Re: [RFCv2 00/40] Building DPDK with meson and ninja

[Luca Boccassi <luca.boccassi@gmail.com>]

On Mon, 2017-08-14 at 10:51 +0100, Bruce Richardson wrote:
> Following on from previous RFC [http://dpdk.org/dev/patchwork/patch/2
> 5104/]
> here is a second draft implementation for building DPDK with meson
> and
> ninja. While still not building all of DPDK, and needing patch
> cleanup so
> that patches don't overwrite previous work, it is more complete in
> many
> ways than the previous version and includes:
> 
> * dynamic build configuration e.g. building pcap driver only if pcap
> is
>   found, only build af_packet if the target is linux, and only
> building QAT
>   and openssl crypto drivers if libcrypto is found
> * support for pmdinfo inside the PMDs(for shared builds) and binaries
> (for
>   static builds)
> * generalized/standardized way of building libs and drivers, though
> the
>   drivers code still needs generalization at the driver, rather than
>   driver-class level.
> * support for having a pkgconfig file for DPDK on install, and
> helloworld
>   and l2fwd can be built using the pkgconfig info (via make, not
> ninja)
> * support for library versions
> * an implementation for FreeBSD as well as Linux
> * all libraries are included in the build, as well as a number of
> NIC,
>   crypto, and mempool drivers
> * the igb_uio kernel module is build via the kernel Kbuild system as
> part
>   of a meson/ninja DPDK build
> 
> there is still plenty to do on this, but please review and test it
> out.
> I've kept the patches split so that the evolution of the work is a
> bit
> clearer than having it all send in a monolithic patch. All feedback
> welcome. I recommend one uses the latest meson release for this,
> though the
> minimum version supported should be v0.4.
> 
> I've tested static and dynamic builds with clang and gcc on Fedora
> 26, and
> done test builds on FreeBSD 11 with clang too. Build with other
> compilers
> and on other OS's may have issues, so YMMV.
> 
> To do a basic build, using gcc and with shared libs, in a folder
> called "gcc-build":
> 
> 	user@host:dpdk$ meson gcc-build
> 	....
> 	user@host:dpdk$ cd gcc-build
> 	user@host:gcc-build$ ninja
> 	user@host:gcc-build$ sudo ninja install
> 
> To do a build with clang, using static libs:
> 
> 	user@host:dpdk$ CC=clang meson --default_library=static clang-
> build
> 	....
> 	user@host:dpdk$ cd clang-build
> 	user@host:clang-build$ ninja
> 	user@host:clang-build$ sudo ninja install
> 
> Other options can be adjusted by running "mesonconf" in the build
> directory, i.e. gcc-build or clang-build in the examples above.

Hi Bruce,

This is great, thank you!

I'll try to give this set a run in the Debian context as soon as I have
time.

It's also great to see a pkg-config file!

I haven't gone through the diff yet, but do you think it would be
possible, now or later on, to add the option to install architecture-
specific headers in a different directory than the arch-independent
ones?

This is in the context of multi-arch: on Debian and Ubuntu there's a
lot of effort to make sure libraries built on different architectures
are co-installable. Which means either the files must be identical, or
in arch-specific paths (eg: /usr/include/x86_64-linux-gnu/ and
/usr/lib/x86_64-linux-gnu/).

-- 
Kind regards,
Luca Boccassi