[yocto] Strange error trying to use externalsrc

[Matt Schuckmann]

> -----Original Message-----
> From: Paul Eggleton [mailto:paul.eggleton at linux.intel.com]
> Sent: Thursday, April 23, 2015 5:20 PM
> To: Matt Schuckmann
> Cc: yocto at yoctoproject.org
> Subject: Re: [yocto] Strange error trying to use externalsrc
> 
> On Thursday 23 April 2015 12:37:30 Matt Schuckmann wrote:
> > I'm trying to use the externalsrc class to make it easier build an
> > application under active development.
> >
> > I'm working off of the Dylan branch.
> >
> > If I add the following 2 lines to my site.conf
> >
> > INHERIT += "externalsrc"
> > S_pn-keypadd = "/home/dev/builds/zanzibar/keypadd"
> >
> > I get the following error when I try to build the keypadd recipe.
> >
> > ERROR: Function failed: gnu-config-native: LIC_FILES_CHKSUM points to
> > an invalid file:
> > /home/dev/builds/zanzibar/tisdk/zanzibar/build/arago-tmp-external-
> lina
> > ro-to
> > olchain/work/i686-linux/gnu-config-native/20120814-r0/gnu-config-
> 20120
> > 814/co nfig.guess ERROR: Logfile of failure stored in:
> > /home/dev/builds/zanzibar/tisdk/zanzibar/build/arago-tmp-external-
> lina
> > ro-to
> > olchain/work/i686-linux/gnu-config-native/20120814-
> r0/temp/log.do_configure.
> > 11698
> > Log data follows:
> > | DEBUG: Executing python function sysroot_cleansstate
> > | DEBUG: Python function sysroot_cleansstate finished
> > | DEBUG: Executing shell function do_configure
> > | DEBUG: Shell function do_configure finished
> > | DEBUG: Executing python function do_qa_configure
> > | NOTE: Checking autotools environment for common misconfiguration
> > | DEBUG: Python function do_qa_configure finished
> > | ERROR: Function failed: gnu-config-native: LIC_FILES_CHKSUM points
> > | to an invalid file:
> > | /home/dev/builds/zanzibar/tisdk/zanzibar/build/arago-tmp-external-
> li
> > | naro-
> > | toolchain/work/i686-linux/gnu-config-native/20120814-r0/gnu-config-
> 2
> > | 012081
> > | 4/config.guess
> > ERROR: Task 26
> > (virtual:native:/home/dev/builds/zanzibar/tisdk/zanzibar/sources/oe-
> co
> > re/me ta/recipes-devtools/gnu-config/gnu-config_20120814.bb,
> > do_configure) failed with exit code '1'
> >
> >
> > The keypadd recipe is marked as CLOSED but I've also tried MIT and
> > GPL. I've even added a license file and MD5 checksum. Interestingly
> > externalsrc seems to work if I add these 2 lines to the recipe.
> >
> > inherit externalsrc
> > S = "/home/dev/builds/zanzibar/keypadd"
> >
> > But I don't want to have to edit the recipe every time I want to
> > switch to building from a local directory.
> >
> > Any suggestions as to what is wrong?
> 
> Don't set S to specify the path to the external source tree - set
> EXTERNALSRC instead, or otherwise externalsrc.bbclass's actual
> functionality isn't active.

Thanks for the reply Paul, but the Dylan (1.4) manual says to set S, also the externalsrc.bbclass for Dylan doesn't reference EXTERNALSRC. 
http://www.yoctoproject.org/docs/1.4/dev-manual/dev-manual.html#building-software-from-an-external-source
https://github.com/openembedded/oe-core/blob/dylan/meta/classes/externalsrc.bbclass

Am I missing something? 

Thanks,
Matt S.