fix slow boost build in travis
boost build is really slow and times out with xcode8
upgrading to a newer xcode fixes the problem
the previous try to split the boost build/upgrade
into a separate step was not enough
@@ -22,17 +22,17 @@ matrix:
python: "2.7"
env: DATABASE=psql_pg8000
- os: osx
- osx_image: xcode8
+ osx_image: xcode9.4
sudo: false
language: generic
env: DATABASE=sqlite
- os: osx
- osx_image: xcode8
+ osx_image: xcode9.4
sudo: false
language: generic
env: DATABASE=psql_psycopg2
- os: osx
- osx_image: xcode8
+ osx_image: xcode9.4
sudo: false
language: generic
env: DATABASE=psql_pg8000
