[jira] [Created] (ARROW-3659) Clang Travis build (matrix entry 2) might not actually be using clang

["Philipp Moritz (JIRA)" <ji...@apache.org>]

Philipp Moritz created ARROW-3659:
-------------------------------------

             Summary: Clang Travis build (matrix entry 2) might not actually be using clang
                 Key: ARROW-3659
                 URL: https://issues.apache.org/jira/browse/ARROW-3659
             Project: Apache Arrow
          Issue Type: Improvement
            Reporter: Philipp Moritz


See for example [https://travis-ci.org/apache/arrow/jobs/448267169:]
{code:java}
Setting environment variables from .travis.yml
$ export ANACONDA_TOKEN=[secure]
$ export ARROW_TRAVIS_USE_TOOLCHAIN=1
$ export ARROW_TRAVIS_VALGRIND=1
$ export ARROW_TRAVIS_PLASMA=1
$ export ARROW_TRAVIS_ORC=1
$ export ARROW_TRAVIS_COVERAGE=1
$ export ARROW_TRAVIS_PARQUET=1
$ export ARROW_TRAVIS_PYTHON_DOCS=1
$ export ARROW_BUILD_WARNING_LEVEL=CHECKIN
$ export ARROW_TRAVIS_PYTHON_JVM=1
$ export ARROW_TRAVIS_JAVA_BUILD_ONLY=1
$ export CC="clang-6.0"
$ export CXX="clang++-6.0"
$ export TRAVIS_COMPILER=gcc
$ export CXX=g++
$ export CC=gcc
$ export PATH=/usr/lib/ccache:$PATH
cache.1
Setting up build cache{code}
The CC and CXX command line variables are overwritten by travis (because the travis toolchain is set to gcc).



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