build with several compilers

- multiple versions of gcc
 - multiple versions of c++ standard
 - multiple versions of clang
 - os x

.travis.yml

@@ -1,20 +1,125 @@
 # Copyright (c) 2012-2016 Sebastien Rombauts (sebastien.rombauts@gmail.com)
 
-language: cpp
 
-# compilers to add to build matrix
-compiler:
-  - gcc
-  - clang
 
 # request for Ubuntu 14.04 Trusty VM
 sudo: true
 dist: trusty
+language: cpp
+
+cache:
+  apt: true
+
+matrix:
+  include:
+      # gcc default
+    - env: COMPILERXX=g++
+      # clang default
+    - env: COMPILERXX=clang++
+      # clang 3.8
+    - os: linux
+      env:
+        - COMPILERXX=clang++
+        - LLVM_VERSION=3.8.0
+        - LLVM_ARCHIVE_PATH=$HOME/clang+llvm.tar.xz
+        - COMPILER=clang++
+        - CPPFLAGS="-I $HOME/clang-$LLVM_VERSION/include/c++/v1"
+        - CXXFLAGS=-lc++
+        - PATH=$HOME/clang-$LLVM_VERSION/bin:$PATH
+        - LD_LIBRARY_PATH=$HOME/clang-$LLVM_VERSION/lib:$LD_LIBRARY_PATH
+      before_install:
+       - wget http://llvm.org/releases/$LLVM_VERSION/clang+llvm-$LLVM_VERSION-x86_64-linux-gnu-ubuntu-14.04.tar.xz -O $LLVM_ARCHIVE_PATH
+       - mkdir $HOME/clang-$LLVM_VERSION
+       - tar xf $LLVM_ARCHIVE_PATH -C $HOME/clang-$LLVM_VERSION --strip-components 1
+      # gcc 4.9 std=default
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-4.9
+      env: COMPILERXX=g++-4.9
+    # gcc 5 std=c++03
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+      env:
+        - COMPILERXX=g++-5
+        - CXXFLAGS="-std=c++03"
+    # gcc 5 std=c++11
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+      env:
+        - COMPILERXX=g++-5
+        - CXXFLAGS="-std=c++11"
+    # gcc 5 std=c++14
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+      env:
+        - COMPILERXX=g++-5
+        - CXXFLAGS="-std=c++14"
+    # gcc 5 std=c++1z
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+      env:
+        - COMPILERXX=g++-5
+        - CXXFLAGS="-std=c++1z"
+    # gcc 6 std=c++14
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+      env:
+        - COMPILERXX=g++-6
+        - CXXFLAGS="-std=c++14"
+    # gcc 6 std=c++1z
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+      env:
+        - COMPILERXX=g++-6
+        - CXXFLAGS="-std=c++1z"
+    # gcc 6 std=c++14 all warnings, pedantic
+    - addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+      env:
+        - COMPILERXX=g++-6
+        - CXXFLAGS="-std=c++14 -Wall -Wextra -pedantic"
+     # os x
+    - os: osx
+      osx_image: xcode8
+      compiler: clang
+      install:
+       - brew install cmake
+      env:
+       - COMPILER=clang
+       - COMPILERXX=clang
+       - CXXFLAGS=-lstdc++
 
-addons:
-  apt:
-    packages:
-    - cppcheck
 
 before_install:
   - if [[ "$CXX" == "g++" ]]; then pip install --user cpp-coveralls ; fi
@@ -23,6 +128,9 @@ before_install:
 before_script:
   - mkdir build
   - cd build
+  - export CXX=$COMPILERXX
+  - echo CXX is $CXX CXXFLAGS is $CXXFLAGS CPPFLAGS is $CPPFLAGS
+  - $CXX --version
   - cmake -DCMAKE_BUILD_TYPE=Debug -DSQLITECPP_USE_GCOV=ON -DSQLITECPP_BUILD_EXAMPLES=ON -DSQLITECPP_BUILD_TESTS=ON ..
 
 # build examples, and run tests (ie make & make test)