Libcheck path detection for unit tests in darwin

Author: danielinux

Makefile

@@ -15,6 +15,11 @@ ifneq ($(WOLFSSL_PREFIX),)
 CFLAGS+=-I$(WOLFSSL_PREFIX)/include
 LDFLAGS+=-L$(WOLFSSL_PREFIX)/lib
 endif
+CHECK_PREFIX?=$(shell brew --prefix check 2>/dev/null)
+ifneq ($(CHECK_PREFIX),)
+UNIT_CFLAGS+=-I$(CHECK_PREFIX)/include
+UNIT_LDFLAGS+=-L$(CHECK_PREFIX)/lib
+endif
 endif
 TAP_SRC:=src/port/posix/tap_$(UNAME_LC).c
 ifeq ($(wildcard $(TAP_SRC)),)
@@ -197,9 +202,9 @@ unit: build/test/unit
 build/test/unit:
 	@mkdir -p build/test/
 	@echo "[CC] unit.c"
-	@$(CC) $(CFLAGS) -c src/test/unit/unit.c -o build/test/unit.o
+	@$(CC) $(CFLAGS) $(UNIT_CFLAGS) -c src/test/unit/unit.c -o build/test/unit.o
 	@echo "[LD] $@"
-	@$(CC) -o build/test/unit build/test/unit.o $(LDFLAGS)
+	@$(CC) $(UNIT_LDFLAGS) $(LDFLAGS) build/test/unit.o -o build/test/unit
 
 # Install dynamic library to re-link linux applications
 #