Hi all I'm trying to build an cross compiling environment on my i386 PC following the follow steps: ===> Binutils ./configure --target=arm-gnu-linux make make install Bootstrap GCC mkdir _build_ cd _build_ ../gcc-4.1.1/configure --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --target=arm-gnu-linux --disable-shared --disable-threads --enable-languages=c --with-newlib --with-gnu-as --with-gnu-ld --without-headers make all-gcc make install-gcc Glibc mkdir _build_ cd _build_ CC=arm-gnu-linux-gcc ../glibc-2.3.6/configure --host=arm-gnu-linux --target=arm-gnu-linux --enable-add-ons --with-headers=/usr/local/arm-gnu-linux/include --prefix=/usr/local/arm-gnu-linux --disable-shared --disable-check-abi --without-tls <=== But there's an error occured: checking for forced unwind support ... no configure: error: forced unwind support is required I only have an bootstrap gcc so I can't build the libunwind library. How can I solve this problem? Thanks.