From 4744c3fa4124388da9e07d1378e501c461a5e83e Mon Sep 17 00:00:00 2001
From: Eli Schwartz <eschwartz@archlinux.org>
Date: Wed, 24 Jul 2019 18:30:27 -0400
Subject: [PATCH] work around broken travis environment variables

See: https://github.com/travis-ci/travis-ci/issues/5301
---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index c5ed9bd5c..29fd54377 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,6 +30,8 @@ before_script:
     - travis_retry sudo gem install asciidoctor
     - travis_retry sudo -H pip install --ignore-installed msgcheck pylint
     - phpenv local system
+      # work around broken travis environment variables, see https://github.com/travis-ci/travis-ci/issues/5301
+    - unset PYTHON_CFLAGS
 
 script:
     - ./tools/build-test.sh