Re: Building custom kernel modules (e.g. VHBA for CDEmu)
Pierre Neidhardt writes: > The only thing we need, beside a C compiler, is this KDIR, which on Guix > _could_ be found at > > /gnu/store/…-linux-libre-5.0.1/lib/modules/5.0.1/build > > Sadly, for us it's a dangling link to > /tmp/guix-build-linux-libre-5.0.1.drv-0/linux-5.0.1. > > I presume that the answer is simple: replace the link with the folder. > But that would eat up significantly more disk space. So we could > replace the link with a link to a new "build" output of the linux-libre > package, which would contain this "build" folder. If that's all it takes, then it makes sense to me. Do we have any experienced kernel hackers on the list who can comment more on this? -- Chris signature.asc Description: PGP signature
Building custom kernel modules (e.g. VHBA for CDEmu)
Hi! The question of building custom Linux kernel modules was recently brought up in bug #35758 (packaging CDEmu). I'll summarize: a typical Makefile to build a kernel module looks like this: --8<---cut here---start->8--- VHBA_VERSION := 20170610 KERNELRELEASE ?= $(shell uname -r) KDIR ?= /lib/modules/$(KERNELRELEASE)/build PWD ?= $(shell pwd) obj-m := vhba.o ccflags-y := -DVHBA_VERSION=\"$(VHBA_VERSION)\" -Werror default: modules install: modules_install modules modules_install clean: $(MAKE) -C $(KDIR) M=$(PWD) $@ --8<---cut here---end--->8--- The only thing we need, beside a C compiler, is this KDIR, which on Guix _could_ be found at /gnu/store/…-linux-libre-5.0.1/lib/modules/5.0.1/build Sadly, for us it's a dangling link to /tmp/guix-build-linux-libre-5.0.1.drv-0/linux-5.0.1. I presume that the answer is simple: replace the link with the folder. But that would eat up significantly more disk space. So we could replace the link with a link to a new "build" output of the linux-libre package, which would contain this "build" folder. Thoughts? -- Pierre Neidhardt https://ambrevar.xyz/ signature.asc Description: PGP signature
