Update .travis.yml

.travis.yml

@@ -1,6 +1,8 @@
 # Sample .travis.yml for R projects
 
 language: r
+r:
+ - data.table
 warnings_are_errors: true
 sudo: required
 dist: precise
@@ -9,7 +11,11 @@ env:
  global:
  - NOT_CRAN = true
 before_install: 
- echo "options(repos = c(CRAN='https://cran.rstudio.com'))" > ~/.Rprofile
+ - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install llvm &&
+ export PATH="/usr/local/opt/llvm/bin:$PATH" &&
+ export LDFLAGS="-L/usr/local/opt/llvm/lib" &&
+ export CFLAGS="-I/usr/local/opt/llvm/include"; fi
+# echo "options(repos = c(CRAN='https://cran.rstudio.com'))" > ~/.Rprofile
 # - sudo apt-get autoclean
 # - sudo aptitude install libgdal-dev
 apt_packages: