Re: Incompatible CFLAGS for kernel module

[Shaz <shazalive@gmail.com>]

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On Sat, Jul 5, 2008 at 1:32 AM, Sam Ravnborg <sam@ravnborg.org> wrote:
> On Fri, Jul 04, 2008 at 10:34:56PM +0500, Shaz wrote:
>> Hi,
>>
>> I am porting tpm emulator to versatilepb, which is an arm platform. I
>> have some problem with CFLAGS from /arch/arm/Makefile when building
>> the kernel module for this software. I cannot figure out what to do in
>> this case. Following is the error:
>>
>> [root@develbox tpm_emulator-0.5]# make
>> Making all in tpmd
>> make[1]: Entering directory `/embedded/tpm_emulator-0.5/tpmd'
>> make[1]: Nothing to be done for `all'.
>> make[1]: Leaving directory `/embedded/tpm_emulator-0.5/tpmd'
>> Making all in tpmd_dev
>> make[1]: Entering directory `/embedded/tpm_emulator-0.5/tpmd_dev'
>>   CC [M]  /embedded/tpm_emulator-0.5/tpmd_dev/tpmd_dev.o
>> cc1: error: unrecognized command line option "-mlittle-endian"
>> cc1: error: unrecognized command line option "-mapcs"
>> cc1: error: unrecognized command line option "-mno-sched-prolog"
>> cc1: error: unrecognized command line option "-mabi=aapcs-linux"
>> cc1: error: unrecognized command line option "-mno-thumb-interwork"
>> /embedded/tpm_emulator-0.5/tpmd_dev/tpmd_dev.c:1: error: bad value
>> (armv4t) for -march= switch
>> /embedded/tpm_emulator-0.5/tpmd_dev/tpmd_dev.c:1: error: bad value
>> (arm9tdmi) for -mtune= switch
>> make[3]: *** [/embedded/tpm_emulator-0.5/tpmd_dev/tpmd_dev.o] Error 1
>> make[2]: *** [_module_/embedded/tpm_emulator-0.5/tpmd_dev] Error 2
>> make[1]: *** [all] Error 2
>> make[1]: Leaving directory `/embedded/tpm_emulator-0.5/tpmd_dev'
>> make: *** [all-recursive] Error 255
>>
>> kindly help me understand the core issue here and point out some solutions.
>
> A quick guess is that you use your host gcc and not your target gcc.
> You most likely have to set CROSS_COMPILE=...
>
> Try with "make V=1" to see the exact gcc command line.
>
> If you continue to rn into trouble please post your Makefile.
I tried make V=1 but the loads of info was given for the things that
went right but nothing noticeable where the error is.
I've attached my arch/arm/Makefile. My build, host and target are on
same system. i am emulating the board with Qemu. The process is very
conventional. I've mounted my rootfs with -o loop and kernel and extra
modules go there with INSTALL_MOD_PATH and INSTALL_MOD_DIR. ARCH=arm
and CROSS_COMPILE=arm-linux-
>
>        Sam
>



-- 
Shaz

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#
# arch/arm/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-2001 by Russell King

LDFLAGS_vmlinux	:=-p --no-undefined -X
CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
OBJCOPYFLAGS	:=-O binary -R .note -R .note.gnu.build-id -R .comment -S
GZFLAGS		:=-9
#KBUILD_CFLAGS	+=-pipe
# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
KBUILD_CFLAGS	+=$(call cc-option,-marm,)

# Do not use arch/arm/defconfig - it's always outdated.
# Select a platform tht is kept up-to-date
KBUILD_DEFCONFIG := versatile_defconfig

# defines filename extension depending memory manement type.
ifeq ($(CONFIG_MMU),)
MMUEXT		:= -nommu
endif

ifeq ($(CONFIG_FRAME_POINTER),y)
KBUILD_CFLAGS	+=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
endif

ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
KBUILD_CPPFLAGS	+= -mbig-endian
AS		+= -EB
LD		+= -EB
else
KBUILD_CPPFLAGS	+= -mlittle-endian
AS		+= -EL
LD		+= -EL
endif

comma = ,

# This selects which instruction set is used.
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
arch-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7a,-march=armv5t -Wa$(comma)-march=armv7a)
arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7
ifeq ($(CONFIG_CPU_32v6),y)
arch-$(CONFIG_CPU_32v6K)	:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6k,-march=armv5t -Wa$(comma)-march=armv6k)
endif
arch-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5 $(call cc-option,-march=armv5te,-march=armv4t)
arch-$(CONFIG_CPU_32v4T)	:=-D__LINUX_ARM_ARCH__=4 -march=armv4t
arch-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4 -march=armv4
arch-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3 -march=armv3

