0001-Avoid-setting-PTHREAD_PRIO_INHERIT-on-Alpine-since-t.patch

From 7ea76f5bead1d7c8f80e09232351f243e9ab981d Mon Sep 17 00:00:00 2001
From: Rickard Lyrenius <rly@combination.se>
Date: Fri, 5 Jun 2020 00:05:32 +0200
Subject: Avoid setting PTHREAD_PRIO_INHERIT on Alpine, since this causes
 deadlocks

---
 configure.ac               | 5 +++++
 mono/utils/mono-os-mutex.h | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 6eb961f9dda..ad29946527f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -320,6 +320,11 @@ case "$host" in
                 	# available during cross-compilation
                 	mono_cv_uscore=no
                 fi
+                case "$host" in
+                *-musl)
+                        AC_DEFINE(MUSL, 1, [musl libc])
+                        ;;
+                esac
 		case "$host" in
 		*-tizen-linux-*)
 			platform_tizen=yes
diff --git a/mono/utils/mono-os-mutex.h b/mono/utils/mono-os-mutex.h
index 8b2f530f108..904974b0a08 100644
--- a/mono/utils/mono-os-mutex.h
+++ b/mono/utils/mono-os-mutex.h
@@ -59,7 +59,7 @@ mono_os_mutex_init_type (mono_mutex_t *mutex, int type)
 	if (G_UNLIKELY (res != 0))
 		g_error ("%s: pthread_mutexattr_settype failed with \"%s\" (%d)", __func__, g_strerror (res), res);
 
-#if !defined(__HAIKU__) && defined (PTHREAD_PRIO_INHERIT) && HAVE_DECL_PTHREAD_MUTEXATTR_SETPROTOCOL
+#if !defined(__HAIKU__) && !defined(MUSL) && defined (PTHREAD_PRIO_INHERIT) && HAVE_DECL_PTHREAD_MUTEXATTR_SETPROTOCOL
 	/* use PTHREAD_PRIO_INHERIT if possible */
 	res = pthread_mutexattr_setprotocol (&attr, PTHREAD_PRIO_INHERIT);
 	if (G_UNLIKELY (res != 0 && res != ENOTSUP))
-- 
2.27.0