Index: .travis.yml
===================================================================
diff -u -r66f716d011d87f3328752a1ec0256c86d0ff13d7 -r31aa36660e5d6c178737bf6cf4be2dc2368aedac
--- .travis.yml	(.../.travis.yml)	(revision 66f716d011d87f3328752a1ec0256c86d0ff13d7)
+++ .travis.yml	(.../.travis.yml)	(revision 31aa36660e5d6c178737bf6cf4be2dc2368aedac)
@@ -18,10 +18,146 @@
   - KITS=$HOME/kits
 matrix:
   include:
+   # ----------------------------
     - os: linux
       dist: xenial
       compiler: clang
       env:
+        - TCLTAG=core-8-branch
+    - os: linux
+      dist: xenial
+      compiler: gcc-7
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-7
+      env:
+        - TCLTAG=core-8-branch
+    - os: osx
+      osx_image: xcode10.2
+      compiler: clang
+      env:
+        - TCLTAG=core-8-branch
+    - os: osx
+      osx_image: xcode10.2	
+      compiler: gcc-8
+      env:
+       - TCLTAG=core-8-branch
+     # ----------------------------
+    - os: linux
+      dist: xenial
+      compiler: clang
+      env:
+        - TCLTAG=core-8-7-a1
+    - os: linux
+      dist: xenial
+      compiler: gcc-7
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-7
+      env:
+        - TCLTAG=core-8-7-a1
+    - os: osx
+      osx_image: xcode10.2
+      compiler: clang
+      env:
+        - TCLTAG=core-8-7-a1
+    - os: osx
+      osx_image: xcode10.2	
+      compiler: gcc-8
+      env:
+       - TCLTAG=core-8-7-a1
+    # ----------------------------
+    - os: linux
+      dist: xenial
+      compiler: clang
+      env:
+        - TCLTAG=core-8-5-19
+    - os: linux
+      dist: xenial
+      compiler: gcc-7
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-7
+      env:
+        - TCLTAG=core-8-5-19
+    - os: osx
+      osx_image: xcode10.2
+      compiler: clang
+      env:
+        - TCLTAG=core-8-5-19
+    - os: osx
+      osx_image: xcode10.2	
+      compiler: gcc-8
+      env:
+       -  TCLTAG=core-8-5-19
+   # ----------------------------
+    - os: linux
+      dist: xenial
+      compiler: clang
+      env:
+        - TCLTAG=core-8-5-branch
+    - os: linux
+      dist: xenial
+      compiler: gcc-7
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-7
+      env:
+        - TCLTAG=core-8-5-branch
+    - os: osx
+      osx_image: xcode10.2
+      compiler: clang
+      env:
+        - TCLTAG=core-8-5-branch
+    - os: osx
+      osx_image: xcode10.2	
+      compiler: gcc-8
+      env:
+        - TCLTAG=core-8-5-branch
+  # ----------------------------
+    - os: linux
+      dist: xenial
+      compiler: clang
+      env:
+        - TCLTAG=core-8-6-9
+    - os: linux
+      dist: xenial
+      compiler: gcc-7
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-7
+      env:
+        - TCLTAG=core-8-6-9
+    - os: osx
+      osx_image: xcode10.2
+      compiler: clang
+      env:
+        - TCLTAG=core-8-6-9
+    - os: osx
+      osx_image: xcode10.2	
+      compiler: gcc-8
+      env:
+        - TCLTAG=core-8-6-9
+  # ----------------------------
+    - os: linux
+      dist: xenial
+      compiler: clang
+      env:
         - TCLTAG=core-8-6-branch
     - os: linux
       dist: xenial
@@ -53,7 +189,6 @@
   directories:
   - "$KITS"
 before_install:
-- if [ $TRAVIS_OS_NAME = osx ]; then brew install gcc; fi
 - openssl aes-256-cbc -K $encrypted_8d1065ce6623_key -iv $encrypted_8d1065ce6623_iv -in deploy_key.enc -out ./deploy_key -d
 - chmod 600 ./deploy_key
 - if echo "$TRAVIS_COMMIT_MESSAGE" | grep -F -q "[skip travis]" ; then echo "[skip