Comment 13 for bug 992124

> Patch from comment #10 tested on successfully on Windows XP

Oops - seems that I made quite a mess with what I attached earlier: that patch from comment #10 includes additional changes which I didn't plan to propose for trunk (at least not as part of this report about clang support)…

Attaching a minimal version (changes unrelated to clang support removed) for trunk r12121:
- configure.ac (workaround to not misread clang as GCC <= 3.0
- Samuel's patches to 'src/2geom' and 'src/color-profile.cpp'

Note: the compiler detection in configure.ac needs a proper fix (the changes as described in comment #2 are just a workaround, not a real fix).