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List: kde-devel
Subject: Re: Build issues with g++ 3.3 and Linux kernel headers
From: James Richard Tyrer <tyrerj () acm ! org>
Date: 2003-08-31 2:29:24
[Download RAW message or body]
Petter E. Stokke wrote:
> There's a problem compiling certain parts of KDE using g++ 3.3 (in my
> case, 3.3.2, but reportedly it's a problem with any >= 3.3). It seems
> that some Linux kernel headers won't compile with g++ -ansi -pedantic,
> which is what the KDE build system uses. The problem appears in
> applications which #include <linux/cdrom.h> - at least parts of
> kdemultimedia and the CD burning tools in kdeextragear-2 - although the
> actual compile error is in asm/byteorder.h. The problem exists in both
> 2.4 and 2.6 kernel headers.
>
> Can something be done about that? Possibly having a KDE_OPTIONS flag or
> something similar in the build system which disables -ansi -pedantic for
> a given directory? My own solution of manually removing them from the
> Makefiles when I come across the problem is hardly acceptable for the
> KDE 3.2 release. :)
I have problem only with: "kdemultimedia". If you have the problem in
other modules, do the same with them.
The following kludge works for me:
Make a directory:
kdemultimedia/asm/
Copy to it:
byteorder.h
from an older Kernel. Attached.
--
JRT
["byteorder.h" (text/plain)]
#ifndef _I386_BYTEORDER_H
#define _I386_BYTEORDER_H
#include <asm/types.h>
#ifdef __GNUC__
/* For avoiding bswap on i386 */
#ifdef __KERNEL__
#include <linux/config.h>
#endif
static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
{
#ifdef CONFIG_X86_BSWAP
__asm__("bswap %0" : "=r" (x) : "0" (x));
#else
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
"rorl $16,%0\n\t" /* swap words */
"xchgb %b0,%h0" /* swap higher bytes */
:"=q" (x)
: "0" (x));
#endif
return x;
}
static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
{
__asm__("xchgb %b0,%h0" /* swap bytes */ \
: "=q" (x) \
: "0" (x)); \
return x;
}
#define __arch__swab32(x) ___arch__swab32(x)
#define __arch__swab16(x) ___arch__swab16(x)
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__
# define __SWAB_64_THRU_32__
#endif
#endif /* __GNUC__ */
#include <linux/byteorder/little_endian.h>
#endif /* _I386_BYTEORDER_H */
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