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The MBX860 and MBX821 are NOT based upon the i860 processor. They are based upon the MPC860/MPC821 processors, which are part of the powerpc family from IBM/Motorola. The GCC target for this family is 'powerpc-eabi'. Scott -----Original Message----- From: crossgcc-owner@sourceware.cygnus.com [mailto:crossgcc-owner@sourceware.cygnus.com]On Behalf Of Charles-Antoine Gauthier Sent: Friday, May 19, 2000 1:06 PM To: Kai Ruottu; crossgcc@sourceware.cygnus.com; Sreedhar Sampath Subject: Re: i860 Target Hum... I am using binutils and gcc to build i860 ELF images for the MBX860 and MBX821. Perhaps you are right that the i860-*-elf target is broken. I specified --target=powerpc-rtems during configure. As far as I can tell, there is absolutely nothing specific to RTEMS in this configuration other than the build of a dummy crt0.o whose source is contained in newlib. You need this dummy crt0.o for the configure tests that check whether the compiler can create executable. This dummy crt0.o should never be used in linking real embedded applications. You should get the latest patches to gcc and binutils from ftp://ftp.oarcorp.com/pub/rtems/betas/rtems-4.5.0-beta/c_tools/source/. Rename the target if you don't like powerpc-rtems. Notes: Use the current snapshot of the binutils. The linker in 2.9.1 is buggy and may overlap some output sections. This problem is known and is documented in the binutils email archive. I had to specify t-ppc rather than t-ppcasm in the configure script for the powerpc-rtems target. The t-ppcasm file tries to build all the multilib variants of the libraries, which failed for me on the lin variant. Besides, I only need the big-endian default and nof (soft-float) variants. Why clutter up disk space and waste time building unnecessary libraries. Kai Ruottu wrote: > > Sreedhar Sampath wrote: > > > > I was wondering if any one of you could tell me if gcc has a cross > > compiler which could compile for i860 machine. > > The current release, gcc-2.95.2 has support for 'i860-*-sysv3*' > and 'i860-*-sysv4*', which you can equalize with 'i860-*-coff' > and 'i860-*-elf', if aiming at an embedded target. So you can > build a compiler which produces i860 assembly code, either for > COFF or ELF... > > But you probably are interested in the things handling the stuff > AFTER the compiling, ie assembling and linking... Unfortunately > these are the missing/unimplemented components now. The 'binutils' > subdir will be built for 'i860-coff' or 'i860-elf', but the 'gas' > and 'ld' subdirs will not, if trying either target with recent > binutils sources. > > The 'gas/config/tc-i860.*' do exist, so in some time someone was > adding the gas-support into GNU binutils, but just "enabling" the > 'i860-*-coff' or 'i860-*-elf' by adding these entries and their > binary format into 'gas/configure', will not work immediately. I > know, I tried... The 'tc-i860.c' has things which are related to > the 'aout' binary format (it needs defines from the 'aout_gnu.h'), > but then there aren't things like 'i860-*-aout' in the config > files... > > So the 'i860-coff' and 'i860-elf' targets need someone to port > the GNU as and ld for them... Perhaps this has been (partly) done, > but the results are lurking somewhere else (than in the GNU binutils > sources). Or using GCC and GNU binutils with the native assembler > and linker on 'i860-sysv3' and 'i860-sysv4' machines has been the > only need, and that being enough, so no work done to get 'gas' and > 'ld' work for i860-coff/elf... > > Cheers, Kai > > ------ > Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ > Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com -- Charles-Antoine Gauthier Institute for Information Technology Institut de technologie de l'information National Research Council of Canada Conseil national de recherches du Canada ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com
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