Running Prince of Perisa via wine on a GLES host results in a buggy shader
vrend_hw_emit_rs: gles violation reported 1 "-007" Flatshade First 0
vrend_compile_shader: context error reported 1 "-007" Illegal shader 0
shader failed to compile
0:7(15): error: `winsys_adjust_y' redeclared
Edited by Gert Wollny