From 86889c662cdbf409dc87154b05df9447cb7c1f38 Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Wed, 25 Nov 2020 04:43:22 -0800
Subject: [PATCH] makefile: assure that macOS 11 (XCode 12) can use libpthread

If the Xcode environment provides an particular include file, its
related library file will be available at link and presumably run time
---
 makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/makefile b/makefile
index e567a932..acbc2d01 100644
--- a/makefile
+++ b/makefile
@@ -495,6 +495,12 @@ ifeq (${WIN32},)  #*nix Environments (&& cygwin)
         ifneq (,$(findstring Haiku,$(OSTYPE)))
           OS_CCDEFS += -DUSE_READER_THREAD -DSIM_ASYNCH_IO 
           $(info using libpthread: $(call find_include,pthread))
+        else
+          ifeq (Darwin,$(OSTYPE))
+            OS_CCDEFS += -DUSE_READER_THREAD -DSIM_ASYNCH_IO 
+            OS_LDFLAGS += -lpthread
+            $(info using macOS libpthread: $(call find_include,pthread))
+          endif
         endif
       endif
       LIBEXT = $(LIBEXTSAVE)