Enabling kernel config options

English Open Build Service (OBS)
1

Is there any way to enable kernel config options disabled or not set on my branched kernel built through the OBS?

2

https://www.reddit.com/r/openSUSE/comments/72wz1l/best_way_to_compile_a_kernel_with_custom_options/

3

Oh, thanks. I just found out about *config.addon *too, can’t I use that to append stuff to the original config without having to fully replace it?

4

Yes, you can.

5

Not sure what i’m doing wrong, it gives me this error during build:

   35s] Using .config as base
   35s] Merging /home/abuild/rpmbuild/BUILD/kernel-default-5.8.0/config.addon/x86_64/default
   35s] Value of CONFIG_ANDROID is redefined by fragment /home/abuild/rpmbuild/BUILD/kernel-default-5.8.0/config.addon/x86_64/default:
   35s] Previous value: # CONFIG_ANDROID is not set
   35s] New value: CONFIG_ANDROID=y
   35s] 
   35s] #
   35s] # merged configuration written to .config (needs make)
   35s] #
   35s] + CONFIG_SUSE_KERNEL_RELEASED='--disable CONFIG_SUSE_KERNEL_RELEASED'
   35s] + echo home:alphard:branches:Kernel:Factory-acs
   35s] + egrep -qx -f /home/abuild/rpmbuild/SOURCES/release-projects
   35s] + ../scripts/config --set-str CONFIG_LOCALVERSION -1-default --enable CONFIG_SUSE_KERNEL --disable CONFIG_SUSE_KERNEL_RELEASED --disable CONFIG_DEBUG_INFO
(...)
   37s] Changes after running `make oldconfig':
   37s] -# CONFIG_DEBUG_INFO_COMPRESSED is not set
   37s] -# CONFIG_DEBUG_INFO_REDUCED is not set
   37s] -# CONFIG_DEBUG_INFO_SPLIT is not set
   37s] -# CONFIG_GDB_SCRIPTS is not set
   37s] +# CONFIG_ION is not set
   37s] -# CONFIG_SUSE_KERNEL_RELEASED is not set
   37s] -CONFIG_DEBUG_INFO_BTF=y
   37s] -CONFIG_DEBUG_INFO_DWARF4=y
   37s] -CONFIG_ION=n
   37s] 
   37s] error: Bad exit status from /var/tmp/rpm-tmp.z2Loil (%prep)
   37s] 
   37s] 
   37s] RPM build errors:
   37s]     line 158: It's not recommended to have unversioned Obsoletes: Obsoletes:      microcode_ctl
   37s]     extra tokens at the end of %endif directive in line 1582:  %endif # %CONFIG_SUSE_KERNEL_SUPPORTED
   37s] 
   37s]     extra tokens at the end of %endif directive in line 1583:  %endif # %CONFIG_MODULES
   37s] 
   37s]     Bad exit status from /var/tmp/rpm-tmp.z2Loil (%prep)

This is the relevant part I believe, do I need to post the full build log?
I’m trying to enable ashmem and binder for anbox, here is my custom *config.addon/x86_64/{debug,default,kvmsmall,syzkaller,vanilla}

CONFIG_ASHMEM=y
CONFIG_ANDROID=y
CONFIG_ANDROID_BINDER_IPC=y
CONFIG_ANDROID_BINDERFS=y
CONFIG_ANDROID_BINDER_DEVICES="binder,hwbinder,vndbinder"
CONFIG_ANDROID_BINDER_IPC_SELFTEST=y
CONFIG_ION=n
6

Link to your OBS project would be better.

7

Here it is: Welcome - openSUSE Build Service

8

It apparently fails due to CONFIG_ION=n which is interpreted as “change” instead of “addition”. Why do you need it? CONFIG_ION already defaults to “n”.

9

I’ve reviewed the options and turns out some things were wrong, now it compiles nicely.
Thanks!