SSE+O2 = floats return NaN

[jK]

Current svn crashs for me with optimize=2 and fpmath=sse.
One of those deactivated and everything runs fine.
The crash happens in QuadField.h line 58, but is introduced in CGameHelper::GuiTraceRay, the start & dir float3s contain NaN
values for some strange reason and further checking showed
that a lot of float operations just return NaN.

GCC 3.4.5 (MingW)
AthlonXp (with sse support)

just checked: it doesn't crash with march=athlon-xp, so it is an issue with i686+SSE+O2

PS: For a very strange reason bibim's builds don't crash o_O

[Auswaschbar]

You should not use gcc versions prior to 4.

[imbaczek]

yes, use at least gcc 4.2 (mingw release candidate) or tdragon's gcc 4.3.

[jK]

k finally found a working gcc4 build for windows :)