Bug 726196

Summary:	sys-kernel/genkernel ignores USEflags for sys-fs/lvm2
Product:	Gentoo Linux	Reporter:	Michał Dec <moog621>
Component:	Current packages	Assignee:	Gentoo Genkernel Maintainers <genkernel>
Status:	RESOLVED INVALID
Severity:	normal	CC:	jstein
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Michał Dec 2020-05-30 10:20:20 UTC

I wanted to make a kernel on my ARM platform because since some update, genkernel can't crosscompile busybox. I was observing the logs and after the kernel, its modules, busybox, cryptsetup and e2fsprogs were finished I saw that genkernel is compiling boost.

Reproducible: Always

Steps to Reproduce:
1. Install sys-fs/lvm2 with USE -thin being a permanent flag for this package. Remember to not set static USE.
2. Ask genkernel to compile the kernel and initramfs.
Actual Results:  
Genkernel will compile boost in a situation where nobody wants boost and nobody asked for boost, and that's bad. It's bad because boost is a huge package that can compile for hours on some systems, which adds a lot more time spent on making a kernel with an initramfs.

Expected Results:  
Genkernel respects USEflags and compiles sys-fs/lvm2 without thin provisioning which is the only thing that requires boost in lvm2.

Comment 1 Thomas Deutschmann (RETIRED) gentoo-dev

2020-06-01 22:16:27 UTC

Closing as invalid. Latest genkernel-4 doesn't use any system packages anymore. Genkernel-4 builds everything it uses on its own.
Also, genkernel-4 should have working cross-compile support.

Please test with genkernel-4 and re-open/file a new bug if bug is still present in latest genkernel version.

Comment 2 Thomas Deutschmann (RETIRED) gentoo-dev

2020-06-01 22:21:17 UTC

Regarding your boost question: Because we are now building everything on our own and we need to support thin volumes, genkernel-4 also builds boost. Sure, for some systems this will take some time but making it optional (i.e. offer a --no-thin parameter) would be too complicated and given that genkernel-4 should have working cross compile support, it isn't worth it.