From c30d675e38ba7f9d586bbcafa9a25e50b69cf523 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Thu, 13 Aug 2020 13:02:59 -0700
Subject: [PATCH] Fix for building on Mac. Added README.md.

---
 tools/unit-tests/Makefile  |  8 +++++++-
 tools/unit-tests/README.md | 22 ++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 tools/unit-tests/README.md

diff --git a/tools/unit-tests/Makefile b/tools/unit-tests/Makefile
index 405e53c6..74fcc985 100644
--- a/tools/unit-tests/Makefile
+++ b/tools/unit-tests/Makefile
@@ -1,4 +1,10 @@
-LDFLAGS=-lcheck -lm -pthread -lrt -lsubunit
+LDFLAGS=-lcheck -lm -pthread
+
+UNAME_S := $(shell uname -s)
+ifneq ($(UNAME_S),Darwin)
+	LDFLAGS+=-lrt -lsubunit
+endif
+
 CFLAGS=-I../../src -I../../include
 
 all: unit-parser
diff --git a/tools/unit-tests/README.md b/tools/unit-tests/README.md
new file mode 100644
index 00000000..6578e0b1
--- /dev/null
+++ b/tools/unit-tests/README.md
@@ -0,0 +1,22 @@
+# Unit Test Tools
+
+This uses the "check" unit test framework for C.
+
+You may need to run "apt install check", "yum install check" or "brew install check".
+
+## Building
+
+Use `make` to build.
+
+## Expected output
+
+```sh
+$ ./unit-parser
+Running suite(s): wolfBoot
+Explicit end of options reached
+This field is too large (bigger than the space available in the current header)
+This field is too large and would overflow the image header
+Illegal address (too high)
+Illegal address (too high)
+100%: Checks: 2, Failures: 0, Errors: 0
+```