--- qclib-1.2.0/Makefile	2016-11-30 09:23:28.946521117 -0500
+++ qclib-1.2.0/Makefile.old	2016-11-30 09:36:59.556521117 -0500
@@ -6,7 +6,7 @@
 #     bugfix: Bugfixes only
 VERM    = 1
 VERSION = $(VERM).2.0
-CFLAGS  = -g -Wall -O2
+CFLAGS ?= -g -Wall -O2
 CFILES  = query_capacity.c query_capacity_data.c query_capacity_sysinfo.c query_capacity_ocf.c \
           query_capacity_hypfs.c query_capacity_sthyi.c
 OBJECTS = $(patsubst %.c,%.o,$(CFILES))