Re: [PATCH] Simplify target and platform checks

[Javier Martín]

El jue, 17-07-2008 a las 12:50 -0400, Pavel Roskin escribió:
> ChangeLog:
> 
>       * configure.ac: Default to efi platform for x86_64-apple.  Allow
>       powerpc64 CPU, default to ieee1275 platform for it.  Split CPU
>       adjustments from the rest, only do them if target is not
>       explicitly given.  Merge other adjustments with the final sanity
>       check.  Remove an extraneous check for supported CPU.  Be
>       specific which CPU and which platform is not supported.
> 
> Index: configure.ac
> ===================================================================
> --- configure.ac      (revision 1716)
> +++ configure.ac      (working copy)
> @@ -61,46 +61,37 @@
>    case "$target_cpu"-"$target_vendor" in
>      i386-apple) platform=efi ;;
>      i386-*) platform=pc ;;
> +    x86_64-apple) platform=efi ;;
>      x86_64-*) platform=pc ;;
>      powerpc-*) platform=ieee1275 ;;
> +    powerpc64-*) platform=ieee1275 ;;
>      sparc64-*) platform=ieee1275 ;;
> -    *) AC_MSG_ERROR([unsupported machine type]) ;;
> +    *) AC_MSG_ERROR([unsupported CPU: "$target_cpu"]) ;;
>    esac
>  else
>    platform="$with_platform"
>  fi
>  
> -case "$platform" in
> -  linuxbios) platform=coreboot ;;
> -esac
> -
> -if test "x$platform" = "xefi" ; then
> -  case "$target_cpu" in
> -    i386) ;;
> -    x86_64) target_m64=1 ;;
> -    *) AC_MSG_ERROR([unsupported CPU type for EFI]) ;;
> +# Adjust CPU unless target was explicitly specified.
> +if test -z "$target_alias"; then
> +  case "$target_cpu"-"$platform" in
> +    x86_64-efi) ;;
> +    x86_64-*) target_cpu=i386 target_m32=1 ;;
> +    powerpc64-ieee1275) target_cpu=powerpc target_m32=1 ;;
>    esac
> -else
> -  case "$target_cpu" in
> -    i386) ;;
> -    x86_64) target_cpu=i386 target_m32=1 ;;
> -    powerpc) ;;
> -    powerpc64) target_cpu=powerpc target_m32=1;;
> -    sparc64) ;;
> -    *) AC_MSG_ERROR([unsupported CPU type]) ;;
> -  esac
>  fi
>  
> -# Sanity check.
> +# Check if the platform is supported, make final adjustments.
>  case "$target_cpu"-"$platform" in
>    i386-efi) ;;
> -  x86_64-efi) ;;
> +  x86_64-efi) target_m64=1 ;;
>    i386-pc) ;;
>    i386-coreboot) ;;
> +  i386-linuxbios) platform=coreboot ;;
>    i386-ieee1275) ;;
>    powerpc-ieee1275) ;;
>    sparc64-ieee1275) ;;
> -  *) AC_MSG_ERROR([unsupported machine type]) ;;
> +  *) AC_MSG_ERROR([platform "$platform" is not supported for target CPU 
> "$target_cpu"]) ;;
>  esac
>  
>  AC_SUBST(target_cpu)
> 

Confirmed to work on amd64 PC with Ubuntu Hardy (default system type
from config.guess is x86_64-unknown-linux-gnu)

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