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Jeff: I think this is a great idea, if you stick with the default linker script as it is now. I really like that newlib & company work out-of-the-box for the ARM Evaluator7T platform. Makes it an easy way to introduce someone to GNU. Cheers! b.g. On Thu, Feb 06, 2003 at 12:08:08PM -0500, J. Johnston wrote: > Dave, > > From the newlib/libgloss side, I have been thinking about this and I > propose that newlib adds a configuration option that tells newlib not to > supply low-level syscalls. This would allow you to build newlib without > the RDI/RDP syscalls. You should then place your new code > in the libgloss/arm directory and build a separate library, crt0, and ld > script which specifies both your library and your crt0. You can then > use the compiler -T option to specify your ld script. > > The configuration options solves a long-standing problem regarding older > platforms that put the syscall code in newlib and it really should be > in libgloss. We could copy the existing code over to libgloss and eventually > remove the problem by syncing up a default ld script with the compiler folks. > > -- Jeff J. > > David Mc Kenna wrote: > > 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 > -- Bill Gatliff Embedded systems and Free Software. Yea, it *is* all that! http://billgatliff.com ------ 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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