--- src/Makefile.orig	2016-06-27 06:54:00 UTC
+++ src/Makefile
@@ -62,11 +62,19 @@ PREFIX ?= /usr/local
 LIBDIRNAME ?= /lib/faketime
 PLATFORM ?=$(shell uname)
 
-CFLAGS += -std=gnu99 -Wall -Wextra -Werror -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS -fPIC -DPREFIX='"'$(PREFIX)'"' -DLIBDIRNAME='"'$(LIBDIRNAME)'"'
+# Honour/Respect User *FLAGS
+# User variables come LAST. Do NOT append to them.
+
+WARNS ?= -Wall -Wextra -Werror
+FEATS ?= -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS
+FLAGS ?= -std=gnu99 -fPIC $(WARNS) $(FEATS) -DPREFIX='"'$(PREFIX)'"' -DLIBDIRNAME='"'$(LIBDIRNAME)'"'
+
 ifeq ($(PLATFORM),SunOS)
-CFLAGS += -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
+FLAGS += -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
 endif
 
+CFLAGS := $(FLAGS) $(CFLAGS)
+
 LIB_LDFLAGS += -shared
 
 LDFLAGS += -lpthread
@@ -74,7 +82,7 @@ ifneq ($(PLATFORM),SunOS)
 LDFLAGS += -Wl,--version-script=libfaketime.map
 endif
 
-LDADD += -ldl -lm -lrt
+LDADD += -lm -lrt
 BIN_LDFLAGS += -lrt
 
 SRC = libfaketime.c