linux-kernel - Re: scripts/mod/file2alias.c cross compile problem

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Message-ID: <20070802191509.GX3972@stusta.de>
Date:	Thu, 2 Aug 2007 21:15:09 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	Andreas Schwab <schwab@...e.de>, trenn@...e.de,
	Jan Dittmer <jdi@....org>, Len Brown <lenb@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org, rusty@...tcorp.com.au,
	jcm@...masters.org
Subject: Re: scripts/mod/file2alias.c cross compile problem

On Thu, Aug 02, 2007 at 08:09:03PM +0200, Sam Ravnborg wrote:
> 
> I second this. For anything visible in userspace from
> include/* we require usage of the kernel specific
> __u8, __u16, __u32, __u64 typedefs but for device_id we accept
> kernel_ulong_t which result in the following crap in
> file2alias.c:
> 
> /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
>  * use either stdint.h or inttypes.h for the rest. */
> #if KERNEL_ELFCLASS == ELFCLASS32
> typedef Elf32_Addr      kernel_ulong_t;
> #define BITS_PER_LONG 32
> #else
> typedef Elf64_Addr      kernel_ulong_t;
> #define BITS_PER_LONG 64
> #endif
> 
> And we ought to have __u64 available.
> See for example types.h from asm-i386:
> #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
> typedef __signed__ long long __s64;
> typedef unsigned long long __u64;
> #endif


You are talking about something different than the current problem.

The current problem is that when crosscompiling we get a different 
_padding_ due to file2alias.c being compiled with HOSTCC.


What you are talking about is a different issue, and I can't talk about 
it since I don't understand these interactions between modpost and depmod.


> 	Sam

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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