Test --use-system-libraries option in Travis CI

Actually, $RUBY_GPGME_USE_SYSTEM_LIBRARIES environment variable is tested, but it is equivalent.
ueno · Mar 21, 2019 · 16a6e5a · 16a6e5a
1 parent c9e924f
commit 16a6e5a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,10 @@ rvm:
   - 2.4.3
   - 2.5.0
 
+env:
+  - RUBY_GPGME_USE_SYSTEM_LIBRARIES=1
+  -
+
 matrix:
   allow_failures:
     - rvm: 1.9.3