Bug 9568

Summary:	bbexample recipe fails to build unless PARALLEL_MAKE is disabled
Product:	[Build System, Metadata & Runtime] BitBake	Reporter:	Henry Bruce <henry.bruce>
Component:	bitbake	Assignee:	Joshua Lock <joshuagloe>
Status:	RESOLVED NOTABUG	QA Contact:
Severity:	minor
Priority:	Medium	CC:	poky.bs.watcher, poky.watcher
Version:	2.1
Target Milestone:	2.2
Hardware:	x86
OS:	Multiple
Whiteboard:
OS type for building Yocto:	---	Type of Regression:	---
Verified:		Documentation change:	No (bug/feature does not impact docs)

Description Henry Bruce 2016-05-02 21:22:25 UTC

bbexample is a simple autotools sample project. It is used in a recipe tutorial on yocto project wiki. See https://wiki.yoctoproject.org/wiki/Building_your_own_recipes_from_first_principles. This tutorial has a recipe with the line PARALLEL_MAKE = "" which allows the project to build. No explanation is given as to why this is necessary. If this entry is removed, build fails with error 
make[1]: *** No rule to make target '.libs/libbbexample.la', needed by 'bbexample'.  Stop.

If 'devtool add' is used to generate recipe it does not add the PARALLEL_MAKE so build fails.

Expected behavior
-----------------
run 'devtool add bbexample https://github.com/DynamicDevices/bbexample.git'
run 'devtool build bbexample' and observe successful build

Observed behavior
-----------------
run 'devtool add bbexample https://github.com/DynamicDevices/bbexample.git'
run 'devtool build bbexample' and observe above failure

Comment 1 Henry Bruce 2016-05-05 17:11:33 UTC

Can someone that understands autotools explain *why* this is happening?
Source is at https://github.com/DynamicDevices/bbexample

Comment 2 Henry Bruce 2016-05-05 17:29:11 UTC

Stupid question on the *why* bit. Posted in a moment of weakness. Please ignore.

Comment 3 Henry Bruce 2016-05-06 21:26:22 UTC

I tracked this down to a missing dependency statement in Makefile.am.

This project was a poor choice for use in the "Building your own recipes from first principles" article in the yoctoproject wiki but is not a bitbake bug.

I have forked bbexample and issued a pull request that fixes the problem, but I'm not sure if project is being maintained. If I don't get a response within a week or so, I'll change wiki to point to my fork.

Please close as "not a bug".

Comment 4 Joshua Lock 2016-05-09 08:41:56 UTC

Thanks for following through on this Henry. Resolving "NOTABUG" as requested.