Re: [dpdk-dev] [PATCH] build: add meson.build for kni kernel module

[Luca Boccassi <bluca@debian.org>]

On Fri, 2018-10-12 at 15:09 +0100, Bruce Richardson wrote:
> On Thu, Oct 11, 2018 at 08:46:29PM +0100, Luca Boccassi wrote:
> > A Kbuild is also included to allow users to use DKMS natively
> > without
> > additional code.
> > 
> > Signed-off-by: Luca Boccassi <bluca@debian.org>
> > ---
> > build-tested on debian sid am64
> > 
> >  kernel/linux/kni/Kbuild      |  8 ++++++
> >  kernel/linux/kni/meson.build | 51
> > ++++++++++++++++++++++++++++++++++++
> >  kernel/linux/meson.build     |  2 +-
> >  3 files changed, 60 insertions(+), 1 deletion(-)
> >  create mode 100644 kernel/linux/kni/Kbuild
> >  create mode 100644 kernel/linux/kni/meson.build
> > 
> 
> I get a couple of errors building this on Fedora 28. First problem is
> that
> I get a compilation error for a missing rte_fifo.h. The fix for that
> error
> is to ensure the current dir is on the include list:
> 
>                 ' -I' + meson.build_root() +
> +               ' -I' + meson.current_source_dir() +
>                 ' -I' + meson.current_source_dir() + '/ethtool/ixgbe'
> +
> 
> Then I hit a second error, where the compile fails because the output
> directory for the ethdev files does not exist. 
> 
> Fatal error: can't create /home/bruce/dpdk-clean/build-gcc-
> static/kernel/linux/kni/ethtool/ixgbe/ixgbe_ethtool.o: No such file
> or directory
> make[1]: *** [scripts/Makefile.build:318: /home/bruce/dpdk-
> clean/build-gcc-
> static/kernel/linux/kni/ethtool/ixgbe/ixgbe_ethtool.o] Error 2
> 
> I haven't fixed this, but I think the easiest fix is probably to
> split the
> file lists so that each file is listed in a meson.build in its own
> subdirectory. Then using subdir to build up the file list rather than
> having it all at one gom should cause meson to create the
> subdirectory
> structure in the build directory.
> There may be other, better solutions, though.
> 
> /Bruce

Hi,

Interesting, I guess it's down to differences between the kernel
makefiles in Debian and Fedora? Although the include one is strange.

I've sent a v2 with your suggestions, please give it a run when you've
got a sec.

-- 
Kind regards,
Luca Boccassi