Re: [Xen-devel] [PATCH] libxl: build fix

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Christoph Egger writes ("Re: [Xen-devel] [PATCH] libxl: build fix"):
> On NetBSD, the SIG* defines are in <sys/signal.h> which is just
> included by <signal.h>
> On NetBSD, both works.

The correct way to discover what the right #include is is not to go on
a wild goose chase through headers.  It is to read appropriate
documentation, such as SuSv3:
  http://www.opengroup.org/onlinepubs/009695399/basedefs/signal.h.html
Every function or symbol that's in SuS has next to its description a
statement of what header file(s) are needed.

> But you're right, the portable fix is the prefered one.

It's not just "portable", it is not broken.  The NetBSD developers
would be quite entitled to make <sys/signal.h> go away, or not contain
these definitions any more.  I doubt they promise not to.

Ian.

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