From 5fa1e246b9ed9fda62c5416e0420f1dcd2dbb254 Mon Sep 17 00:00:00 2001
From: Jun Aruga <junaruga@users.noreply.github.com>
Date: Fri, 29 Sep 2023 18:16:58 +0200
Subject: [PATCH] .travis.yml: Upgrade the used Ubuntu s390x to 22.04 (Jammy).
 (#8401)

Upgrade the used Ubuntu version from 20.04 (Focal) to 22.04 (Jammy), alignin
with RubyCI "s390x (Ubuntu)" server.
https://rubyci.org/

Note Travis CI supports Ubuntu 22.04 (Jammy).
https://docs.travis-ci.com/user/reference/jammy/

Set `DFLTCC=0` environment variable as a workaround to avoid the test failures
related to zlib in the `make test-all` and `make test-spec`. The failures can
happen with the zlib library applying the patch madler/zlib#410 to enable the
deflate algorithm producing a different compressed byte stream.
---
 .travis.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 11ae8a9b45..bfae9130f3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -87,7 +87,13 @@ env:
   - &s390x-linux
     name: s390x-linux
     arch: s390x
+    dist: jammy
     compiler: gcc
+    env:
+      # Avoid possible test failures with the zlib applying the following patch
+      # on s390x CPU architecture.
+      # https://github.com/madler/zlib/pull/410
+      - DFLTCC=0
 
   - &arm32-linux
     name: arm32-linux