libnfs: convert to meson

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

configure

@@ -406,7 +406,7 @@ vss_win32_sdk="$default_feature"
 win_sdk="no"
 want_tools="$default_feature"
 libiscsi="auto"
-libnfs="$default_feature"
+libnfs="auto"
 coroutine=""
 coroutine_pool="$default_feature"
 debug_stack_usage="no"
@@ -1142,9 +1142,9 @@ for opt do
   ;;
   --enable-libiscsi) libiscsi="enabled"
   ;;
-  --disable-libnfs) libnfs="no"
+  --disable-libnfs) libnfs="disabled"
   ;;
-  --enable-libnfs) libnfs="yes"
+  --enable-libnfs) libnfs="enabled"
   ;;
   --enable-profiler) profiler="yes"
   ;;
@@ -5560,20 +5560,6 @@ if test "$have_ubsan" = "yes"; then
   QEMU_LDFLAGS="-fsanitize=undefined $QEMU_LDFLAGS"
 fi
 
-##########################################
-# Do we have libnfs
-if test "$libnfs" != "no" ; then
-  if $pkg_config --atleast-version=1.9.3 libnfs; then
-    libnfs="yes"
-    libnfs_libs=$($pkg_config --libs libnfs)
-  else
-    if test "$libnfs" = "yes" ; then
-      feature_not_found "libnfs" "Install libnfs devel >= 1.9.3"
-    fi
-    libnfs="no"
-  fi
-fi
-
 ##########################################
 
 # Exclude --warn-common with TSan to suppress warnings from the TSan libraries.
@@ -6215,11 +6201,6 @@ if test "$zstd" = "yes" ; then
   echo "ZSTD_LIBS=$zstd_libs" >> $config_host_mak
 fi
 
-if test "$libnfs" = "yes" ; then
-  echo "CONFIG_LIBNFS=y" >> $config_host_mak
-  echo "LIBNFS_LIBS=$libnfs_libs" >> $config_host_mak
-fi
-
 if test "$seccomp" = "yes"; then
   echo "CONFIG_SECCOMP=y" >> $config_host_mak
   echo "SECCOMP_CFLAGS=$seccomp_cflags" >> $config_host_mak
@@ -6786,7 +6767,7 @@ NINJA=$ninja $meson setup \
         -Dgettext=$gettext -Dxkbcommon=$xkbcommon -Du2f=$u2f -Dvirtiofsd=$virtiofsd \
         -Dcapstone=$capstone -Dslirp=$slirp -Dfdt=$fdt -Dbrlapi=$brlapi \
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
-        -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
+        -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
         -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

@@ -323,8 +323,10 @@ if 'CONFIG_LIBXML2' in config_host
                                link_args: config_host['LIBXML2_LIBS'].split())
 endif
 libnfs = not_found
-if 'CONFIG_LIBNFS' in config_host
-  libnfs = declare_dependency(link_args: config_host['LIBNFS_LIBS'].split())
+if not get_option('libnfs').auto() or have_block
+  libnfs = dependency('libnfs', version: '>=1.9.3',
+                      required: get_option('libnfs'),
+                      method: 'pkg-config', static: enable_static)
 endif
 libattr = not_found
 if 'CONFIG_ATTR' in config_host
@@ -934,6 +936,7 @@ if glusterfs.found()
   config_host_data.set('CONFIG_GLUSTERFS_IOCB_HAS_STAT', glusterfs_iocb_has_stat)
 endif
 config_host_data.set('CONFIG_LIBISCSI', libiscsi.found())
+config_host_data.set('CONFIG_LIBNFS', libnfs.found())
 config_host_data.set('CONFIG_SDL', sdl.found())
 config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
 config_host_data.set('CONFIG_VHOST_USER_BLK_SERVER', have_vhost_user_blk_server)
@@ -2293,7 +2296,7 @@ summary_info += {'usb net redir':     config_host.has_key('CONFIG_USB_REDIR')}
 summary_info += {'OpenGL support':    config_host.has_key('CONFIG_OPENGL')}
 summary_info += {'OpenGL dmabufs':    config_host.has_key('CONFIG_OPENGL_DMABUF')}
 summary_info += {'libiscsi support':  libiscsi.found()}
-summary_info += {'libnfs support':    config_host.has_key('CONFIG_LIBNFS')}
+summary_info += {'libnfs support':    libnfs.found()}
 summary_info += {'build guest agent': config_host.has_key('CONFIG_GUEST_AGENT')}
 if targetos == 'windows'
   if 'WIN_SDK' in config_host

meson_options.txt

@@ -52,6 +52,8 @@ option('glusterfs', type : 'feature', value : 'auto',
        description: 'Glusterfs block device driver')
 option('libiscsi', type : 'feature', value : 'auto',
        description: 'libiscsi userspace initiator')
+option('libnfs', type : 'feature', value : 'auto',
+       description: 'libnfs block device driver')
 option('mpath', type : 'feature', value : 'auto',
        description: 'Multipath persistent reservation passthrough')
 option('iconv', type : 'feature', value : 'auto',