I know that these mainline builds are unsupported in any way, but there
have been some efforts to quickly patch this problem for cross-
compiling.

Examples: https://bugs.launchpad.net/ubuntu/+source/linux-ti-
omap4/+bug/666267/comments/16

Also, I wrote up a quick hacky post-install script to workaround this
issue, which works for arm64 mainline builds, here:

https://gist.github.com/satmandu/b60a804fa2275615c88367bc68e4bad0

As a quick summary of the problem, it appears that these files are
needed in the target architecture to build modules, but are in the
cross-compile host architecture:

scripts/recordmcount
scripts/mod/modpost
scripts/basic/fixdep

"make scripts" does everything except make modpost, so I use "make
modules_prepare" which errors out, but does make everything one needs.

Oh, and unfortunately the packaging scripts seem to leave out these
header files which are needed for the aforementioned compile process:

security/selinux/include/classmap.h
security/selinux/include/initial_sid_to_string.h
tools/include/tools/be_byteshift.h
tools/include/tools/le_byteshift.h

So I download those first too.

If any of that process could be eliminated, it would be appreciated. :)

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1665447

Title:
  kernel ppa is building amd64 files inside mainline ppc64el package

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Kernel PPA contains a files that are compiled against amd64 instead of
  ppc64el. This makes this kernel unusable:

  Example:

  PPA: http://kernel.ubuntu.com/~kernel-ppa/mainline/

  Kernel: http://kernel.ubuntu.com/\~kernel-ppa/mainline/v4.10-rc8
  /linux-
  headers-4.10.0-041000rc8-generic_4.10.0-041000rc8.201702121731_ppc64el.deb

  ➜  ppa dpkg-deb -x linux-
  headers-4.10.0-041000rc8-generic_4.10.0-041000rc8.201702121731_ppc64el.deb
  .

  ➜  ppa find . -name fixdep                                                 
  ./usr/src/linux-headers-4.10.0-041000rc8-generic/scripts/basic/fixdep

  ➜  ppa file 
./usr/src/linux-headers-4.10.0-041000rc8-generic/scripts/basic/fixdep
  ./usr/src/linux-headers-4.10.0-041000rc8-generic/scripts/basic/fixdep: ELF 
64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, 
interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, 
BuildID[sha1]=438d1c0255e4943c4af1b9568a4cbe83d9034737, not stripped

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