Messages in this thread | | | Date | Thu, 15 May 2008 23:46:32 +0300 | From | Adrian Bunk <> | Subject | Re: crossbuild fails in modpost |
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On Thu, May 15, 2008 at 09:19:26PM +0200, Jiri Slaby wrote: > Sam Ravnborg napsal(a): >> On Thu, May 15, 2008 at 07:35:39PM +0200, Sam Ravnborg wrote: >>> On Thu, May 15, 2008 at 07:12:34PM +0200, Jiri Slaby wrote: >>>> Well, let's fix sam's email. >>>> >>>> Jiri Slaby napsal(a): >>>>> Hi, >>>>> >>>>> probably >>>>> 4ce6efed48d736e3384c39ff87bda723e1f8e041 >>>>> kbuild: soften modpost checks when doing cross builds >>>>> >>>>> causes build failures on x86_64 kernel build on 32 bit machine: >>>>> >>>>> make -f /local/xslaby/hid/scripts/Makefile.modpost >>>>> YYYYYYYYYYYYYY x86_64 x86_64 >>>>> scripts/mod/modpost -m -a -o /local/xslaby/buhid/Module.symvers >>>>> -S -K /local/xslaby/buhid/Module.markers -M >>>>> /local/xslaby/buhid/Module.markers -s >>>>> XXXXXXXXXXXXXXXXXX 20: 0 (2), 4 (4), 8 (4), 12 (8) >>>>> FATAL: drivers/hid/hid-apple: sizeof(struct hid_device_id)=20 is >>>>> not a modulo of the size of section __mod_hid_device_table=648. >>>>> Fix definition of struct hid_device_id in mod_devicetable.h >>>>> make[2]: *** [__modpost] Error 1 >>>>> make[1]: *** [modules] Error 2 >>>>> make: *** [sub-make] Error 2 >>>>> >>>>> after sticking echo into: >>>>> __modpost: $(modules:.ko=.o) FORCE >>>>> + @echo YYYYYYYYYYYYYY $(KBUILD_BUILDHOST) $(ARCH) >>>>> $(call cmd,modpost) $(wildcard vmlinux) $(filter-out FORCE,$^) >>>>> >>> Your machine claims it is a x86_64 and you are building for a x86_64 >>> according to the following line: >>>>> YYYYYYYYYYYYYY x86_64 x86_64 >>> So it looks to me that you are building for 64 bit on a 64 bit machine. >>> So when you write: >>> on x86_64 kernel build on 32 bit machine: >>> >>> I assume you try to say that your HOSTCC is 32 bit and your >>> kernel cc is 64 bit (or something similar). >>> >>> The commit you reference loosen up the check so we do not do the >>> check if we _know_ that the host and the target system differs. >>> The only thing I can imagine right now to solve your issue would >>> be to skip the check if we do not use the same gcc for target and host? > > Well, the compiler is the same, but it's told to compile the kernel with > -m64. It runs on x86_64 kernel and i386 userspace. It's debian i386 gcc > package which understands x86_64 objects too. No SUBARCH option, it seems > to default to x86_64. >...
Unless you manually fiddle with ARCH you can only build a kernel with the same 32<->64bit setting as your currently running kernel (no matter which userspace you use)...
cu Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed
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