# This selects how we optimise for the processor.
tune-$(CONFIG_CPU_ARM610)	:=-mtune=arm610
tune-$(CONFIG_CPU_ARM710)	:=-mtune=arm710
tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM946T)	:=$(call cc-option,-mtune=arm9e,-mtune=arm9tdmi)
tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
tune-$(CONFIG_CPU_XSCALE)	:=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
tune-$(CONFIG_CPU_XSC3)		:=$(call cc-option,-mtune=xscale,-mtune=strongarm110) -Wa,-mcpu=xscale
tune-$(CONFIG_CPU_V6)		:=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)

ifeq ($(CONFIG_AEABI),y)
CFLAGS_ABI	:=-mabi=aapcs-linux -mno-thumb-interwork
else
CFLAGS_ABI	:=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
endif

# Need -Uarm for gcc < 3.x
KBUILD_CFLAGS	+=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
KBUILD_AFLAGS	+=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float

CHECKFLAGS	+= -D__arm__

#Default value
head-y		:= arch/arm/kernel/head$(MMUEXT).o arch/arm/kernel/init_task.o
textofs-y	:= 0x00008000

 machine-$(CONFIG_ARCH_RPC)	   := rpc
 machine-$(CONFIG_ARCH_EBSA110)	   := ebsa110
 machine-$(CONFIG_ARCH_CLPS7500)   := clps7500
  incdir-$(CONFIG_ARCH_CLPS7500)   := cl7500
 machine-$(CONFIG_FOOTBRIDGE)	   := footbridge
  incdir-$(CONFIG_FOOTBRIDGE)	   := ebsa285
 machine-$(CONFIG_ARCH_CO285)	   := footbridge
  incdir-$(CONFIG_ARCH_CO285)	   := ebsa285
 machine-$(CONFIG_ARCH_SHARK)	   := shark
 machine-$(CONFIG_ARCH_SA1100)	   := sa1100
ifeq ($(CONFIG_ARCH_SA1100),y)
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
 textofs-$(CONFIG_SA1111)	   := 0x00208000
endif
 machine-$(CONFIG_ARCH_PXA)	   := pxa
 machine-$(CONFIG_ARCH_L7200)	   := l7200
 machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
 textofs-$(CONFIG_ARCH_CLPS711X)   := 0x00028000
 machine-$(CONFIG_ARCH_CLPS711X)   := clps711x
 machine-$(CONFIG_ARCH_IOP32X)	   := iop32x
 machine-$(CONFIG_ARCH_IOP33X)	   := iop33x
 machine-$(CONFIG_ARCH_IOP13XX)	   := iop13xx
 machine-$(CONFIG_ARCH_IXP4XX)	   := ixp4xx
 machine-$(CONFIG_ARCH_IXP2000)    := ixp2000
 machine-$(CONFIG_ARCH_IXP23XX)    := ixp23xx
 machine-$(CONFIG_ARCH_OMAP1)	   := omap1
 machine-$(CONFIG_ARCH_OMAP2)	   := omap2
  incdir-$(CONFIG_ARCH_OMAP)	   := omap
 machine-$(CONFIG_ARCH_S3C2410)	   := s3c2410
 machine-$(CONFIG_ARCH_LH7A40X)	   := lh7a40x
 machine-$(CONFIG_ARCH_VERSATILE)  := versatile
 machine-$(CONFIG_ARCH_IMX)	   := imx
 machine-$(CONFIG_ARCH_H720X)	   := h720x
 machine-$(CONFIG_ARCH_AAEC2000)   := aaec2000
 machine-$(CONFIG_ARCH_REALVIEW)   := realview
 machine-$(CONFIG_ARCH_AT91)	   := at91
 machine-$(CONFIG_ARCH_EP93XX)	   := ep93xx
 machine-$(CONFIG_ARCH_PNX4008)	   := pnx4008
 machine-$(CONFIG_ARCH_NETX)	   := netx
 machine-$(CONFIG_ARCH_NS9XXX)	   := ns9xxx
 textofs-$(CONFIG_ARCH_NS9XXX)	   := 0x00108000
 machine-$(CONFIG_ARCH_DAVINCI)	   := davinci
 machine-$(CONFIG_ARCH_KS8695)     := ks8695
  incdir-$(CONFIG_ARCH_MXC)	   := mxc
 machine-$(CONFIG_ARCH_MX3)	   := mx3
 machine-$(CONFIG_ARCH_ORION)	   := orion
 machine-$(CONFIG_ARCH_MSM7X00A)   := msm

ifeq ($(CONFIG_ARCH_EBSA110),y)
# This is what happens if you forget the IOCS16 line.
# PCMCIA cards stop working.
CFLAGS_3c589_cs.o :=-DISA_SIXTEEN_BIT_PERIPHERAL
export CFLAGS_3c589_cs.o
endif

