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Re: [Qemu-devel] [PATCH 01/22] Add hard build dependency on glib


From: Daniel P. Berrange
Subject: Re: [Qemu-devel] [PATCH 01/22] Add hard build dependency on glib
Date: Mon, 7 Mar 2011 10:59:17 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

On Sun, Mar 06, 2011 at 07:22:43PM -0600, Anthony Liguori wrote:
> GLib is an extremely common library that has a portable thread implementation
> along with tons of other goodies.
> 
> GLib and GObject have a fantastic amount of infrastructure we can leverage in
> QEMU including an object oriented programming infrastructure.
> 
> Short term, it has a very nice thread pool implementation that we could 
> leverage
> in something like virtio-9p.  It also has a test harness implementation that
> this series will use.
> 
> Signed-off-by: Anthony Liguori <address@hidden>
> 
> diff --git a/Makefile b/Makefile
> index eca4c76..6b1d716 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -104,6 +104,8 @@ audio/audio.o audio/fmodaudio.o: QEMU_CFLAGS += 
> $(FMOD_CFLAGS)
>  
>  QEMU_CFLAGS+=$(CURL_CFLAGS)
>  
> +QEMU_CFLAGS+=$(GLIB_CFLAGS)
> +
>  ui/cocoa.o: ui/cocoa.m
>  
>  ui/sdl.o audio/sdlaudio.o ui/sdl_zoom.o baum.o: QEMU_CFLAGS += $(SDL_CFLAGS)
> diff --git a/Makefile.objs b/Makefile.objs
> index 9e98a66..0ba02c7 100644
> --- a/Makefile.objs
> +++ b/Makefile.objs
> @@ -322,3 +322,5 @@ vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
>  
>  vl.o: QEMU_CFLAGS+=$(SDL_CFLAGS)
>  
> +vl.o: QEMU_CFLAGS+=$(GLIB_CFLAGS)
> +
> diff --git a/Makefile.target b/Makefile.target
> index 220589e..0bd42da 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -204,6 +204,7 @@ QEMU_CFLAGS += $(VNC_TLS_CFLAGS)
>  QEMU_CFLAGS += $(VNC_SASL_CFLAGS)
>  QEMU_CFLAGS += $(VNC_JPEG_CFLAGS)
>  QEMU_CFLAGS += $(VNC_PNG_CFLAGS)
> +QEMU_CFLAGS += $(GLIB_CFLAGS)
>  
>  # xen backend driver support
>  obj-$(CONFIG_XEN) += xen_machine_pv.o xen_domainbuild.o
> diff --git a/configure b/configure
> index ef51a58..e1305ae 100755
> --- a/configure
> +++ b/configure
> @@ -1662,6 +1662,18 @@ EOF
>  fi
>  
>  ##########################################
> +# glib support probe
> +if $pkg_config --modversion gthread-2.0 > /dev/null 2>&1 ; then
> +    glib_cflags=`$pkg_config --cflags gthread-2.0 2>/dev/null`
> +    glib_libs=`$pkg_config --libs gthread-2.0 2>/dev/null`
> +    libs_softmmu="$glib_libs $libs_softmmu"
> +    libs_tools="$glib_libs $libs_softmmu"
> +else
> +    echo "glib-2.0 required to compile QEMU"
> +    exit 1
> +fi

It would be preferable to specify an explicit '--atleast-version=2.xxx'
since I doubt QEMU will work with all 2.x versions of glib. Obviously
the min version will limit what platforms QEMU can easily be deployed
on, so we need to be as flexible as possible.

Regards,
Daniel
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