Eric Lee / smarc-fsl-linux-kernel

10 Aug, 2020

1 commit

  • faabed295   kbuild: introduce hostprogs-always-y and userprogs-always-y ... Browse Code »

    To build host programs, you need to add the program names to 'hostprogs'
    to use the necessary build rule, but it is not enough to build them
    because there is no dependency.

    There are two types of host programs: built as the prerequisite of
    another (e.g. gen_crc32table in lib/Makefile), or always built when
    Kbuild visits the Makefile (e.g. genksyms in scripts/genksyms/Makefile).

    The latter is typical in Makefiles under scripts/, which contains host
    programs globally used during the kernel build. To build them, you need
    to add them to both 'hostprogs' and 'always-y'.

    This commit adds hostprogs-always-y as a shorthand.

    The same applies to user programs. net/bpfilter/Makefile builds
    bpfilter_umh on demand, hence always-y is unneeded. In contrast,
    programs under samples/ are added to both 'userprogs' and 'always-y'
    so they are always built when Kbuild visits the Makefiles.

    userprogs-always-y works as a shorthand.

    Signed-off-by: Masahiro Yamada
    Acked-by: Miguel Ojeda

    Masahiro Yamada
     

17 May, 2020

1 commit

  • 87ecdf4fc   samples: uhid: build sample program for target architecture ... Browse Code »

    This userspace program includes UAPI headers exported to usr/include/.
    'make headers' always works for the target architecture (i.e. the same
    architecture as the kernel), so the sample program should be built for
    the target as well. Kbuild now supports 'userprogs' for that.

    Add the entry to samples/Makefile to put this into the build bot
    coverage.

    I also added the CONFIG option guarded by 'depends on CC_CAN_LINK'
    because $(CC) may not provide libc.

    Signed-off-by: Masahiro Yamada
    Acked-by: Sam Ravnborg

    Masahiro Yamada
     

04 Feb, 2020

1 commit

  • 5f2fb52fa   kbuild: rename hostprogs-y/always to hostprogs/always-y ... Browse Code »

    In old days, the "host-progs" syntax was used for specifying host
    programs. It was renamed to the current "hostprogs-y" in 2004.

    It is typically useful in scripts/Makefile because it allows Kbuild to
    selectively compile host programs based on the kernel configuration.

    This commit renames like follows:

    always -> always-y
    hostprogs-y -> hostprogs

    So, scripts/Makefile will look like this:

    always-$(CONFIG_BUILD_BIN2C) += ...
    always-$(CONFIG_KALLSYMS) += ...
    ...
    hostprogs := $(always-y) $(always-m)

    I think this makes more sense because a host program is always a host
    program, irrespective of the kernel configuration. We want to specify
    which ones to compile by CONFIG options, so always-y will be handier.

    The "always", "hostprogs-y", "hostprogs-m" will be kept for backward
    compatibility for a while.

    Signed-off-by: Masahiro Yamada

    Masahiro Yamada
     

21 May, 2019

1 commit

18 Nov, 2017

1 commit

18 Jun, 2012

1 commit

  • 5148fa52a   HID: uhid: add example program ... Browse Code »

    This adds an example user-space program that emulates a 3 button mouse
    with wheel. It detects keyboard presses and moves the mouse accordingly.

    It register a fake HID device to feed the raw HID reports into the kernel.
    In this example, you could use uinput to get the same result, but this
    shows how to get the same behavior with uhid so you don't need HID parsers
    in user-space.

    Signed-off-by: David Herrmann
    Signed-off-by: Jiri Kosina

    David Herrmann