package-nopast/base/musl/0001-restore-h_errno-ABI-compatibility-with-ancient-binar.patch

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From cf27184d00c1588eccac71a3bc89c9798e60bbd9 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 30 Aug 2020 21:30:37 -0400
Subject: [PATCH] restore h_errno ABI compatibility with ancient binaries

prior to commit e68c51ac46a9f273927aef8dcebc89912ab19ece, h_errno was
actually an external data object not a macro. bring back the symbol,
and use it as the storage for the main thread's h_errno.

technically this still doesn't provide full compatibility if the
application was multithreaded, but at the time there were no res_*
functions (and they did not set h_errno anyway), so any use of h_errno
would have been via thread-unsafe functions. thus a solution that just
fixes single-threaded applications seems acceptable.
---
 src/network/h_errno.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/network/h_errno.c b/src/network/h_errno.c
index 8677a92b..638f7718 100644
--- a/src/network/h_errno.c
+++ b/src/network/h_errno.c
@@ -1,7 +1,11 @@
 #include <netdb.h>
 #include "pthread_impl.h"
 
+#undef h_errno
+int h_errno;
+
 int *__h_errno_location(void)
 {
+	if (!__pthread_self()->stack) return &h_errno;
 	return &__pthread_self()->h_errno_val;
 }
-- 
2.28.0