It's been over two years and the blender ebuilds keep filtering -march=pentium4 CFLAG, since the days of gcc-3.2. AFAIK there should be no problem anymore with that CFLAG. I just tried and it worked for me both compilation and the app (as well as yafray), but I compiled using gcc4. Might be worth trying with gcc-3.3.5 and 3.4, but most probably the results will be that the filter is no longer needed.
Works with gcc-3.4.4 as well. Thought I'd try it since I ran across this bug while trying to figure out why Blender wouldn't compile. Turns out that Blender will not compile if sdl is compiled without joystick support.
cflags issue solved, Chris please open another bug. (My libsdl is without joystick support...)
So you're compiling libsdl with the "nojoystick" use flag set and Blender still compiles?
please open another bug.
http://bugs.gentoo.org/show_bug.cgi?id=96387