Travis CI: Also test with musl-gcc (Linux)

(Cherry-pick commit 1659f29 from 'release-7_4' branch.)

diff --git a/.travis.yml b/.travis.yml
index 4ed4eb2..d49662b 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,6 +15,13 @@ matrix:
   - os: linux
     env:
     - MAKEFILE_TARGET=dist
+  - os: linux
+    addons:
+      apt:
+        packages:
+        - musl-tools
+    compiler: musl-gcc
+    dist: trusty
 
 before_install:
 - if [[ "$MAKEFILE_TARGET" == "dist"* ]]; then