Bug#1118961: gtk4: Please set DRAW_USE_LLVM=0 for softpipe architectures

[John Paul Adrian Glaubitz]

Source: gtk4
Version: 4.20.2+ds-1
Severity: normal
Tags: patch
User: debian-sparc at lists.debian.org
Usertags: sparc64
X-Debbugs-Cc: debian-sparc at lists.debian.org

Hello,

while investigating #1118780 [1], I researched why LLVM was still invoked
during the tests with GALLIUM_DRIVER=softpipe. Reading thedocumentation [2],
I noticed there is the option DRAW_USE_LLVM=0 and gave it a try:

--- debian/rules.orig   2025-10-14 03:51:42.000000000 +0200
+++ debian/rules        2025-10-25 22:13:13.930249247 +0200
@@ -282,6 +282,7 @@
 ifneq ($(filter mips% powerpc sparc%,$(DEB_HOST_ARCH_CPU)),)
 $(info Disabling use of llvmpipe on this CPU)
 export GALLIUM_DRIVER=softpipe
+export DRAW_USE_LLVM=0
 # https://bugs.debian.org/1077178
 ignore_reftests += label-shadows
 # These succeed with llvmpipe, but fail with softpipe

And voila, this massively reduced the number of failures on sparc64:

Ok:                723
Fail:              4
Skipped:           28

Could you therefore apply this patch?

Thanks,
Adrian

> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1118780
> [2] https://docs.mesa3d.org/envvars.html

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--- debian/rules.orig	2025-10-14 03:51:42.000000000 +0200
+++ debian/rules	2025-10-25 22:13:13.930249247 +0200
@@ -282,6 +282,7 @@
 ifneq ($(filter mips% powerpc sparc%,$(DEB_HOST_ARCH_CPU)),)
 $(info Disabling use of llvmpipe on this CPU)
 export GALLIUM_DRIVER=softpipe
+export DRAW_USE_LLVM=0
 # https://bugs.debian.org/1077178
 ignore_reftests += label-shadows
 # These succeed with llvmpipe, but fail with softpipe