More travis improvements:

Output config_info built from b2.
Add more XCode versions to the test matrix.

.travis.yml

@@ -147,6 +147,33 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++11
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++14
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=c++1z
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
 
@@ -295,15 +322,99 @@ matrix:
 
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode8.3
 
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode8.3
 
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode8.3
 
     - os: osx
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode8.3
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode8.2
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode8.2
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode8.2
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode8.1
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode8.1
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode8.1
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode8.1
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode8.1
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode8.0
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode8.0
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode8.0
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode8.0
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode7.3
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode7.3
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode7.3
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode7.3
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03
+      osx_image: xcode6.4
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++11
+      osx_image: xcode6.4
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++14
+      osx_image: xcode6.4
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++1z
+      osx_image: xcode6.4
 
 install:
   - cd ..
@@ -316,12 +427,12 @@ install:
   - python tools/boostdep/depinst/depinst.py config
   - ./bootstrap.sh
   - ./b2 headers
-  - $COMPILER -std=$CXXSTD -I. -O3 libs/config/test/config_info.cpp -o config_info && ./config_info
+ 
-
 script:
   - |-
     echo "using $TOOLSET : : $COMPILER : <cxxflags>-std=$CXXSTD ;" > ~/user-config.jam
-  - ./b2 libs/config/test toolset=$TOOLSET
+  - (cd libs/config/test && ../../../b2 config_info_travis_install msvc && ./config_info_travis)
+  - ./b2 -j3 libs/config/test toolset=$TOOLSET
 
 notifications:
   email:

test/Jamfile.v2

@@ -104,3 +104,7 @@ obj has_clang_implicit_fallthrough : cmd_line_check.cpp :
 
 explicit has_clang_implicit_fallthrough ;
 
+exe config_info_travis : config_info.cpp ;
+install config_info_travis_install : config_info_travis : <location>. ;
+explicit config_info_travis_install ;
+explicit config_info_travis ;