Link problem with sparc64-elf newlib: crt0 incompatible

[Marco Zandonadi <marco_zandonadi at yahoo dot com>]

Hello,
I'm building a gnu cross toolchain for embedded
use and I ran into a problem with newlib and the
target linker. The host is a pentium running Linux RH8
and the target is sparc64-elf.

I downloaded and built successfully the following
three packages:

1) binutils 2.14
Here's the configure command:
../binutils-2.14/configure \
  --host=i686-linux-elf \
  --target=sparc64-elf \
  --prefix=/usr/local/sparc64tools \
  --disable-nls \
  -v

2) gcc 3.3.3
Here's the configure command:
../gcc-3.3.3/configure \
  --host=i686-linux-elf \
  --target=sparc64-elf \
  --prefix=/usr/local/sparc64tools \
  --enable-languages="c" \
  --without-headers \
  --with-newlib \
  --enable-thread=single \
  --disable-shared \
  --disable-nls \
  -v

3) newlib 1.12.0
I had to patch four .S files in libgloss/sparc to get
rid of an assembly error: I added the following two
lines to all four .S files.
  .register %g2,#scratch
  .register %g3,#scratch
Here's the configure command:
../newlib-1.12.0/configure \
  --host=i686-linux-elf \
  --target=sparc64-elf \
  --prefix=/usr/local/sparc64tools \
  -v


After building the above three packages successfully I
tried compiling a simple hello.c program using the
cross toolchain and I got an error about crt0.o being
incompatible:

[root@localhost root]# sparc64-elf-gcc -T
/root/bsd/newlib-1.12.0/libgloss/sparc/ex930.ld
hello.c
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/bin/ld:
skipping incompatible
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/lib/crt0.o
when searching for crt0.o
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/bin/ld:
skipping incompatible
/usr/local/sparc64tools/sparc64-elf/bin/../lib/crt0.o
when searching for crt0.o
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/bin/ld:
cannot find crt0.o
collect2: ld returned 1 exit status


It seems that the linker thinks that crt0.o is not
compatible with the generated .o file. So I used
sparc64-elf-objdump to verify that they are the same
format:
[root@localhost root]# sparc64-elf-gcc -c hello.c
[root@localhost root]# sparc64-elf-objdump -p hello.o 
hello.o:     file format elf64-sparc
[root@localhost root]# sparc64-elf-objdump -p
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/lib/crt0.o
/usr/local/sparc64tools/lib/gcc-lib/sparc64-elf/3.3.3/../../../../sparc64-elf/lib/crt0.o:
    file format elf64-sparc
 
So it seems that both files are the same format.

Any help getting rid of this incompatibile format
problem would be much appreciated.

Marco


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