Update makefile for implementation of version on mac.
OS=macOS
CC=gcc
CFLAGS=-fPIC -shared -g -Wall -Wno-nonnull -D__MACOS__
+SCOPE_VER:="$(shell git --no-pager describe --abbrev=12 --dirty=+ --always --tags)"
+CFLAGS+=-DSCOPE_VER=\"$(SCOPE_VER)\"
TEST_CFLAGS=-g -Wall -Wno-nonnull -O0 -coverage
+TEST_CFLAGS+=-DSCOPE_VER=\"$(SCOPE_VER)\"
LD_FLAGS=-Wl, -ldl -lpthread
INCLUDES=-I./contrib/libyaml/include
YAML_AR=contrib/libyaml/src/.libs/libyaml.a
