Re: [Plplot-devel] Cygwin and MinGW testing requested of the test tarball

[Alan W. I. <ir...@be...>]

On 2006-04-27 12:58+1000 Andrew Roach wrote:
> [Alan said:]
>> [...] In contrast, the 
>> MinGW
>> problem is more severe, and there is some general problem (perhaps similar
>> to the previous sed issue) keeping Andrew from even building the
>> PLplot-related part of the dyn-drivers build.
>
> It could still be the same problem, but with MingW just catching it a little 
> earlier than Cygwin. With MingW there are always warning messages which 
> scroll past when you do a compile about "not allowing linking to dynamic 
> libraries because windows doesn't allow undefined symbols, so it will 
> substitute real symbols instead" or words to that effect. Because Cygwin has 
> a number of extra compatibility layers in the form of add-on libraries for 
> things like POSIX support, the resolution of those undefined symbols might 
> not be happening until run time (then failing) whereas with MingW it might be 
> getting caught during linking.

I believe the --no-undefined option (used for all our library and
device-driver plug-in builds as far as I know) is supposed to deal with the
specific issue you mentioned, but in general you could be correct; it could
be the same problem on both systems manifesting itself in various ways
rather than some extra MinGW problem such as the one I speculated about
above.  Anyhow, we'll know a lot more post-release when there should be some
time to look at all the details of what is going wrong.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the
Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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Linux-powered Science
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