linux-kernel - [RFC PATCH v2 00/27] Compile test and fixes for exported header files

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Date:	Mon,  1 Sep 2014 09:25:51 +0300
From:	Mikko Rapeli <mikko.rapeli@....fi>
To:	linux-kernel@...r.kernel.org
Cc:	linux-kbuild@...r.kernel.org, mikko.rapeli@....fi
Subject: [RFC PATCH v2 00/27] Compile test and fixes for exported header files

This patch series introduces a simple compile test for exported header files
and fixes a few example findings from the test.

It's a bit of a pain to see headers in userspace with unknown kernel
definitions, incomplete header file dependencies and other compile failures.

The test was simple until I found out that some kernel headers depend on
gcc and libc headers.  Now there's a hack to copy libc headers and hard coded
path to gcc headers for the tests but hopefully in further iterations I can
make this more portable. Maybe there's a chance that a test like this
could be added into 'headers_chech_all' or even 'headers_install'.
Further uses for compiling headers might be ABI checkers but I've not
explored this any further.

The fixed issues are just a few samples I've been able to fix so far.
I'm hoping to get some feedback if fixes or the tests are doing something
completely wrong. Some problems like with via_drm.h seem several years old but
have not been fixed thus far:

http://marc.info/?l=linux-kbuild&m=122919682002000&w=2

Mikko Rapeli (27):
  Compile test script for exported header files
  scripts/headers.sh: add verbose option to make calls if defined
  Makefile: propagate verbose options
  headers_install.sh: enhance error handling
  drm.h: include stdlib.h in userspace
  drm_mode.h: include stdint.h and linux/types.h in userspace
  exynos_drm.h: include stdint.h in userspace
  nouveau_drm.h: include stdint.h in userspace
  radeon_drm.h: include stdint.h in userspace
  vmwgfx_drm.h: include drm/drm.h instead of drm.h in userspace
  dm-log-userspace.h: include stdint.h in userspace
  hsi_char.h: include stdint.h in userspace
  ebtables.h: include stdint.h in userspace
  cld.h: include stdint.h in userspace
  rds.h: include stdint.h in userspace
  sctp.h: include stdint.h in userspace
  scsi_bsg_fc.h: include stdint.h in userspace
  scsi_netlink.h: include stdint.h in userspace
  scsi_netlink_fc.h: include stdint.h in userspace
  hdspm.h: include stdint.h in userspace
  gntalloc.h: include stdint.h in userspace
  gntdev.h: include stdint.h in userspace
  r128_drm.h: include drm/drm.h
  via_drm.h: include linux/types.h instead of non-existing
    via_drmclient.h
  via_drm.h: hide struct via_file_private in userspace
  savage_drm.h: include <drm/drm.h>
  sis_drm.h: hide sis_file_private in userspace

 Makefile                                       |  8 +--
 include/uapi/drm/drm.h                         |  4 ++
 include/uapi/drm/drm_mode.h                    |  5 ++
 include/uapi/drm/exynos_drm.h                  |  5 ++
 include/uapi/drm/nouveau_drm.h                 |  6 ++
 include/uapi/drm/r128_drm.h                    |  2 +
 include/uapi/drm/radeon_drm.h                  |  5 ++
 include/uapi/drm/savage_drm.h                  |  2 +
 include/uapi/drm/sis_drm.h                     |  2 +
 include/uapi/drm/via_drm.h                     |  6 +-
 include/uapi/drm/vmwgfx_drm.h                  |  2 +-
 include/uapi/linux/dm-log-userspace.h          |  5 ++
 include/uapi/linux/hsi/hsi_char.h              |  7 ++-
 include/uapi/linux/netfilter_bridge/ebtables.h |  5 ++
 include/uapi/linux/nfsd/cld.h                  |  6 ++
 include/uapi/linux/rds.h                       |  4 ++
 include/uapi/linux/sctp.h                      |  4 ++
 include/uapi/scsi/scsi_bsg_fc.h                |  6 ++
 include/uapi/scsi/scsi_netlink.h               |  6 +-
 include/uapi/scsi/scsi_netlink_fc.h            |  5 ++
 include/uapi/sound/hdspm.h                     |  6 ++
 include/uapi/xen/gntalloc.h                    |  6 ++
 include/uapi/xen/gntdev.h                      |  6 ++
 scripts/headers.sh                             |  2 +-
 scripts/headers_compile_test.sh                | 84 ++++++++++++++++++++++++++
 scripts/headers_install.sh                     | 15 +++--
 26 files changed, 198 insertions(+), 16 deletions(-)
 create mode 100755 scripts/headers_compile_test.sh

-- 
2.1.0

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