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Re: [Qemu-devel] [PATCH v1 1/1] ./configure: add option for disabling Vi


From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v1 1/1] ./configure: add option for disabling VirtFS
Date: Thu, 9 Feb 2012 22:39:33 +0000

On 7 February 2012 20:44, Meador Inge <address@hidden> wrote:
> Signed-off-by: Meador Inge <address@hidden>
> ---
>  Makefile  |    4 ++++
>  configure |   16 +++++++++++++---
>  2 files changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 47acf3d..030619c 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -40,7 +40,9 @@ HELPERS-$(CONFIG_LINUX) = qemu-bridge-helper$(EXESUF)
>
>  ifdef BUILD_DOCS
>  DOCS=qemu-doc.html qemu-tech.html qemu.1 qemu-img.1 qemu-nbd.8 
> QMP/qmp-commands.txt
> +ifdef CONFIG_VIRTFS
>  DOCS+=fsdev/virtfs-proxy-helper.1
> +endif
>  else
>  DOCS=
>  endif
> @@ -162,8 +164,10 @@ qemu-io$(EXESUF): qemu-io.o cmd.o $(tools-obj-y) 
> $(block-obj-y)
>
>  qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o
>
> +ifdef CONFIG_VIRTFS
>  fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o 
> fsdev/virtio-9p-marshal.o oslib-posix.o $(trace-obj-y)
>  fsdev/virtfs-proxy-helper$(EXESUF): LIBS += -lcap
> +endif

We don't need to make this conditional, we will just not put
the proxy-helper into TOOLS if we don't want to build it and
this dependency will be ignored.

>  qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx
>        $(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN 
>   $@")
> diff --git a/configure b/configure
> index 763db24..081d720 100755
> --- a/configure
> +++ b/configure
> @@ -121,6 +121,7 @@ docs=""
>  fdt=""
>  nptl=""
>  sdl=""
> +virtfs="yes"
>  vnc="yes"
>  sparse="no"
>  uuid=""
> @@ -586,6 +587,10 @@ for opt do
>   ;;
>   --enable-sdl) sdl="yes"
>   ;;
> +  --disable-virtfs) virtfs="no"
> +  ;;
> +  --enable-virtfs) virtfs="yes"
> +  ;;
>   --disable-vnc) vnc="no"
>   ;;
>   --enable-vnc) vnc="yes"

This should be handled the same way as a number of other optional
components : default is "" meaning 'probe and use if possible'.
So you end up with a test like:

if test "$virtfs" != no; then
   if test "$cap" = yes && test "$linux" = yes && test "$attr" = yes; then
       virtfs=yes
       tools="$tools fsdev/virtfs-proxy-helper\$(EXESUF)"
   else
       if test "$virtfs" = yes; then
           feature_not_found "virtfs"
       fi
   fi
fi

and then later just
if test "$virtfs" = "yes" ; then
   echo "CONFIG_VIRTFS=y" >> $config_host_mak
fi

-- PMM



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