Update TravisCI to use reproducible settings

Author: zbeekman

.travis.yml

@@ -5,6 +5,9 @@ os: osx
 
 env:
   global:
+    - ZERO_AR_DATE=1
+    - TZ=UTC
+    - LC_ALL=C
     - CACHE="${HOME}/.local"
     - MPICH_VER="3.2.1"
     - MPICH_URL_HEAD="https://www.mpich.org/static/downloads/${MPICH_VER}"
@@ -102,6 +105,8 @@ install:
 
 script:
   - pwd
+  - export SOURCE_DATE_EPOCH=$(git show -s --format=%ct $TRAVIS_COMMIT)
+  - echo "SOURCE_DATE_EPOCH = ${COURCE_DATE_EPOCH}"
   - ./developer-scripts/travis/test-script.${BUILD_TYPE:-cmake}.sh
 
 after_script:

developer-scripts/travis/test-script.cmake.sh

@@ -68,6 +68,8 @@ for version in ${GCC}; do
 		ctest "${CTEST_FLAGS[@]}"
 	    fi
 	    make install
+	    make hash_installed
+	    make install
 	    make uninstall
 	)
     done