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Hi all, I have successfully compiled gcc v3.2.1, binutils v2.13 and newlib v1.10 on cygwin for Arm-elf. >From these programs I have compiled and run, on hardware, several programs doing math functions,etc. . I have come across problems when I try to do printf and scanf statements. My main problem is that from delving into newlib/libc/sys/arm/syscalls.c that printf and scanf require RDI or RDP i.e. Angel or Demon, installed on the chip, which I don't have. To get over this I have encoded a software UART using bit banging in assembly and I would like gcc to use this function by default for I/O from the chip. What is the easiest way to implement this? Is it by modifying syscalls.c or going in via libgloss? Below is my compile script Any help is appreciated Thanks, Dave cd $gccver ln -s ../$newlibver/newlib newlib ln -s ../$newlibver/libgloss libgloss cp /home/PCAdmin/script/t-arm-elf $src_root/$gccver/gcc/config/arm cd $src_root/BUILD/binutils && \rm -rf * ../../$binutilsver/configure \ --with-included-gettext --enable-interwork --with-cpu=arm7tdmi \ --target=$target --host=$host --build=$build --enable-multilib -disable-shared \ --prefix=$prefix -v > ../logs/$target-$binutilsver-configure.log 2>&1 # Make Binutils make -w all install > ../logs/$target-$binutilsver-make.log 2>&1 cd $src_root/BUILD/gcc && rm -rf * $src_root/$gccver/configure \ --with-newlib --without-headers --with-gnu-as --with-gnu-ld --enable-win32-registry \ --target=$target --prefix=$prefix --exec-prefix=$prefix --host=$host \ --enable-multilib --enable-interwork --disable-shared --enable-languages=c > ../logs/$target-$gccver-bootconf.log 2>&1 make all-gcc install-gcc > ../logs/$target-$gccver-bootmake.log 2>&1 cd $src_root/BUILD/newlib $src_root/$newlibver/configure --target=$target --prefix=$prefix > ../logs/$target-$newlibver-conf.log 2>&1 make all install > ../logs/$target-$newlibver-make.log 2>&1 cd $src_root/BUILD/gcc && rm -rf * $src_root/$gccver/configure \ --enable-languages=c,c++ \ --target=$target --host=$host --build=$build --enable-win32-registry \ --with-newlib \ --prefix=$prefix \ --exec-prefix=$prefix \ --enable-multilib --enable-interwork \ --with-gnu-as --with-gnu-ld -v > ../logs/$target-$gccver-fullconf.log 2>&1 make -w all-gcc install-gcc > ../logs/$target-$gccver-fullmake.log 2>&1 -- http://www.iol.ie ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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