This results in failures to create symlinks in a new build directory.  The 
following patch seems to resolve it though.

Regards,

Anthony Liguori

On 06/06/2012 02:36 PM, Paolo Bonzini wrote:
> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
> ---
>   configure |   35 ++---------------------------------
>   rules.mak |    1 +
>   2 files changed, 3 insertions(+), 33 deletions(-)
>
> diff --git a/configure b/configure
> index 301b574..07e3ff1 100755
> --- a/configure
> +++ b/configure
> @@ -3672,26 +3672,6 @@ if [ "$TARGET_BASE_ARCH" = "" ]; then
>     TARGET_BASE_ARCH=$TARGET_ARCH
>   fi
>
> -mkdir -p $target_dir/fpu
> -mkdir -p $target_dir/tcg
> -mkdir -p $target_dir/9pfs
> -mkdir -p $target_dir/hw
> -mkdir -p $target_dir/hw/ide
> -mkdir -p $target_dir/hw/usb
> -mkdir -p $target_dir/hw/9pfs
> -mkdir -p $target_dir/hw/kvm
> -mkdir -p $target_dir/hw/$TARGET_ARCH
> -mkdir -p $target_dir/hw/$TARGET_BASE_ARCH
> -mkdir -p $target_dir/target-$TARGET_BASE_ARCH
> -if test "$target_linux_user" = yes; then
> -  mkdir -p $target_dir/linux-user
> -fi
> -if test "$target_bsd_user" = yes; then
> -  mkdir -p $target_dir/bsd-user
> -fi
> -if test "$target" = "arm-linux-user" -o "$target" = "armeb-linux-user" -o "$target" = "arm-bsd-user" -o "$target" = "armeb-bsd-user" ; then
> -  mkdir -p $target_dir/linux-user/arm/nwfpe
> -fi
>   symlink "$source_path/Makefile.target" "$target_dir/Makefile"
>
>
> @@ -3948,12 +3928,9 @@ done # for target in $targets
>
>   # build tree in object directory in case the source is not in the current directory
>   DIRS="tests tests/tcg tests/tcg/cris tests/tcg/lm32"
> -DIRS="$DIRS slirp audio block net pc-bios/optionrom"
> -DIRS="$DIRS pc-bios/spapr-rtas"
> +DIRS="$DIRS pc-bios/optionrom pc-bios/spapr-rtas"
>   DIRS="$DIRS roms/seabios roms/vgabios"
> -DIRS="$DIRS fsdev ui hw hw/usb"
> -DIRS="$DIRS qapi qapi-generated"
> -DIRS="$DIRS qga trace qom"
> +DIRS="$DIRS qapi-generated"
>   DIRS="$DIRS libcacard libcacard/libcacard libcacard/trace"
>   FILES="Makefile tests/tcg/Makefile qdict-test-data.txt"
>   FILES="$FILES tests/tcg/cris/Makefile tests/tcg/cris/.gdbinit"
> @@ -3992,19 +3969,11 @@ done
>
>   for hwlib in 32 64; do
>     d=libhw$hwlib
> -  mkdir -p $d
> -  mkdir -p $d/hw
> -  mkdir -p $d/hw/ide
> -  mkdir -p $d/hw/usb
>     symlink "$source_path/Makefile.hw" "$d/Makefile"
> -  mkdir -p $d/hw/9pfs
>     echo "QEMU_CFLAGS+=-DTARGET_PHYS_ADDR_BITS=$hwlib">  $d/config.mak
>   done
>
>   d=libuser
> -mkdir -p $d
> -mkdir -p $d/trace
> -mkdir -p $d/qom
>   symlink "$source_path/Makefile.user" "$d/Makefile"
>
>   if test "$docs" = "yes" ; then
> diff --git a/rules.mak b/rules.mak
> index f65283c..4bc5e52 100644
> --- a/rules.mak
> +++ b/rules.mak
> @@ -111,4 +111,5 @@ endef
>   define unnest-vars
>   $(call unnest-vars-1)
>   $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
> +$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
>   endef