Re: [Qemu-devel] [PATCH Risu v2 2/3] configure: Add initial support to PPC64 (big endian)

[Peter Maydell <peter.maydell@linaro.org>]

On 9 March 2017 at 19:38, Jose Ricardo Ziviani
<joserz@linux.vnet.ibm.com> wrote:
> This commit set Makefile to point to ppc64le source for both archs
> (ppc64 and ppc64le) because they do the exact same thing. The
> difference is in risugen and how the binary is build.

If we're going to share a single set of source files for ppc64le
and ppc64 (which makes sense) then I think we should use ARCH=ppc64
for that, and rename the 'ppc64le' source files to 'ppc64'.

The rest of these patches look OK.

> Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
> ---
>  configure | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/configure b/configure
> index 055e6d6..dd64d8b 100755
> --- a/configure
> +++ b/configure
> @@ -51,11 +51,7 @@ guess_arch() {
>      elif check_define __aarch64__ ; then
>          ARCH="aarch64"
>      elif check_define __powerpc64__ ; then
> -        if check_define __BIG_ENDIAN__; then
> -            ARCH="ppc64"
> -        else
> -            ARCH="ppc64le"
> -        fi
> +        ARCH="ppc64le"
>      else
>          echo "This cpu is not supported by risu. Try -h. " >&2
>          exit 1
> @@ -127,6 +123,9 @@ OBJDUMP="${OBJDUMP-${CROSS_PREFIX}objdump}"
>
>  if test "x${ARCH}" = "x"; then
>      guess_arch
> +elif test "x${ARCH}" = "xppc64"; then
> +    # ppc64 and ppc64le uses the same C source code
> +    ARCH="ppc64le"
>  fi
>
>  generate_makefilein
> --
> 2.7.4
>

Incidentally, maybe we should just drop support for
specifying ARCH= manually to configure. I can't really
see a use case where the auto-detection won't do the
right thing.

thanks
-- PMM