Re: [ptxdist] how to configure perl scripting to compile with thread support?

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Wed, Apr 23, 2014 at 02:44:14PM +0000, Martin Hollingsworth wrote:
> Here some more info I found in the meantime.
> You can call "perl -V" which gives a lot of information about the build settings.
> The target system outputs:
> ---------
> [...]
>   Platform:
>     osname=linux, osvers=current, archname=arm-linux
>     uname='arm-cortexa8-linux-gnueabihf'
>     config_args='-Dusethreads -A ldflags=-pthread --prefix=/usr --host=arm-cortexa8-linux-gnueabihf --build=i686-host-linux-gnu --host=arm-cortexa8-linux-gnueabihf --target=arm-cortexa8-linux-gnueabihf --set-ld=arm-cortexa8-linux-gnueabihf-gcc --keeplog --mode=target --target=arm-cortexa8-linux-gnueabihf --targetarch=arm-cortexa8-linux-gnueabihf'
> [...]
>     useithreads=undef, usemultiplicity=undef
> [...]
> ---------
> 
> As one can see from config_args the flag -Dusethreads is received, but the Perl internal flag "useithreads" stays undef. On my host this value is "defined" and threading works.
> When you look into the config.sh file  (Shortened path: /BSP/phyCORE-AM335x-XXX/platform-XXX/build-target/perl-5.14.2/config.sh) which is generated by perl itself during the ptxdist build process, you will find this particular flag undef here as well.
> I suppose this is the root of all evil - the perl config.sh file is not generated correctly. The question now is why...?

Just speculating here: Did you try to set -Duseithreads instread of
-Dusethreads? At least in 5.18.2 these seem to be separate options. I have
no idea what the difference is.

Michael

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