ "$BUILD_TYPE" == "cyassl" ]]; then
+    if [[ -z "$CYASSL" ]]; then
+        echo "CYASSL not set."
+        exit 1
+    fi
+    CUR=`pwd`
+    mkdir -p dependencies-src || true
+    mkdir -p dependencies-installed || true
+    if [[ ! -f dependencies-installed/include/cyassl/ssl.h ]]; then
+        echo "Cached CyaSSL install not found. Installing."
+        cd dependencies-src
+        # Check if travis cache is there
+        if [[ -f cyassl-${CYASSL}/autogen.sh ]]; then
+            echo "Found cached CyaSSL package"
+        else
+            echo "No cache, downloading CyaSSL"
+            wget https://github.com/cyassl/cyassl/archive/v${CYASSL}.tar.gz \
+                -O cyassl-${CYASSL}.tar.gz
+            tar -xzf cyassl-${CYASSL}.tar.gz
+        fi
+        cd cyassl-${CYASSL}
+        echo "Content of cyassl-${CYASSL}:"
+        ls
+        echo "Running CyaSSL autogen.sh"
+        ./autogen.sh
+        echo "Running CyaSSL configure"
+        ./configure --prefix="$CUR"/dependencies-installed/ --enable-ecc
+        # make will pick up the cached object files - real savings
+        # happen here
+        echo "Running CyaSSL make"
+        make
+        echo "Running CyaSSL make install"
+        make install
+        cd "$CUR"
+    else
+        echo "Cached CyaSSL install found."
+    fi
+    echo "Running Wifidog configure"
+    export CFLAGS="-I${CUR}/dependencies-installed/include/"
+    export LDFLAGS="-L${CUR}/dependencies-installed/lib/"
+    ./configure --enable-cyassl $@
+else
+    echo "Unknow BUILD_TYPE $BUILD_TYPE"
+    exit 1
+fi