From a864d407119980ef5cfd4be079b8ec2b8038102b Mon Sep 17 00:00:00 2001
From: Marius Bakke <marius@gnu.org>
Date: Tue, 23 Jun 2020 22:23:56 +0200
Subject: [PATCH] gnu: mpv: Use deterministic ordering of shared library
dependencies.
Fixes <https://bugs.gnu.org/42025>.
Reported by Msavoritias <marinus.savoritias@disroot.org>.
* gnu/packages/video.scm (mpv)[arguments]: Add phase 'build-reproducibly'.
---
gnu/packages/video.scm | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index b206fb32f55..406a2ad5a13 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -1534,6 +1534,14 @@ (define-public mpv
(("\"youtube-dl\",")
(string-append "\"" ytdl "/bin/youtube-dl\",")))
#t)))
+ (add-before 'configure 'build-reproducibly
+ (lambda _
+ ;; Somewhere in the build system library dependencies are enumerated
+ ;; and passed as linker flags, but the order in which they are added
+ ;; varies. See <https://github.com/mpv-player/mpv/issues/7855>.
+ ;; Set PYTHONHASHSEED as a workaround for deterministic results.
+ (setenv "PYTHONHASHSEED" "1")
+ #t))
(add-before
'configure 'setup-waf
(lambda* (#:key inputs #:allow-other-keys)
--
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