[Rd] can't compile on OSX: unsetenv header issues

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Jan 8 18:47:28 CET 2007

On Mon, 8 Jan 2007, Seth Falcon wrote:

> Hi,
> A recent change has R failing to compile (for me) on ppc OSX 10.4.8 like this:
> ../../../../R-devel/src/main/datetime.c: In function `reset_tz':
> ../../../../R-devel/src/main/datetime.c:511: error: void value not ignored as it ought to be
> I suspect there is some sort of configure magic that needs to happen
> to get the POSIX compatible unsetenv on OSX.  Here's what I think is
> the relevant bit from stdlib.h, but I'm hoping someone with more OSX
> experience will recognize what needs to be done.

So do I, but does defining __DARWIN_UNIX03 at the head of that file (and
sysutils.c) solve this?

OSes who adopt pretty standard function names with non-standard 
implementations used to be commonplace, but I had rather hoped we had seen 
the last of this after Single Unix Standard, POSIX ....

> #if __DARWIN_UNIX03
> int      unsetenv(const char *) __DARWIN_ALIAS(unsetenv);
> #else /* !__DARWIN_UNIX03 */
> void     unsetenv(const char *);
> #endif /* __DARWIN_UNIX03 */
> + seth
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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