After doing a update to head on the fpc sources i decided to to a new build_rtl.
Now it think it fails on:
d:/fpc4wii/bin/powerpc-wii/ppcppc.exe -Twii -Ppowerpc -XPpowerpc-eabi- -Xr -Fi..
/inc -Fi../powerpc -FE. -FU../../rtl/units/powerpc-wii -Twii -CX -XX -O2 -dpower
pc ../inc/cmem.pp
D:\fpc4wii\bin\powerpc-wii\powerpc-eabi-ar.exe: creating ..\..\rtl\units\powerpc
-wii\libpcmem.a
Bestand niet gevonden - *.*
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A file not found does not seem good in my opnion. Although i do not see something like a build error.