matplotlib-devel Mailing List for matplotlib

Oops; evidently tex_demo.py is supposed to *create* the .png
file---my bad. I was just having permission problems!!
Sorry for the distraction.
-Tom

Hi folks,
Just checked out mpl from CVS; tex_demo.py fails because it
cannot find tex_demo.png, which I know was in there a day or
so ago. Browsing on the SourceForge CVS portal, it isn't
shown there, so I don't think my CVS ignorance is behind this.
But it may be---let me know if you think so!
-Tom

Jouni K Seppanen <jk...@ik...> writes:
> #include <math.h>
> template<typename T> int mpl_isnan(T arg) { return isnan(arg); }
> #include <cmath>
Nah, that also effectively assumes the GNU libraries. Here's a better
idea:
#include <math.h>
int mpl_isnan_f(float f) { return isnan(f); }
int mpl_isnan_d(double f) { return isnan(f); }
int mpl_isnan_ld(long double f) { return isnan(f); }
Compile this as C(99), not C++, and put
extern "C" {
 int mpl_isnan_f(float);
 int mpl_isnan_d(double);
 int mpl_isnan_ld(long double);
}
in the C++ file.
-- 
Jouni

Tom Loredo <lo...@as...> writes:
> I'll try reinstalling the latest TeTeX; if anyone else has had such
> problems, I'd be grateful to know how you fixed them.
FWIW, I've had no problems with Gerben Wierda's i-Installer version of
TeX described at <http://ii2.sourceforge.net/tex-index.html>. I found
the installer program somewhat idiosyncratic, but once you figure that
out, you get a really nice TeX installation.
-- 
Jouni

Andrew Straw <str...@as...> writes:
> extern "C" {
> int isnan(double);
> }
>
>>Apparently, the upshot is that isnan is a C99 feature and C++ does not
>>incorporate C99.
>>
> So, does that mean the above should work on most C++ compilers? (Do
> they implement C99 mode when in extern "C" mode?) 
What extern "C" does is it disables the C++ name-mangling so you can
refer to C functions. The presence of isnan is a header/library issue,
and apparently the cmath header file in some systems makes sure to
hide isnan. It seems that C99 defines an isnan _macro_, and the above
is assuming that an isnan _function_ exists in the library. The isnan
manual page on OS X states:
| HISTORY
| 3BSD introduced isinf() and isnan() functions, which accepted double
| arguments; these have been superseded by the macros described above.
I don't know how widespread these functions are. GNU libc and OS X
have them, and all the world's either Linux or a Mac, right? :-)
I think we could use the system's isnan macro in a fairly clean way by
performing the following dance (untested, and I don't have an OS X
10.3 system to test on):
#include <math.h>
template<typename T> int mpl_isnan(T arg) { return isnan(arg); }
#include <cmath>
Is it possible in distutils to do autoconf-style compilation tests at
configuration time? 
-- 
Jouni

Andrew,
Thanks for the new patch. It works fine on OS 10.3.9/Python 2.4,
as far as I can tell. Cool!
My tex problem that originally motivated
the reinstall appears to be due to problems with my TeTeX 
install (dvipng is not finding mktex.opt and thus creating
blank PNGs, though ). I'll try reinstalling the latest TeTeX; if
anyone else has had such problems, I'd be grateful to know how
you fixed them.
-Tom
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