[avr-libc-dev] Problem building avr-gcc-4.3.1

[Rolf Ebert]

Building a cross compiler on Windows from the 4.3.1-RC sources, I get 
the following error:

...
TARGET_CPU_DEFAULT="" \
        HEADERS="auto-host.h ansidecl.h config/i386/xm-mingw32.h" 
DEFINES="" \
        /bin/sh ../../gcc-4.3.1-RC-20080523/gcc/mkconfig.sh bconfig.h
gcc -c   -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes 
-Wold-style-definition -Wmissing-format-attribute -pedantic 
-Wno-long-long -Wno-variadic-macros     -Wno-overlength-strings 
-DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I../../gcc
-4.3.1-RC-20080523/gcc -I../../gcc-4.3.1-RC-20080523/gcc/build 
-I../../gcc-4.3.1-RC-20080523/gcc/../include 
-I../../gcc-4.3.1-RC-20080523/gcc/../libcpp/include
 -I../../gcc-4.3.1-RC-20080523/gcc/../libdecnumber 
-I../../gcc-4.3.1-RC-20080523/gcc/../libdecnumber/dpd -I../libdecnumber 
   -o build/genmodes.o ../../gcc-4.3.1-RC-20080523/gcc/genmodes.c
C:/DOKUME~1/Rolf/LOKALE~1/Temp/ccuCqQPe.s: Assembler messages:
C:/DOKUME~1/Rolf/LOKALE~1/Temp/ccuCqQPe.s:2: Fatal error: unrecognized 
.section attribute: want a,w,x,M,S,G,T
make[2]: *** [build/genmodes.o] Error 1
make[2]: Leaving directory 
/k/Data/Development/gcc-cvs/build-avr-gcc-4.3.1-RC-20080523/gcc-obj/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory 
`/k/Data/Development/gcc-cvs/build-avr-gcc-4.3.1-RC-20080523/gcc-obj'
make: *** [all] Error 2


$ as -v
GNU assembler version 2.18.50 (i686-pc-mingw32) using BFD version (GNU 
Binutils) 2.18.50.20071123

Did someone see that already?  Any hint what might be causing it?

   Rolf