[Buildroot] [Bug 14346] New: BR2_PACKAGE_NFS_UTILS_RPC_NFSD does not patch CONFIG_NFSD in kernel configuration

[bugzilla@busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=14346

            Bug ID: 14346
           Summary: BR2_PACKAGE_NFS_UTILS_RPC_NFSD does not patch
                    CONFIG_NFSD in kernel configuration
           Product: buildroot
           Version: 2021.02.7
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
          Assignee: unassigned@buildroot.uclibc.org
          Reporter: mateusz.dukat1@gmail.com
                CC: buildroot@uclibc.org
  Target Milestone: ---

Overview:

Setting BR2_PACKAGE_NFS_UTILS_RPC_NFSD to 'y' does not patch CONFIG_NFSD in
Linux kernel configuration.

Steps to reproduce:

1) Build buildroot for i386, with kernel defconfig, and buildroot config
values:
BR2_PACKAGE_NFS_UTILS_RPC_NFSD=y
2) Run image on any machine/vm

Actual results:

When booting buildroot built like that, it immediately throws:

> Starting NFS daemon: rpc.nfsd: Unable to access /proc/fs/nfsd errno 2 (No such file or directory).
> Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart rpc.nfsd to correct the problem
> FAIL

Expected results:

NFS server starts correctly.

Build date and hardware:

Buildroot tag 2021.02.7 built on 16.11.2021 on Thinkpad X131e (intel) \w Ubuntu
server 20.04 LTS

Additional information:

To manually fix this problem, create text file in buildroot root directory
named "kernel_patch.txt" with value:

> CONFIG_NFSD=y

Then, in buildroot config, modify BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES to:

> BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="kernel_patch.txt"

And finally build new image.

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