From: Stefano Rivera <stefanor@debian.org>
Date: Wed, 15 Jan 2020 09:56:01 +0000
Subject: That's the oldest version that Debian targets.

Forwarded: not-needed
---
 rpython/translator/platform/arch/s390x.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/rpython/translator/platform/arch/s390x.py b/rpython/translator/platform/arch/s390x.py
index 3b3e4d1..288c9c4 100644
--- a/rpython/translator/platform/arch/s390x.py
+++ b/rpython/translator/platform/arch/s390x.py
@@ -107,6 +107,7 @@ def update_cflags(cflags):
         if revision == 'z13':
             # gcc does not recognize z13 as a compiler flag!
             revision = 'zEC12'
+        revision = 'z10'
 
         assert revision != 'unknown'
         cflags += ('-march='+revision,)
