https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=commit;h=a59e902b887fd92337c9728f668cf9c89da3957a

From a59e902b887fd92337c9728f668cf9c89da3957a Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Thu, 20 Jun 2024 12:05:15 +0200
Subject: [PATCH] core: Declare environ for macOS and others.

* src/spawn-posix.c (environ): Declare.
--

GnuPG-bug-id: 7169
---
 src/spawn-posix.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/spawn-posix.c b/src/spawn-posix.c
index 7de02a9..96f1536 100644
--- a/src/spawn-posix.c
+++ b/src/spawn-posix.c
@@ -57,6 +57,9 @@
 
 #include "gpgrt-int.h"
 
+/* (Only glibc's unistd.h declares this iff _GNU_SOURCE is used.)  */
+extern char **environ;
+
 
 /* Definition for the gpgrt_spawn_actions_t.  Note that there is a
  * different one for Windows.  */
-- 
2.30.2