linux-kernel - Re: Linux Kernel include files

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Date:	Wed, 27 Jun 2007 15:45:44 +0200
From:	Joerg.Schilling@...us.fraunhofer.de (Joerg Schilling)
To:	bunk@...sta.de, dwmw2@...radead.org
Cc:	david@...g.hm, linux-kernel@...r.kernel.org,
	schilling@...us.fraunhofer.de
Subject: Re: Linux Kernel include files

Adrian Bunk <bunk@...sta.de> wrote:

> > Personally, I think that's a load of bollocks. And it certainly doesn't
> > apply to Linux-specific files like <linux/cdrom.h>, which are perfectly
> > entitled to use a C standard from last millennium, regardless of
> > namespace 'pollution' issues. That's why we continue to use the crappy
> > __u32 types. Can you be more specific about why this is a problem? Don't
> > we mostly define those crappy types using arch-specific knowledge, as
> > 'int', 'long', etc?
> >...
>
> It would certainly help if Joerg would tell what exactly breaks, but I 
> spot one likely problem in include/asm-i386/types.h:
>
> #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
> typedef __signed__ long long __s64;
> typedef unsigned long long __u64;
> #endif
>
> It might make sense to remove the #if and simply require that
> a C compiler under Linux must know about the C99 "long long"?

The Sun compiler did support the long long type before gcc did.
This is not a problem.

I get e.g.:

 ==> COMPILING "scsihack.o"
"/usr/include/linux/byteorder/little_endian.h", line 43: inline keyword applied to __le64: must be a function identifier
"/usr/include/linux/byteorder/little_endian.h", line 43: syntax error before or at: __cpu_to_le64p
"/usr/include/linux/byteorder/little_endian.h", line 45: operands must have arithmetic type: op "*"
"/usr/include/linux/byteorder/little_endian.h", line 47: syntax error before or at: *
"/usr/include/linux/byteorder/little_endian.h", line 49: undefined symbol: p
"/usr/include/linux/byteorder/little_endian.h", line 49: cannot dereference non-pointer type
"/usr/include/linux/byteorder/little_endian.h", line 67: inline keyword applied to __be64: must be a function identifier
"/usr/include/linux/byteorder/little_endian.h", line 67: syntax error before or at: __cpu_to_be64p
"/usr/include/linux/byteorder/little_endian.h", line 69: syntax error before or at: __swab64p
"/usr/include/linux/byteorder/little_endian.h", line 71: syntax error before or at: *
"/usr/include/linux/byteorder/little_endian.h", line 73: undefined symbol: p
"scsi-linux-sg.c", line 1152: warning: statement not reached
cc: acomp failed for scsihack.c

And it seems that yout proposal did point into the right direction.

After copying /usr/include/linux/types.h  to
/opt/sunstudio12/prod/include/cc/linux/types.h and removing all 

#if defined(__GNUC__) && !defined(__STRICT_ANSI__) 
...
#endif

stuff, I got cdrtools compiled using "suncc" and I did even get a woring 
cdrecord.

Thanks for the help!

Jörg

-- 
 EMail:joerg@...ily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
       js@...tu-berlin.de                (uni)  
       schilling@...us.fraunhofer.de     (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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