Add travis support for Linux:

- Installing requirements with install script
- Add missing include(checkIncludeFile) cmake command
- Configuration matrix to compile the project with different options

.travis.yml

@@ -1,40 +1,20 @@
 language: cpp
 
-sudo: false
-
-addons:
-    apt:
-      packages:
-        - cmake
-        - zlib1g-dev
-        - libssh-dev
-        - libssh
-        - libcurl4-openssl-dev
-        - gettext
-      sources:
-        - kalakris-cmake
+sudo: required
+dist: trusty
 
 compiler:
   - gcc
   - clang
 
-before_install:
-  - echo $LANG
-  - echo $LC_ALL
-  - if [ $TRAVIS_OS_NAME == osx ]; then brew update && brew install libssh curl; fi
-  - rvm use $RVM --install --binary --fuzzy
-  - gem update --system
-#  - gem --version
-
-script:
-  - cmake -DCMAKE_INSTALL_PREFIX=..\dist -EXIV2_ENABLE_NLS=ON -DEXIV2_ENABLE_CURL=OFF -DEXIV2_ENABLE_SSH=OFF .
-  - cmake --build . && cmake --build . --target install 
-  - cmake -DCMAKE_INSTALL_PREFIX=..\dist2 -EXIV2_ENABLE_NLS=ON -DEXIV2_ENABLE_CURL=ON -DEXIV2_ENABLE_SSH=ON -DEXIV2_ENABLE_WEBREADY=ON .
-  - cmake --build . && cmake --build . --target install 
-
-notifications:
-  email: false
+env:
+  - CMAKE_OPTIONS="" # Default 
+  - CMAKE_OPTIONS="-DEXIV2_ENABLE_VIDEO=ON -DEXIV2_ENABLE_WEBREADY=ON" # All enabled
+  - CMAKE_OPTIONS="-DEXIV2_ENABLE_XMP=OFF -DEXIV2_ENABLE_NLS=OFF -DEXIV2_ENABLE_LENSDATA=OFF" # All disabled
+  - CMAKE_OPTIONS="-DEXIV2_ENABLE_WEBREADY=ON -DEXIV2_ENABLE_CURL=OFF -DEXIV2_ENABLE_SSH=OFF" # WebReady without SSH nor CURL
     
 os:
   - linux
-  - osx
+
+install: ./.travis/install.sh
+script:  ./.travis/run.sh

.travis/install.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+set -x
+
+if [[ "$(uname -s)" == 'Linux' ]]; then
+    sudo apt-get install cmake zlib1g-dev libssh-dev libcurl4-openssl-dev gettext libexpat1-dev
+fi
+

.travis/run.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -e
+set -x
+
+mkdir build && cd build
+cmake ${CMAKE_OPTIONS} ..
+make -j

config/generateConfigFile.cmake

@@ -1,3 +1,5 @@
+include(CheckIncludeFile)
+
 # Note that the scope of the EXV_ variables in local
 if (${EXIV2_ENABLE_WEBREADY})
     set(EXV_USE_SSH   ${EXIV2_ENABLE_SSH})