Merge #316

316: Patch for breaking 32-bit float conversions on ppc (#313). r=reitermarkus a=Alexhuszagh

Use qemu-3.0.1 for all powerpc architectures, and 4.1.0 for everything else.

Note: @reitermarkus, this requires bash for the scripting language, not shell, which the Dockerfiles currently use. I'm not sure if this is a deal-breaker.

Closes #313.

Co-authored-by: Alex Huszagh <ahuszagh@ahuszagh.localdomain>

docker/qemu.sh

@@ -1,8 +1,19 @@
+#!/usr/bin/env bash
+
 set -ex
 
 main() {
     local version=4.1.0
 
+    # Qemu versions 3.10.0 and above break 32-bit float conversions
+    # on powerpc, powerpc64, and powerpc64le. Last known working version
+    # is 3.0.1.
+    # Upstream Issue:
+    #   https://bugs.launchpad.net/qemu/+bug/1821444
+    if [[ $1 == ppc* ]]; then
+        version=3.0.1
+    fi
+
     local arch=$1 \
           os=$2 \
           softmmu=$3 \