Bug 675680

Summary:	sys-devel/clang-6.0.1 emerge fails with parallel compilation
Product:	Gentoo Linux	Reporter:	alex Mezey <gentoobugs>
Component:	Current packages	Assignee:	LLVM support project <llvm>
Status:	RESOLVED INVALID
Severity:	normal	CC:	mgorny
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description alex Mezey 2019-01-17 10:29:48 UTC

My emerge ... @world failed with clang. I don't have the build log any more. I had 'MAKEOPTS="-j11"' in my make.conf. The error message said ninja -j11 (and one more or some more options) had an error. This error was not more specified or I didn't find it in the mixed messages of 11 threads.
I changed to MAKEOPTS="-j1" emerged -1 clang, which took some time but was successfull and then changed my make.conf back and started emerge ... @world again. I have not investigated more.

I guess some dependencies which are processed by ninja should be fixed.
It works for me now, but was very time consuming and would have been much more time consuming if I would not got the lucky guess. If an ebuild cannot be build parallel there is a way to handle it within the ebuild. This would be a second solution if the ninja stuff cannot be fixed. Of cause it would be better if it would work parallel.
I think I filed a similar bug with something some time ago. I don't remember which ebuild it was and couldn't find it here.

THIS MIGHT BE A BUG IN NINJA OR IT'S DOCUMENTATION.

Comment 1 Michał Górny archtester

2019-01-17 18:45:47 UTC

Can't help you without the details.  It is entirely possible you've ran out of memory.