sponge@spongetop:/usr/local/devkitPPC/projects/mupen64gc-read-only$ make
powerpc-gekko-gcc -I/usr/local/devkitPPC/include -g -O2 -Wall -DGEKKO -mcpu=750 -meabi -mhard-float  -fmodulo-sched -DCPU_SHUTDOWN -DSPC700_SHUTDOWN -DVAR_CYCLES -DSOUND -DNOASM -DNGC -DNOASM -DPIXEL_FORMAT=RGB565 -DM_PI=3.14159265359 -fno-exceptions -Wno-unused-parameter -pipe -DUSE_GUI -DSHOW_DEBUG -DPROFILE -DWII    -c -o main/rom_gc.o main/rom_gc.c
In file included from /usr/local/devkitPPC/include/ogc/gx.h:10,
                 from main/../gui/GUI.h:8,
                 from main/rom_gc.c:49:
/usr/local/devkitPPC/include/gctypes.h:24: error: redefinition of typedef 'u32'
main/ROM-Cache.h:10: error: previous declaration of 'u32' was here
In file included from /usr/local/devkitPPC/include/ogc/gx.h:13,
                 from main/../gui/GUI.h:8,
                 from main/rom_gc.c:49:
/usr/local/devkitPPC/include/ogc/gu.h:23:1: warning: "M_PI" redefined
<command-line>: warning: this is the location of the previous definition
main/rom_gc.c: In function 'rom_read':
main/rom_gc.c:164: warning: passing argument 1 of 'ROMCache_read' from incompatible pointer type
main/rom_gc.c:219: warning: pointer targets in passing argument 2 of 'strcpy' differ in signedness
make: *** [main/rom_gc.o] Error 1