DEBUGFLAGS = -Wall -Wno-missing-braces -Wno-array-bounds -ffunction-sections -fdata-sections
CFLAGS = $(OPTIMFLAGS) -g -fshort-wchar -fno-stack-protector $(DEBUGFLAGS) -c -include AutoGen.h -DHOST_EFI_EDK2
-prefix = /usr/bin/
-CC = $(prefix)gcc
-AS = $(prefix)as
-LD = $(prefix)ld
-AR = $(prefix)ar
-RANLIB = $(prefix)ranlib
-OBJCOPY = $(prefix)objcopy
-GENFW = $(EDK2BASE)/BaseTools/Source/C/bin/GenFw
+prefix ?= /usr/bin/
+CC ?= $(prefix)gcc
+AS ?= $(prefix)as
+LD ?= $(prefix)ld
+AR ?= $(prefix)ar
+RANLIB ?= $(prefix)ranlib
+OBJCOPY ?= $(prefix)objcopy
+GENFW ?= $(EDK2BASE)/BaseTools/Source/C/bin/GenFw
LDSCRIPT = $(EDK2BASE)/BaseTools/Scripts/gcc4.4-ld-script