[gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Iain Buchanan]

Hi all,

I was just trying to compile one of my programs that includes
linux/threads.h for the #define PID_MAX_DEFAULT, however, threads.h
isn't there anymore!

I've just upgraded linux-headers to 2.6.19 - is this the problem?  I
can't find a replacement for PID_MAX_DEFAULT anywhere in the header
files - has the name changed?

google was also unhelpful AFAICT.  I'd appreciate help!

thanks,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

Nothing cures insomnia like the realization that it's time to get up.

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Re: [gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Karl Chen]

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I could find thread.h file there!
Maybe your tar ball of kernel has been damaged!
you could download it again and have a try !


On 1/4/07, Iain Buchanan <iaindb@netspace.net.au> wrote:
>
> Hi all,
>
> I was just trying to compile one of my programs that includes
> linux/threads.h for the #define PID_MAX_DEFAULT, however, threads.h
> isn't there anymore!
>
> I've just upgraded linux-headers to 2.6.19 - is this the problem?  I
> can't find a replacement for PID_MAX_DEFAULT anywhere in the header
> files - has the name changed?
>
> google was also unhelpful AFAICT.  I'd appreciate help!
>
> thanks,
> --
> Iain Buchanan <iaindb at netspace dot net dot au>
>
> Nothing cures insomnia like the realization that it's time to get up.
>
> --
> gentoo-user@gentoo.org mailing list
>
>

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Re: [gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Daniel Iliev]

Iain Buchanan wrote:
> Hi all,
>
> I was just trying to compile one of my programs that includes
> linux/threads.h for the #define PID_MAX_DEFAULT, however, threads.h
> isn't there anymore!
>
> I've just upgraded linux-headers to 2.6.19 - is this the problem?  I
> can't find a replacement for PID_MAX_DEFAULT anywhere in the header
> files - has the name changed?
>
> google was also unhelpful AFAICT.  I'd appreciate help!
>
> thanks,
>   



grep -n PID_MAX_DEFAULT /usr/include/linux/threads.h
28:#define PID_MAX_DEFAULT 0x8000
33:#define PID_MAX_LIMIT (sizeof(long) > 4 ? 4*1024*1024 : PID_MAX_DEFAULT)

It comes with "sys-kernel/linux-headers". Since it s a system package
you should already have it. There is also another version of "threads.h"
which comes with the kernel source:
/usr/src/linux/include/linux/threads.h, but AFAIK it is recommended to
use the first one.

-- 
Best regards,
Daniel


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Re: [gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Iain Buchanan]

On Thu, 2007-01-04 at 08:48 +0200, Daniel Iliev wrote:
> Iain Buchanan wrote:
> > Hi all,
> >
> > I was just trying to compile one of my programs that includes
> > linux/threads.h for the #define PID_MAX_DEFAULT, however, threads.h
> > isn't there anymore!

[snip]

> grep -n PID_MAX_DEFAULT /usr/include/linux/threads.h
> 28:#define PID_MAX_DEFAULT 0x8000
> 33:#define PID_MAX_LIMIT (sizeof(long) > 4 ? 4*1024*1024 : PID_MAX_DEFAULT)

$ ls /usr/include/linux/threads.h
ls: cannot access /usr/include/linux/threads.h: No such file or
directory

$ slocate threads.h
/usr/include/X11/Xthreads.h
/usr/include/libxml2/libxml/threads.h
/usr/include/dbus-1.0/dbus/dbus-threads.h
/usr/include/stlport/stl/_threads.h
/usr/lib/gcc/i686-pc-linux-gnu/3.4.6/include/g++-v3/bits/stl_threads.h
/usr/lib/klibc/include/linux/threads.h
/usr/share/doc/libvorbis-1.1.2/txt/doc/vorbisfile/threads.html
/usr/src/linux-2.6.18-suspend2/include/linux/threads.h
/usr/src/linux-2.6.19-suspend2-r1/include/linux/threads.h

but I don't want to -I any of those!

> It comes with "sys-kernel/linux-headers".

$ equery l linux-headers
[ Searching for package 'linux-headers' in all categories among: ]
 * installed packages
[I--] [ ~] sys-kernel/linux-headers-2.6.19 (0)

what version do you have?

thanks,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

The main problem I have with cats is, they're not dogs.
		-- Kevin Cowherd

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Re: [gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Daniel Iliev]

Iain Buchanan wrote:
> --snip--
>
> $ slocate threads.h
> /usr/include/X11/Xthreads.h
> /usr/include/libxml2/libxml/threads.h
> /usr/include/dbus-1.0/dbus/dbus-threads.h
> /usr/include/stlport/stl/_threads.h
> /usr/lib/gcc/i686-pc-linux-gnu/3.4.6/include/g++-v3/bits/stl_threads.h
> /usr/lib/klibc/include/linux/threads.h
> /usr/share/doc/libvorbis-1.1.2/txt/doc/vorbisfile/threads.html
> /usr/src/linux-2.6.18-suspend2/include/linux/threads.h
> /usr/src/linux-2.6.19-suspend2-r1/include/linux/threads.h
>
> but I don't want to -I any of those!
>
>   
My mistake - I should paste the whole output but only:

"/usr/include/linux/threads.h" and "/usr/src/linux-2.6.18-suspend2/include/linux/threads.h"

> what version do you have?
> thanks,
>   

 "sys-kernel/linux-headers-2.6.11-r2" on stable "amd64"


-- 
Best regards,
Daniel


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Re: [gentoo-user] [OT][TYPO] where is PID_MAX_DEFAULT ?

[Daniel Iliev]

This message is just to correct a typo in my previous mail in the same
thread.

Please, read "My mistake - I should *NOT* have pasted the whole output
but only:" instead of "My mistake - I should paste the whole output but
only:"


I'm sorry about this.

-- 
Best regards,
Daniel


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Re: [gentoo-user] [OT] where is PID_MAX_DEFAULT ?

[Richard Fish]

On 1/3/07, Iain Buchanan <iaindb@netspace.net.au> wrote:
> Hi all,
>
> I was just trying to compile one of my programs that includes
> linux/threads.h for the #define PID_MAX_DEFAULT, however, threads.h
> isn't there anymore!

Hmm, on linux the maximum PID can be changed dynamically at run time.
Wouldn't it be better to change this to read /proc/sys/kernel/pid_max?

> I've just upgraded linux-headers to 2.6.19 - is this the problem?

It seems so.  From kernel-2.eclass:

        # 2.6.18 introduces headers_install which means we dont need any
        # of this crap anymore :D
        if kernel_is ge 2 6 18 ; then
                env_setup_xmakeopts
                emake headers_install
INSTALL_HDR_PATH="${D}"/${ddir}/.. ${xmakeopts} || die

In other words, for versions previous to 2.6.18, (almost) all headers
in the tarball were installed.  For 2.6.18 and later, the makefile in
the tarball defines what gets installed.

If you truly need this header, make a private copy for your source
directory, or just define PID_MAX_DEFAULT yourself.  But as I
mentioned above, it can be changed at run-time, so relying on this to
be constant could be dangerous.

-Richard
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