From 8bf4e7c25e63254ee4c2a6a9e8d2bb8ada422bdd Mon Sep 17 00:00:00 2001
From: "K.C. Budd" <phreakmonkey@gmail.com>
Date: Tue, 14 Nov 2023 08:22:27 -0800
Subject: [PATCH] Fix pthreads on older gcc

---
 tools/mfkey/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/mfkey/Makefile b/tools/mfkey/Makefile
index 113cd753dc..d5b14f1a32 100644
--- a/tools/mfkey/Makefile
+++ b/tools/mfkey/Makefile
@@ -9,6 +9,11 @@ INSTALLTOOLS = $(BINS)
 
 include ../../Makefile.host
 
+# nested_util.c needs pthread support.  Older glibc needs it externally
+ifneq ($(SKIPPTHREAD),1)
+    MYLDLIBS += -lpthread
+endif
+
 # checking platform can be done only after Makefile.host
 ifneq (,$(findstring MINGW,$(platform)))
     # Mingw uses by default Microsoft printf, we want the GNU printf (e.g. for %z)