svn commit: r367072 - head/tools/build

[Mateusz Piotrowski]

Author: 0mp (doc,ports committer)
Date: Tue Oct 27 09:32:06 2020
New Revision: 367072
URL: https://svnweb.freebsd.org/changeset/base/367072

Log:
  Mount devfs inside a beinstall(8) chroot
  
  It turns out that without /dev/null beinstall is not able to complete and
  instead exits with messages similar to these:
  
    --------------------------------------------------------------
    >>> Installing kernel GENERIC completed on Sun Oct 25 17:47:37 CET 2020
    --------------------------------------------------------------
    /tmp/beinstall.JleGoP/mnt: Inspecting dirs /usr/src /usr/obj/usr/src/amd64.amd64
    --- installworld ---
    make[1]: "/usr/obj/usr/src/amd64.amd64/toolchain-metadata.mk" line 1: Using cached toolchain metadata from build at t480 on Sun Oct 25 15:53:28 CET 2020
    make[2]: "/dev/null" line 2: Need an operator
    make[2]: Fatal errors encountered -- cannot continuemake[1]: "/usr/src/Makefile.inc1" line 593: CPUTYPE global should be set with ?=.
    Cleaning up ...
    umount -f /tmp/beinstall.JleGoP/mnt/usr/src /tmp/beinstall.JleGoP/mnt/usr/obj/usr/src/amd64.amd64 /tmp/beinstall.JleGoP/mnt
    Destroyed successfully
    error: Installworld failed!
  
  Upon a bit of debugging, it turns out that /dev/null inside the chroot
  environment is full random bytes, which cause "make -f /dev/null" to
  misbehave. Mounting a proper devfs inside the chroot seems to be the most
  appropriate way to fix it.
  
  will@ also noted that this change requires that whatever is needed in devfs
  must exist in the old kernel.
  
  Approved by:	will
  MFC after:	2 week
  Differential Revision:	https://reviews.freebsd.org/D26944

Modified:
  head/tools/build/beinstall.sh

Modified: head/tools/build/beinstall.sh
==============================================================================
--- head/tools/build/beinstall.sh	Tue Oct 27 06:43:24 2020	(r367071)
+++ head/tools/build/beinstall.sh	Tue Oct 27 09:32:06 2020	(r367072)
@@ -223,6 +223,7 @@ fi
 create_be_dirs "${srcdir}" "${objdir}" || errx "Unable to create BE dirs"
 mount -t nullfs "${srcdir}" "${BE_MNTPT}${srcdir}" || errx "Unable to mount src"
 mount -t nullfs "${objdir}" "${BE_MNTPT}${objdir}" || errx "Unable to mount obj"
+mount -t devfs devfs "${BE_MNTPT}/dev" || errx "Unable to mount devfs"
 
 chroot ${BE_MNTPT} make "$@" -C ${srcdir} installworld || \
 	errx "Installworld failed!"