Re: Option not supported error in GCC cross compilation

[Kai Ruottu <kai dot ruottu at wippies dot com>]

Xiao-lei Cui<climber.cui@gmail.com>  writes:
> > I am building a coff-gcc to fulfill some requirements at work.
> > The tool chain we are trying to develop based on GCC needs to
> > support coff format on SPARC V7/V8.

This requirement puts one to think the ESA/ESTEC ERC32 CPU, the
commercial "XGC" GCC maybe used COFF with SPARC. It is hard to
remember any other toolchain where coff-sparc could have been
used as the default format...

> > I forgot to mention that the version I am trying to build is
> > GCC-3.4.6, and the native GCC on my Linux is version 4.1.

The gcc-3.4.6 doesn't support 'sparc-coff' as target, it should support
'sparclite-coff' but that will fail because of a bug. The earlier 3.3.6
too :(

> Ian Lance Taylor writes:
>
> As far as I know gcc 3.4.6 should support sparc-coff.

Probably 'sparc-coff' was never supported in the FSF GCC
sources :(

Generally the clause "needs to support coff format on SPARC V7/V8"
would require more elaboration...

The ESA/ESTEC ERC32 CPU ("radiation hardened") used RTEMS, so the
usual $target name was 'sparc-rtems', not 'sparc-aout', 'sparc-coff'
or 'sparc-elf', although one, two or all three object formats were
supported in a SPARC/RTEMS toolchain, for instance :

[root@localhost bin]# ./objdump --help
Usage: ./objdump <option(s)> <file(s)>
 Display information from object <file(s)>.
 At least one of the following switches must be given:
  -a, --archive-headers    Display archive header information

<snip>

./objdump: supported targets: elf32-sparc a.out-sunos-big coff-sparc 
elf32-little elf32-big srec symbolsrec verilog tekhex binary ihex
./objdump: supported architectures: sparc sparc:sparclet sparc:sparclite 
sparc:v8plus sparc:v8plusa sparc:sparclite_le sparc:v9 sparc:v9a 
sparc:v8plusb sparc:v9b

with a 'sparc-rtems' targeted 'objdump'...

With the 'sparc-coff' your possibility to succeed may be miserable,
with 'sparc-rtems' much, much better...  IF your real goal is the
ERC32 "Sparc for Space". For instance you can download prebuilt
toolchains from Jiri Gaisler, like :

ftp://gaisler.com/gaisler.com/rcc/bin/linux/sparc-rtems-4.6.5-gcc-3.2.3-1.0.19-linux.tar.bz2
ftp://gaisler.com/gaisler.com/rcc/bin/linux/sparc-rtems-4.8-gcc-4.2.4-1.1.2-linux.tar.bz2
ftp://gaisler.com/gaisler.com/rcc/bin/linux/sparc-rtems-4.10-gcc-4.3.3-1.1.99.12a-linux.tar.bz2

with gcc-3.2.3, gcc-4.2.4 or gcc-4.3.3, for Linux/x86 host :

[root@localhost bin]# cd /opt/rtems-4.6/bin
[root@localhost bin]# ls
cklength               sparc-rtems-c++filt  sparc-rtems-nm
ddd                    sparc-rtems-cpp      sparc-rtems-objcopy
dddx                   sparc-rtems-g++      sparc-rtems-objdump
eolstrip               sparc-rtems-gcc      sparc-rtems-ranlib
install-if-change      sparc-rtems-gccbug   sparc-rtems-readelf
mkprom-erc32           sparc-rtems-gcov     sparc-rtems-size
packhex                sparc-rtems-gdb      sparc-rtems-strings
sparc-rtems-addr2line  sparc-rtems-gdbtui   sparc-rtems-strip
sparc-rtems-ar         sparc-rtems-gdb52    unhex
sparc-rtems-as         sparc-rtems-ld
sparc-rtems-c++        sparc-rtems-mkprom
[root@localhost bin]# ./sparc-rtems-gcc -v
Reading specs from ./../lib/gcc-lib/sparc-rtems/3.2.3/specs
Configured with: ../gcc-3.2.3/configure --build=i686-pc-linux-gnu 
--host=i686-pc-linux-gnu --target=sparc-rtems --with-gnu-as 
--with-gnu-ld --with-newlib --verbose --with-system-zlib --disable-nls 
--enable-version-specific-runtime-libs --enable-threads=rtems 
--prefix=/opt/rtems-4.6 --enable-languages=c,c++,ada
Thread model: rtems
gcc version 3.2.3 (OAR Corporation 
gcc-3.2.3-20040420/newlib-1.11.0-20030605-4)