# The byte offset of the kernel image in RAM from the start of RAM.
TEXT_OFFSET := $(textofs-y)

ifeq ($(incdir-y),)
incdir-y := $(machine-y)
endif
INCDIR   := arch-$(incdir-y)

ifneq ($(machine-y),)
MACHINE  := arch/arm/mach-$(machine-y)/
else
MACHINE  :=
endif

export	TEXT_OFFSET GZFLAGS MMUEXT

# Do we have FASTFPE?
FASTFPE		:=arch/arm/fastfpe
ifeq ($(FASTFPE),$(wildcard $(FASTFPE)))
FASTFPE_OBJ	:=$(FASTFPE)/
endif

# If we have a machine-specific directory, then include it in the build.
core-y				+= arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
core-y				+= $(MACHINE)
core-$(CONFIG_ARCH_S3C2410)	+= arch/arm/mach-s3c2400/
core-$(CONFIG_ARCH_S3C2410)	+= arch/arm/mach-s3c2412/
core-$(CONFIG_ARCH_S3C2410)	+= arch/arm/mach-s3c2440/
core-$(CONFIG_ARCH_S3C2410)	+= arch/arm/mach-s3c2442/
core-$(CONFIG_ARCH_S3C2410)	+= arch/arm/mach-s3c2443/
core-$(CONFIG_FPE_NWFPE)	+= arch/arm/nwfpe/
core-$(CONFIG_FPE_FASTFPE)	+= $(FASTFPE_OBJ)
core-$(CONFIG_VFP)		+= arch/arm/vfp/

# If we have a common platform directory, then include it in the build.
core-$(CONFIG_PLAT_IOP)		+= arch/arm/plat-iop/
core-$(CONFIG_ARCH_OMAP)	+= arch/arm/plat-omap/
core-$(CONFIG_PLAT_S3C24XX)		+= arch/arm/plat-s3c24xx/
core-$(CONFIG_ARCH_MXC)		+= arch/arm/plat-mxc/

drivers-$(CONFIG_OPROFILE)      += arch/arm/oprofile/
drivers-$(CONFIG_ARCH_CLPS7500)	+= drivers/acorn/char/
drivers-$(CONFIG_ARCH_L7200)	+= drivers/acorn/char/

libs-y				:= arch/arm/lib/ $(libs-y)

# Default target when executing plain make
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := xipImage
else
KBUILD_IMAGE := zImage
endif

all:	$(KBUILD_IMAGE)

boot := arch/arm/boot

#	Update machine arch and proc symlinks if something which affects
#	them changed.  We use .arch to indicate when they were updated
#	last, otherwise make uses the target directory mtime.

include/asm-arm/.arch: $(wildcard include/config/arch/*.h) include/config/auto.conf
	@echo '  SYMLINK include/asm-arm/arch -> include/asm-arm/$(INCDIR)'
ifneq ($(KBUILD_SRC),)
	$(Q)mkdir -p include/asm-arm
	$(Q)ln -fsn $(srctree)/include/asm-arm/$(INCDIR) include/asm-arm/arch
else
	$(Q)ln -fsn $(INCDIR) include/asm-arm/arch
endif
	@touch $@

archprepare: maketools

PHONY += maketools FORCE
maketools: include/linux/version.h include/asm-arm/.arch FORCE
	$(Q)$(MAKE) $(build)=arch/arm/tools include/asm-arm/mach-types.h

# Convert bzImage to zImage
bzImage: zImage

zImage Image xipImage bootpImage uImage: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@

zinstall install: vmlinux
	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@

CLEAN_FILES += include/asm-arm/mach-types.h \
	       include/asm-arm/arch include/asm-arm/.arch

# We use MRPROPER_FILES and CLEAN_FILES now
archclean:
	$(Q)$(MAKE) $(clean)=$(boot)

# My testing targets (bypasses dependencies)
bp:;	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
i zi:;	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@


define archhelp
  echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
  echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
  echo  '  uImage        - U-Boot wrapped zImage'
  echo  '  bootpImage    - Combined zImage and initial RAM disk' 
  echo  '                  (supply initrd image via make variable INITRD=<path>)'
  echo  '  install       - Install uncompressed kernel'
  echo  '  zinstall      - Install compressed kernel'
  echo  '                  Install using (your) ~/bin/installkernel or'
  echo  '                  (distribution) /sbin/installkernel or'
  echo  '                  install to $$(INSTALL_PATH) and run lilo'
endef