Re: [dpdk-dev] [PATCH v2 1/1] build: enable BSD features visibility for FreeBSD

[Thomas Monjalon <thomas@monjalon.net>]

Marcin, please remind to use --in-reply-to to have next versions
in the same thread. Thanks

Bruce, Konstantin, Adrien, any opinion about this patch?


14/05/2019 16:04, Marcin Smoczynski:
> When a component uses either XOPEN_SOURCE or POSIX_C_SOURCE macro
> explicitly in its build recipe, it restricts visibility of a non POSIX
> features subset, such as IANA protocol numbers (IPPROTO_* macros).
> Non standard features are enabled by default for DPDK both for Linux
> thanks to _GNU_SOURCE and for FreeBSD thanks to __BSD_VISIBLE. However
> using XOPEN_SOURCE or POSIX_(C_)SOURCE in a component causes
> __BSD_VISIBLE to be defined to 0 for FreeBSD, causing different feature
> sets visibility for Linux and FreeBSD. It restricts from using IPPROTO
> macros in public headers, such as rte_ip.h, despite the fact they are
> already widely used in sources.
> 
> Add __BSD_VISIBLE macro specified unconditionally for FreeBSD targets
> which enforces feature sets visibility unification between Linux and
> FreeBSD.
> 
> Add single -D_GNU_SOURCE to config/meson.build as a project argument
> instead of adding separate directive for each project subtree.
> 
> This patch solves the problem of build breaks for [1] on FreeBSD [2]
> following the discussion [3].
> 
> [1] https://mails.dpdk.org/archives/dev/2019-May/131885.html
> [2] http://mails.dpdk.org/archives/test-report/2019-May/082263.html
> [3] https://mails.dpdk.org/archives/dev/2019-May/132110.html
> 
> Signed-off-by: Marcin Smoczynski <marcinx.smoczynski@intel.com>