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Date: Tue, 1 Nov 1994 11:58:57 +0100
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From: " (Kai Petzke)" <wpp@marie.physik.tu-berlin.d400.de>
Message-ID: <9411011116.AA16487@lise.physik.tu-berlin.de>
To: bachesta@angst.tera.com
Cc: postgres@postgres.Berkeley.EDU
In-Reply-To: <9411010530.AA24046@angst.tera.com>
Subject: Re: problems building src/backend/storage/ipc/s_lock.c
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> 
> 
> I'm busy porting postgres 4.2 to NetBSD 1.0 and I came across  the
> following error:

[...]

> #if defined(__i386__) && defined(__GNUC__)
>  
> tas(lock)
>     slock_t *lock;
> {
>     slock_t res;
>     __asm__("xchgb %0,%1":"=q" (res),"=m" (*m):"0" (0x1));
>     return(res);
> }
>  
> line 283 is the __asm__ line. My questin is where is "m" supposed to
> be defined and why does this compile for other OS's (i.e. linux freebsd),
> or does it. I'm not an assembly guru so any help you can give me is
> appreciated.

No, the (*m) is wrong.  It should be (*lock).

You have started your port from the core distribution of Postgres,
which has only part of the linux or FreeBSD specific changes in
it (eg. those, that Paul Aoki came around to include).

I recommend you to get the FreeBSD (or linux) patches, and apply
them, before you continue.  It will save you lots of doubled work.




Kai


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