Re: threading and FreeBSD

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: threading and FreeBSD
Date: 2003-08-16 15:34:39
Message-ID: 200308161534.h7GFYdG02253@candle.pha.pa.us
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I have applied a patch to have NEED_REENTRANT_FUNC_NAMES _require_ the
*_r libraries, rather than the old behavior of just using the *_r
libraries if they exist. With my new research documented in thread.c, I
think this is the proper way to handle it.

I have also marked FreeBSD as not requiring NEED_REENTRANT_FUNC_NAMES
anymore. I think it uses libc_r or -pthread compile flag rather than
the *_r names.

I need other platforms to test this change because platforms marked as
NEED_REENTRANT_FUNC_NAMES will _need_ those *_r functions to exist for
threading.

---------------------------------------------------------------------------

Christopher Kings-Lynne wrote:
> I've been doing all my freebsd/alpha build with --enable-thread-safety for
> weeks and I haven't seen any compile or running problems...
>
> Configure doesn't see it tho:
>
> checking pthread.h usability... yes
> checking pthread.h presence... yes
> checking for pthread.h... yes
> checking for strerror_r... yes
> checking for getpwuid_r... no
> checking for gethostbyname_r... no
>
> Chris
>
> ----- Original Message -----
> From: "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us>
> To: "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org>
> Sent: Friday, August 15, 2003 6:43 AM
> Subject: [HACKERS] threading and FreeBSD
>
>
> > Our current template/freebsd has:
> >
> > CFLAGS='-pipe'
> >
> > case $host_cpu in
> > alpha*) CFLAGS="$CFLAGS -O" ;;
> > esac
> >
> > SUPPORTS_THREADS=yes
> > case $host_os in
> > freebsd2*|freebsd3*|freebsd4*)
> > THREAD_CFLAGS="-pthread"
> > NEED_REENTRANT_FUNC_NAMES=yes
> > ;;
> > *)
> > THREAD_LIBS="-lc_r"
> > NEED_REENTRANT_FUNC_NAMES=yes
> > ;;
> > esac
> >
> > Now, this says FreeBSD needs reentrant named functions for all versions.
> >
> > However, our main server (4.8-STABLE FreeBSD) doesn't have any mention
> > of getpwuid_r(). Would some FreeBSD folks test the
> > --enable-thread-safey and let us know how things work?
> >
> > --
> > Bruce Momjian | http://candle.pha.pa.us
> > pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
> > + If your life is a hard drive, | 13 Roberts Road
> > + Christ can be your backup. | Newtown Square, Pennsylvania
> 19073
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 2: you can get off all lists at once with the unregister command
> > (send "unregister YourEmailAddressHere" to majordomo(at)postgresql(dot)org)
> >
>

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

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