MapServer and C math functions

[Paul G. Allen]

"Paul G. Allen" wrote:

> Stephen Lime wrote:
>
> > Hmmm... Probably just pow, cos/acos, and sin/asin. Probably have more
> > effect in the Proj and freetype libraries.
> >
>
> Then the faster math library will definitely help these portions of mapserv. These
> are some of the slowest functions listed (and as a rule should always be avoided if
> possibly when code speed is an issue).

I couldn't get PROJ.4 to compile with the Compaq math library, but everything else did.
PROJ.4 wants to use __atan2() and the Compaq library only contains atan2(). I noticed
that libm (the Linux math library) contains both __atan2() and atan2(). I thought there
was a compiler switch that would remove leading "_" from library function names but I
couldn't find it. Maybe I was thinking of another compiler?

>
>
> >
> > BTW Did you try recompiling mapserv without your pointer mods after fixing
> > egcs. Seems strange not to allow int *, yet char * still works. I did talk to the
> > shapelib author and he had compiled his stuff on an alpha, but not with linux
> > worked without any mods.
> >
>
> I could easily do this. I will be recompiling anyway to try the Compaq math library
> and when you release another version of mapserv. It's simple enough to modify the
> header file to force POINTER = (int).

Tonight I will look at compiling again without the POINTER mod and also see if I can
track down the labeling problem. I was thinking, the labeling problem is similar to the
one that you fixed a version or two ago (another 3.3 alpha) where my Field Unit labels
would crash the CGI if I tried to display too many of them. If the map only has a couple
streets, streams, or whatever displayed, then the labels work fine. Any more and it
crashes with an error. Again, this is only on the Alpha.

PGA