install tbb before install to allow propagation of env variables

.travis.sh

@@ -5,7 +5,7 @@ function install_tbb()
 {
   if [ "$(uname -s)" == "Linux" ]; then
     wget https://github.com/oneapi-src/oneTBB/releases/download/4.4.2/tbb44_20151115oss_lin.tgz -O /tmp/tbb442.tgz
-    tar -C /tmp -xvf /tmp/tbb442.tgz
+    tar -C /tmp -xf /tmp/tbb442.tgz
 
     TBBROOT=/tmp/tbb44_20151115oss
 
@@ -20,7 +20,7 @@ function install_tbb()
 
   elif [ "$(uname -s)" == "Darwin" ]; then
     wget https://github.com/oneapi-src/oneTBB/releases/download/4.4.2/tbb44_20151115oss_osx.tgz -O /tmp/tbb442.tgz
-    tar -C /tmp -xvf /tmp/tbb442.tgz
+    tar -C /tmp -xf /tmp/tbb442.tgz
 
     TBBROOT=/tmp/tbb44_20151115oss
 
@@ -51,8 +51,6 @@ function configure()
     export CXX=g++-$GCC_VERSION
   fi
 
-  install_tbb
-
   # GTSAM_BUILD_WITH_MARCH_NATIVE=OFF: to avoid crashes in builder VMs
   cmake $SOURCE_DIR \
       -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Debug} \
@@ -111,4 +109,7 @@ case $1 in
   -t)
     test
     ;;
+  -tbb)
+    install_tbb
+    ;;
 esac

.travis.yml

@@ -17,8 +17,9 @@ addons:
     - libpython-dev python-numpy
     - libboost-all-dev
 
-# before_install:
-#  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update          ; fi
+before_install:
+  - ./.travis.sh -tbb
+  # - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update; fi
 
 install:
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then HOMEBREW_NO_AUTO_UPDATE=1 brew install ccache  ; fi