Sorry for using again your time :)
Now build.sh fails this way:

#   compile  libg2c3/lnblnk_.so
/usr/src/../tools/bin/powerpc--netbsd-gcc -O2  -Werror    
-I/usr/src/gnu/lib/libg2c3/arch/powerpc  -DHAVE_CONFIG_H 
-DIEEE_COMPLEX_DIVIDE=1 -DIEEE_drem=1 -DRETSIGTYPE=void -DSTDC_HEADERS=1 
-DSkip_f2c_Undefs=1 -I/usr/src/gnu/dist/gcc/libf2c/libF77 
-I/usr/src/gnu/dist/gcc/libf2c/libF77/.. 
-I/usr/src/gnu/dist/gcc/libf2c/libI77 
-I/usr/src/gnu/dist/gcc/libf2c/libI77/.. 
-I/usr/src/gnu/dist/gcc/libf2c/libU77 
-I/usr/src/gnu/dist/gcc/libf2c/libU77/.. 
-I/usr/src/gnu/dist/gcc/libf2c/libU77/../libI77  -DAllow_TYQUAD   -nostdinc 
-isystem /usr/src/../obj/destdir.macppc/usr/include -c    -fPIC 
-DPIC /usr/src/gnu/dist/gcc/libf2c/libU77/lnblnk_.c -o lnblnk_.so.tmp
/usr/src/gnu/dist/gcc/libf2c/libU77/lnblnk_.c:38: internal compiler error: 
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.netbsd.org/Misc/send-pr.html> for instructions.

Fantastic! What does it mean?