[oe] perl/cpan issue (cpan.bbclass, perl/config.sh)

[Frans Meulenbroeks]

2009/11/7 Frans Meulenbroeks <fransmeulenbroeks at gmail.com>:
> I was trying to make xmltv but noticed some files were missing from the recipe.
> The recipe includes cpan
>
> Apparently some of the files are in the xmltv work dir but others are
> copied to the perl work dir.
> I don't think this is good, but I am not a perl/cpan expert, so
> seeking for advice and/or a fix.
>
> Apparently cpan.bbclass invokes perl/config.sh
> This one contains things like:
> config_arg7='-Dinstallprefix=/home/frans/oe/tmp_angstrom/work/armv7a-angstrom-linux-gnueabi/perl-5.8.8-r29/image'
> ..
> installbin='/home/frans/oe/tmp_angstrom/work/armv7a-angstrom-linux-gnueabi/perl-5.8.8-r29/image/usr/bin'
> ...
> Guess config.sh is the bad guy
> Not sure how to fix this.
>
> Please advise (or if you are a wiz, please fix and I'll study the fix
> and learn from it :-) )

I had a fresh stab on this.
perl/config.sh gives the install dir.

config.sh is provided by the perl package but the perl recipe
substitutes the destination directory @DESTDIR@ with ${D}

So basically we can either:
a) put all packages that require perl/config.sh within recipes/perl
b) use an environment var in perl/config.sh (something that can be
replaced with ${D} during package build
c) have a config.sh with @DATADIR@ in it and let cpan.class replace it
wtih ${D} and write to a temp.sh and execute that one (or have a sed
script that replaces the vars) Note sure if that is ok, others
probably also use  perl/config.sh
d) in the target recipe hack the paths to the proper value using some
nifty sed script.
e) the recipe copies the data from the perl image dir to its own image dir.
f) something else

Not sure how to resolve this (and most of the above is beyond my
current capabilities).
Any feedback/suggestion is appreciated.

Frans

PS:  and if no-one responds to this I guess I'll go for the way that
is easiest for me: move the recipe to