[Buildroot] perl XS modules

[Thomas Petazzoni]

Hello,

On Tue, 12 Jul 2016 10:15:54 +0200, Arne Caspari wrote:

> Thank you very much for coming back to me. It is highly appreciated. 
> 
> I did not know about the scancpan-Script - this would have saved me a
> ton of work, literally since I just ported a package with very very
> many module dependencies (the Logitech Media Server) to buildroot. Ah
> well...

The scancpan script is mentioned in the Buildroot manual:

"""

 So, this file and the Config.in can be generated by running the script
 supports/scripts/scancpan Foo-Bar in the Buildroot directory (or in
 the BR2_EXTERNAL directory). This script creates a Config.in file and
 foo-bar.mk file for the requested package, and also recursively for
 all dependencies specified by CPAN. You should still manually edit the
 result. In particular, the following things should be checked.

"""

> I finally found the issue with the perl XS packages though: The perl
> MakeMaker module fails to generate a correct Makefile but instead
> messes up the configuration with the host-perl one. I kind of fixed the
> issue for me in a very hackish way by modifying the generated Makefile
> with the following script: 
> 
> define PERL_XML_PARSER_BUILD_CMDS
> 	sed "s~/usr/bin/gcc~$(TARGET_CC) -Os~" -i $(@D)/Makefile
> 	sed "s~/usr/bin/gcc~$(TARGET_CC) -Os~" -i $(@D)/Expat/Makefile
> 	sed "s~x86_64~$(KERNEL_ARCH)~" -i $(@D)/Expat/Makefile
> 	sed "s~host/usr/lib~staging/usr/lib~" -i $(@D)/Expat/Makefile
> 	$(MAKE) $(@D)/Makefile -C $(@D)
> endef
> 
> The module loads correctly afterwards. Unfortunately I do not have any
> experience with perl or the MakeMaker module to come up with a less
> insane fix.

Again, could you give a Buildroot configuration, and a test scenario
that allows us to reproduce the issue ?

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com