deps: add cmocka as submodule for unit testing

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "test/lib/cmocka"]
+	path = test/lib/cmocka
+	url = git://git.cryptomilk.org/projects/cmocka.git

.travis.yml

@@ -40,6 +40,7 @@ before_install:
   - pip install --user cpp-coveralls
 
 script:
+  - sh ./build-deps.sh
   - sh ./autogen.sh
   - if [[ "$CC" == "gcc" && "$CODE_COVERAGE" == "ON" ]]; then
       ./configure CFLAGS="-ftest-coverage -fprofile-arcs";

README.md

@@ -88,6 +88,8 @@ MIT. check the LICENSE file
 ### Unix (Autotools)
 
 ```text
+$ sh ./build-deps.sh # run only once (dependencies)
+$
 $ sh autogen.sh
 $ ./configure
 $ make

build-deps.sh

@@ -0,0 +1,30 @@
+#! /bin/sh
+#
+# Copyright (c), Recep Aslantas.
+#
+# MIT License (MIT), http://opensource.org/licenses/MIT
+# Full license can be found in the LICENSE file
+#
+
+# check if deps are pulled
+git submodule update --init --recursive
+
+# fix glibtoolize
+
+cd $(dirname "$0")
+
+if [ "$(uname)" = "Darwin" ]; then
+  libtoolBin=$(which glibtoolize)
+  libtoolBinDir=$(dirname "${libtoolBin}")
+  ln -s $libtoolBin "${libtoolBinDir}/libtoolize"
+fi
+
+# general deps: gcc make autoconf automake libtool cmake
+
+# test - cmocka
+cd ./test/lib/cmocka
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
+make -j8
+cd ../../../../