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problems in building tool chain


hi! 
This is the first time i am using for the first time. i building it on a
linux 8 host for target arm-elf.
i have followed all the instructions as given in the 
"http://ecos.sourceware.org/build-toolchain.html"; page. The only
difference is that i ahve not included the gdb file " gdb-5.3.tar.bz2".
but i getting the following error while compiling.
-------------------------------------------------------------
 make[3]: Leaving directory `/tmp/build/gcc/arm-elf/libstdc++-v3/libio'
Making all in libmath
make[3]: Entering directory
`/tmp/build/gcc/arm-elf/libstdc++-v3/libmath'
/bin/sh ../libtool --tag CC --mode=compile /tmp/build/gcc/gcc/xgcc
-B/tmp/build/gcc/gcc/ -B/gnutools/arm-elf/bin/ -B/gnutools/arm-elf/lib/
-isystem /gnutools/arm-elf/include -DHAVE_CONFIG_H -I.
-I/src/gcc-3.2.1/libstdc++-v3/libmath -I..      -O2 -g -O2 -c
/src/gcc-3.2.1/libstdc++-v3/libmath/stubs.c
/tmp/build/gcc/gcc/xgcc -B/tmp/build/gcc/gcc/ -B/gnutools/arm-elf/bin/
-B/gnutools/arm-elf/lib/ -isystem /gnutools/arm-elf/include
-DHAVE_CONFIG_H -I. -I/src/gcc-3.2.1/libstdc++-v3/libmath -I.. -O2 -g
-O2 -c /src/gcc-3.2.1/libstdc++-v3/libmath/stubs.c -o stubs.o
/src/gcc-3.2.1/libstdc++-v3/libmath/stubs.c:30:18: math.h: No such file
or directory
make[3]: *** [stubs.lo] Error 1
make[3]: Leaving directory `/tmp/build/gcc/arm-elf/libstdc++-v3/libmath'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/build/gcc/arm-elf/libstdc++-v3'
make[1]: *** [all-recursive-am] Error 2
make[1]: Leaving directory `/tmp/build/gcc/arm-elf/libstdc++-v3'
make: *** [all-target-libstdc++-v3] Error 2
make: Leaving directory `/tmp/build/gcc'
-----------------------------------------------------------

Do i have to copy certain files manually?

thanks 
sai
 




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