Re: [PATCH 4/6] configure, pc-bios/vof: pass cross CFLAGS correctly

[Richard Henderson]

On 6/21/22 00:51, Paolo Bonzini wrote:
> Use the flags passed to the configure script for the ppc cross compiler,
> which in fact default to those that are needed to get the 32-bit ISA.
> Add the endianness flag so that it remains possible to use a ppc64le
> compiler to compile VOF.
>
> This also fixes compilation of TCG tests using a biarch compiler,
> for example ppc64 tests on ppc64le.
>
> Reported-by: Matheus Ferst <matheus.ferst@eldorado.org.br
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Probably you missed this, but last night (gmt-7) I sent:

make[1]: Entering directory `/home/rth/qemu/bld/pc-bios/vof'

cc -m32 -mbig-endian -mcpu=power4 -c -o entry.o 
/home/rth/qemu/src/pc-bios/vof/entry.S

cc1: error: ‘-m32’ not supported in this configuration

make[1]: *** [entry.o] Error 1


This with a compiler I built myself,

$ cc -v

Using built-in specs.

COLLECT_GCC=gcc

COLLECT_LTO_WRAPPER=/home/rth/gcc/run/libexec/gcc/powerpc64le-unknown-linux-gnu/11.0.1/lto-wrapper

Target: powerpc64le-unknown-linux-gnu

Configured with: ../git-gcc/configure --prefix=/home/rth/gcc/run

Thread model: posix

Supported LTO compression algorithms: zlib

gcc version 11.0.1 20210321 (experimental) [master revision 
19ff0b0:fca73fc:6af7b307f659a4f1845a9efd36ca37899515e234] (GCC)


With default configure options, gcc is not biarch.
It would be good to probe whether EXTRA_CFLAGS is actually usable.


r~