Build problem - %rdx used with `l' suffix

[Tarl Neustaedter]

Back in september, there was a message about a fix to romcc for AMD64,
which would cure the error:

/tmp/ccLriZXb.s:243: Error: Incorrect register `%rdx' used with `l' suffix

As it happens, I'm getting that error building arima/hdama from
an Opteron (it was suggested as a good starting point for a working
prom that I could branch off from). It looks like the code in romcc
has changed enough that the fix doesn't directly apply, and there was
some doubt as to whether that was the necessary fix. Is there something
else I should be doing to avoid this error?

For the record, my versions of gcc, as and linux:

wgs94-112% gcc -v
Reading specs from /usr/lib/gcc-lib/x86_64-redhat-linux/3.2.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --host=x86_64-redhat-linux
Thread model: posix
gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)

wgs94-112% as -v
GNU assembler version 2.14.90.0.4 (x86_64-redhat-linux) using BFD version 2.14.90.0.4 20030523

wgs94-112% uname -a
Linux wgs94-112 2.4.21-4.ELsmp #1 SMP Fri Oct 3 17:32:58 EDT 2003 x86_64 x86_64 x86_64 GNU/Linux

Tarl Neustaedter  writes:
> Back in september, there was a message about a fix to romcc for AMD64,
> which would cure the error:

-m32 if you are compiling on a 64bit system.  I think that is the
problem.

So far LinuxBIOS is 32bit, and this is certainly a 32bit versus 64bit
issue.  I don't recognize the symptoms.
> /tmp/ccLriZXb.s:243: Error: Incorrect register `%rdx' used with `l' suffix
>
> As it happens, I'm getting that error building arima/hdama from
> an Opteron (it was suggested as a good starting point for a working
> prom that I could branch off from). It looks like the code in romcc
> has changed enough that the fix doesn't directly apply, and there was
> some doubt as to whether that was the necessary fix. Is there something
> else I should be doing to avoid this error?

The filenames are wrong for this to be something generated with romcc.
romcc is just for the code that runs before we have memory.  Keeping
everything in registers is a pain, but it is very convenient to be
able to do it all in C.

Eric

[Stefan Reinauer]

* Tarl Neustaedter  [040205 01:45]:
> As it happens, I'm getting that error building arima/hdama from
> an Opteron (it was suggested as a good starting point for a working
> prom that I could branch off from). It looks like the code in romcc
> has changed enough that the fix doesn't directly apply, and there was
> some doubt as to whether that was the necessary fix. Is there something
> else I should be doing to avoid this error?

If you add the following two lines to your target Makefile it should
work:
  uses CC
  option CC="gcc -m32"
Building a 64bit image is not (yet) supported, LinuxBIOS/AMD64 is 32bit.

Best regards,
  Stefan Reinauer