virtfs: convert to meson

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -315,7 +315,7 @@ netmap="no"
 sdl="auto"
 sdl_image="auto"
 virtiofsd="auto"
-virtfs="$default_feature"
+virtfs="auto"
 libudev="auto"
 mpath="auto"
 vnc="enabled"
@@ -1004,9 +1004,9 @@ for opt do
   ;;
   --enable-qom-cast-debug) qom_cast_debug="yes"
   ;;
-  --disable-virtfs) virtfs="no"
+  --disable-virtfs) virtfs="disabled"
   ;;
-  --enable-virtfs) virtfs="yes"
+  --enable-virtfs) virtfs="enabled"
   ;;
   --disable-libudev) libudev="disabled"
   ;;
@@ -5476,24 +5476,6 @@ if [ "$eventfd" = "yes" ]; then
   ivshmem=yes
 fi
 
-if test "$softmmu" = yes ; then
-  if test "$linux" = yes; then
-    if test "$virtfs" != no && test "$cap_ng" = yes && test "$attr" = yes ; then
-      virtfs=yes
-    else
-      if test "$virtfs" = yes; then
-        error_exit "VirtFS requires libcap-ng devel and libattr devel"
-      fi
-      virtfs=no
-    fi
-  else
-    if test "$virtfs" = yes; then
-      error_exit "VirtFS is supported only on Linux"
-    fi
-    virtfs=no
-  fi
-fi
-
 # Probe for guest agent support/options
 
 if [ "$guest_agent" != "no" ]; then
@@ -5950,9 +5932,6 @@ fi
 if test "$libattr" = "yes" ; then
   echo "CONFIG_LIBATTR=y" >> $config_host_mak
 fi
-if test "$virtfs" = "yes" ; then
-  echo "CONFIG_VIRTFS=y" >> $config_host_mak
-fi
 if test "$vhost_scsi" = "yes" ; then
   echo "CONFIG_VHOST_SCSI=y" >> $config_host_mak
 fi
@@ -6624,7 +6603,7 @@ NINJA=$ninja $meson setup \
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
         -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse \
-        -Dzstd=$zstd -Dseccomp=$seccomp \
+        -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs \
         -Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
         -Dvhost_user_blk_server=$vhost_user_blk_server \
         -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek \

meson.build

@@ -964,6 +964,25 @@ endif
 # config-host.h #
 #################
 
+have_virtfs = (targetos == 'linux' and
+    have_system and
+    libattr.found() and
+    libcap_ng.found())
+
+if get_option('virtfs').enabled()
+  if not have_virtfs
+    if targetos != 'linux'
+      error('virtio-9p (virtfs) requires Linux')
+    elif not libcap_ng.found() or not libattr.found()
+      error('virtio-9p (virtfs) requires libcap-ng-devel and libattr-devel')
+    elif not have_system
+      error('virtio-9p (virtfs) needs system emulation support')
+    endif
+  endif
+elif get_option('virtfs').disabled()
+  have_virtfs = false
+endif
+
 config_host_data.set_quoted('CONFIG_BINDIR', get_option('prefix') / get_option('bindir'))
 config_host_data.set_quoted('CONFIG_PREFIX', get_option('prefix'))
 config_host_data.set_quoted('CONFIG_QEMU_CONFDIR', get_option('prefix') / qemu_confdir)
@@ -1006,6 +1025,7 @@ config_host_data.set('CONFIG_VNC', vnc.found())
 config_host_data.set('CONFIG_VNC_JPEG', jpeg.found())
 config_host_data.set('CONFIG_VNC_PNG', png.found())
 config_host_data.set('CONFIG_VNC_SASL', sasl.found())
+config_host_data.set('CONFIG_VIRTFS', have_virtfs)
 config_host_data.set('CONFIG_XKBCOMMON', xkbcommon.found())
 config_host_data.set('CONFIG_KEYUTILS', keyutils.found())
 config_host_data.set('CONFIG_GETTID', has_gettid)
@@ -1104,7 +1124,7 @@ host_kconfig = \
   ('CONFIG_VHOST_USER' in config_host ? ['CONFIG_VHOST_USER=y'] : []) + \
   ('CONFIG_VHOST_VDPA' in config_host ? ['CONFIG_VHOST_VDPA=y'] : []) + \
   ('CONFIG_VHOST_KERNEL' in config_host ? ['CONFIG_VHOST_KERNEL=y'] : []) + \
-  ('CONFIG_VIRTFS' in config_host ? ['CONFIG_VIRTFS=y'] : []) + \
+  (have_virtfs ? ['CONFIG_VIRTFS=y'] : []) + \
   ('CONFIG_LINUX' in config_host ? ['CONFIG_LINUX=y'] : []) + \
   ('CONFIG_PVRDMA' in config_host ? ['CONFIG_PVRDMA=y'] : [])
 
@@ -2293,7 +2313,7 @@ summary_info += {'mingw32 support':   targetos == 'windows'}
 summary_info += {'Audio drivers':     config_host['CONFIG_AUDIO_DRIVERS']}
 summary_info += {'Block whitelist (rw)': config_host['CONFIG_BDRV_RW_WHITELIST']}
 summary_info += {'Block whitelist (ro)': config_host['CONFIG_BDRV_RO_WHITELIST']}
-summary_info += {'VirtFS support':    config_host.has_key('CONFIG_VIRTFS')}
+summary_info += {'VirtFS support':    have_virtfs}
 summary_info += {'build virtiofs daemon': have_virtiofsd}
 summary_info += {'Multipath support': mpathpersist.found()}
 summary_info += {'VNC support':       vnc.found()}

meson_options.txt

@@ -88,17 +88,20 @@ option('vnc_sasl', type : 'feature', value : 'auto',
        description: 'SASL authentication for VNC server')
 option('xkbcommon', type : 'feature', value : 'auto',
        description: 'xkbcommon support')
-option('virtiofsd', type: 'feature', value: 'auto',
-       description: 'build virtiofs daemon (virtiofsd)')
-option('vhost_user_blk_server', type: 'feature', value: 'auto',
-       description: 'build vhost-user-blk server')
 option('zstd', type : 'feature', value : 'auto',
        description: 'zstd compression support')
 option('fuse', type: 'feature', value: 'auto',
        description: 'FUSE block device export')
 option('fuse_lseek', type : 'feature', value : 'auto',
        description: 'SEEK_HOLE/SEEK_DATA support for FUSE exports')
 
+option('vhost_user_blk_server', type: 'feature', value: 'auto',
+       description: 'build vhost-user-blk server')
+option('virtfs', type: 'feature', value: 'auto',
+       description: 'virtio-9p support')
+option('virtiofsd', type: 'feature', value: 'auto',
+       description: 'build virtiofs daemon (virtiofsd)')
+
 option('capstone', type: 'combo', value: 'auto',
        choices: ['disabled', 'enabled', 'auto', 'system', 'internal'],
        description: 'Whether and how to find the capstone library')