export
QUIET?=
SYSROOT?=
KERNEL_VERSION?=$(shell uname -r)
ARCH?=$(shell uname -m | sed -e s/i.86/i386/ -e s/parisc64/parisc/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/)

BUILD_DIR?=build
OBJ_DIR?=$(BUILD_DIR)/obj
S_DIR?=$(BUILD_DIR)/s
CPIO_DIR?=$(BUILD_DIR)/cpio
MODULES_DIR?=$(CPIO_DIR)/modules

LD:=ld
CC:=gcc
AS:=as

CFLAGS?=-Wall -Wextra -std=gnu99 -O3 -march=native -fverbose-asm -S -I./
LDFLAGS?=-O -nostdlib -Bstatic --strip-all
ASFLAGS?=

ifdef QUIET
CFLAGS+= -DQUIET
endif

#*******************************************************************************
#customized your module list (scsi_wait is dealed with)
MODULES?=firmware_class ext4 ahci sd_mod sg
SCSI_WAIT?=1

#milliseconds to wait for more uevents
UEVENTS_TIMEOUT=1

#configure the root device
ROOT=\"sdb3\"
ROOT_FS=\"ext4\"
ROOT_OPTIONS=\"discard\"
SYSINIT=\"/init.sh\"
#*******************************************************************************

ifdef SCSI_WAIT
MODULES+= scsi_wait_scan
CFLAGS+= -DSCSI_WAIT_SCAN
endif

CFLAGS+= -DROOT=$(ROOT) -DROOT_FS=$(ROOT_FS) -DROOT_OPTIONS=$(ROOT_OPTIONS)
CFLAGS+= -DUEVENTS_TIMEOUT=$(UEVENTS_TIMEOUT) -DSYSINIT=$(SYSINIT)