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meson: build with _ISOC11_SOURCE on OpenBSD

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Mesa builds with -std=c99 but uses timespec_get() a c11 function.
Build with _ISOC11_SOURCE for c11 visibility when -std is specified.
On linux c11 visibility comes from defining _GNU_SOURCE.

Fixes: e3a8013de8 ("util/u_queue: add util_queue_fence_wait_timeout")
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5630>
This commit is contained in:
Jonathan Gray 2019-12-06 14:30:14 +11:00 • committed by Marge Bot
parent 6e9c0661f8
commit f9a7e6e854
1 changed files with 2 additions and 0 deletions
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meson.build
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@ -949,6 +949,8 @@ elif host_machine.system() == 'windows'
else
pre_args += ['-D__MSVCRT_VERSION__=0x0700']
endif
elif host_machine.system() == 'openbsd'
pre_args += '-D_ISOC11_SOURCE'
endif
# Check for generic C arguments