pthread_mutexattr_setkind_np() is long deprecated and should be using
pthread_mutexattr_settype() instead even on Linux. Fixes consumers
when built against glibc-2.34.

https://bugs.gentoo.org/808707
--- a/Sources/Core/System/Unix/mutex_pthread.cpp
+++ b/Sources/Core/System/Unix/mutex_pthread.cpp
@@ -42,3 +42,3 @@
 {
-#ifdef __FreeBSD__
+#if 1
 	int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind);
@@ -65,3 +65,3 @@
 #else
-#ifdef __FreeBSD__
+#if 1
         pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);