Re: [PATCH 00/16] kbuild: support 'userprogs' syntax

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Hi Masahiro

On Thu, Apr 23, 2020 at 04:39:13PM +0900, Masahiro Yamada wrote:
> 
> Several Makefiles use 'hostprogs' for building the code for
> the host architecture is not appropriate.
> 
> This is just because Kbuild does not provide the syntax to do it.
> 
> This series introduce 'userprogs' syntax and use it from
> sample and bpf Makefiles.
> 
> Sam worked on this in 2014.
> https://lkml.org/lkml/2014/7/13/154

I wonder how you managed to dig that up, but thanks for the reference.

Back then we would fail buiulding without any libc - you have solved
this nicely in this patch-set.

> 
> He used 'uapiprogs-y' but I just thought the meaning of
> "UAPI programs" is unclear.
> 
> Naming is one the most difficult parts of this.
> 
> I chose 'userprogs'.
> Anothor choice I had in my mind was 'targetprogs'.
> 
> If you can test this series quickly by
> 'make allmodconfig samples/'
> 
> When building objects for userspace, [U] is displayed.
> 
> masahiro@oscar:~/workspace/linux$ make allmodconfig samples/
>   [snip]
>   AR      samples/vfio-mdev/built-in.a
>   CC [M]  samples/vfio-mdev/mtty.o
...

> 
> 
> Masahiro Yamada (15):
>   Documentation: kbuild: fix the section title format
>   Revert "objtool: Skip samples subdirectory"
>   kbuild: add infrastructure to build userspace programs
>   net: bpfilter: use 'userprogs' syntax to build bpfilter_umh
>   samples: seccomp: build sample programs for target architecture
>   kbuild: doc: document the new syntax 'userprogs'
>   samples: uhid: build sample program for target architecture
>   samples: hidraw: build sample program for target architecture
>   samples: connector: build sample program for target architecture
>   samples: vfs: build sample programs for target architecture
>   samples: pidfd: build sample program for target architecture
>   samples: mei: build sample program for target architecture
>   samples: auxdisplay: use 'userprogs' syntax
>   samples: timers: use 'userprogs' syntax
>   samples: watchdog: use 'userprogs' syntax
Nice work!
All patches are:
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>

> 
> Sam Ravnborg (1):
>   samples: uhid: fix warnings in uhid-example
> 
>  Documentation/kbuild/makefiles.rst | 185 +++++++++++++++++++++--------
>  Makefile                           |  11 +-
>  net/bpfilter/Makefile              |  11 +-
>  samples/Kconfig                    |  26 +++-
>  samples/Makefile                   |   5 +-
>  samples/auxdisplay/Makefile        |  11 +-
>  samples/connector/Makefile         |  12 +-
>  samples/hidraw/Makefile            |   9 +-
>  samples/mei/Makefile               |   9 +-
>  samples/pidfd/Makefile             |   8 +-
>  samples/seccomp/Makefile           |  42 +------
>  samples/timers/Makefile            |  17 +--
>  samples/uhid/.gitignore            |   2 +
>  samples/uhid/Makefile              |   9 +-
>  samples/uhid/uhid-example.c        |   4 +-
>  samples/vfs/Makefile               |  11 +-
>  samples/watchdog/Makefile          |  10 +-
>  scripts/Makefile.build             |   5 +
>  scripts/Makefile.clean             |   2 +-
>  scripts/Makefile.userprogs         |  44 +++++++
>  20 files changed, 258 insertions(+), 175 deletions(-)
>  create mode 100644 samples/uhid/.gitignore
>  create mode 100644 scripts/Makefile.userprogs
> 
> -- 
> 2.25.1



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