updated travis homebrew build script

.travis.yml

@@ -89,12 +89,8 @@ jobs:
       addons:
         homebrew:
           update: true
-          taps: pdf2htmlEX/homebrew-brewTap
-          packages:
-            - pdf2htmlex-new
       script:
-        - pwd
-        - ls
+        - ./buildScripts/travisHomeBrewDoItAll
         - pdf2htmlEX --version
 #    - stage: test
 #      os: 

buildScripts/travisHomeBrewDoItAll

@@ -2,6 +2,10 @@
 
 # This bash script builds everyting on an TravisCI Mac OSx worker
 
+# See:
+# https://docs.travis-ci.com/user/installing-dependencies/#using-homebrew-without-addon-on-older-macos-images
+# For details on obtaining/using the correct ruby version for homebrew.
+
 rvm use 2.6 --install --binary
 brew tap pdf2htmlEX/homebrew-brewTap
 brew update

buildScripts/travisLinuxBrewDoItAll

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# This bash script builds everyting on an TravisCI Mac OSx worker
+
+# See:
+# https://docs.travis-ci.com/user/installing-dependencies/#using-homebrew-without-addon-on-older-macos-images
+# For details on obtaining/using the correct ruby version for homebrew.
+
+sudo apt-get update
+sudo apt-get install gcc-5 # many of the linuxBrew bottles are compiled with gcc-5
+
+brew tap pdf2htmlEX/homebrew-brewTap
+brew update
+brew install pdf2htmlex-new -s --cc=gcc-5