[Mesa-dev] [Bug 24318] Fix building of GLSL demos which use M_PI when M_PI is not defined by math.h

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=24318

--- Comment #14 from Jon TURNEY <jon.turney at dronecode.org.uk> 2010-04-26 11:53:49 PDT ---
(In reply to comment #11)
> Attached a couple of patches with an effort to do this better.

Refreshed patches for git master

> As written, this falls back to explicitly defining M_PI using -D o the compiler
> command line if it can't make math.h define it.  This probably isn't a good
> idea.

Changed this so ./configure will fail with an error if we can't work out how to
get math.h to define M_PI

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