zstd: convert to meson

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

configure

@@ -397,7 +397,7 @@ lzo="auto"
 snappy="auto"
 bzip2="auto"
 lzfse="auto"
-zstd="$default_feature"
+zstd="auto"
 guest_agent="$default_feature"
 guest_agent_with_vss="no"
 guest_agent_ntddscsi="no"
@@ -1327,9 +1327,9 @@ for opt do
   ;;
   --disable-lzfse) lzfse="disabled"
   ;;
-  --disable-zstd) zstd="no"
+  --disable-zstd) zstd="disabled"
   ;;
-  --enable-zstd) zstd="yes"
+  --enable-zstd) zstd="enabled"
   ;;
   --enable-guest-agent) guest_agent="yes"
   ;;
@@ -2457,23 +2457,6 @@ EOF
   fi
 fi
 
-##########################################
-# zstd check
-
-if test "$zstd" != "no" ; then
-    libzstd_minver="1.4.0"
-    if $pkg_config --atleast-version=$libzstd_minver libzstd ; then
-        zstd_cflags="$($pkg_config --cflags libzstd)"
-        zstd_libs="$($pkg_config --libs libzstd)"
-        zstd="yes"
-    else
-        if test "$zstd" = "yes" ; then
-            feature_not_found "libzstd" "Install libzstd devel"
-        fi
-        zstd="no"
-    fi
-fi
-
 ##########################################
 # libseccomp check
 
@@ -6101,12 +6084,6 @@ if test "$avx512f_opt" = "yes" ; then
   echo "CONFIG_AVX512F_OPT=y" >> $config_host_mak
 fi
 
-if test "$zstd" = "yes" ; then
-  echo "CONFIG_ZSTD=y" >> $config_host_mak
-  echo "ZSTD_CFLAGS=$zstd_cflags" >> $config_host_mak
-  echo "ZSTD_LIBS=$zstd_libs" >> $config_host_mak
-fi
-
 if test "$seccomp" = "yes"; then
   echo "CONFIG_SECCOMP=y" >> $config_host_mak
   echo "SECCOMP_CFLAGS=$seccomp_cflags" >> $config_host_mak
@@ -6671,6 +6648,7 @@ NINJA=$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 \
         -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

@@ -384,9 +384,10 @@ if not get_option('libiscsi').auto() or have_block
                          method: 'pkg-config', static: enable_static)
 endif
 zstd = not_found
-if 'CONFIG_ZSTD' in config_host
-  zstd = declare_dependency(compile_args: config_host['ZSTD_CFLAGS'].split(),
-                            link_args: config_host['ZSTD_LIBS'].split())
+if not get_option('zstd').auto() or have_block
+  zstd = dependency('libzstd', version: '>=1.4.0',
+                    required: get_option('zstd'),
+                    method: 'pkg-config', static: enable_static)
 endif
 gbm = not_found
 if 'CONFIG_GBM' in config_host
@@ -1008,6 +1009,7 @@ config_host_data.set('CONFIG_KEYUTILS', keyutils.found())
 config_host_data.set('CONFIG_GETTID', has_gettid)
 config_host_data.set('CONFIG_MALLOC_TRIM', has_malloc_trim)
 config_host_data.set('CONFIG_STATX', has_statx)
+config_host_data.set('CONFIG_ZSTD', zstd.found())
 config_host_data.set('CONFIG_FUSE', fuse.found())
 config_host_data.set('CONFIG_FUSE_LSEEK', fuse_lseek.found())
 config_host_data.set('CONFIG_CFI', get_option('cfi'))
@@ -2383,7 +2385,7 @@ summary_info += {'lzo support':       lzo.found()}
 summary_info += {'snappy support':    snappy.found()}
 summary_info += {'bzip2 support':     libbzip2.found()}
 summary_info += {'lzfse support':     liblzfse.found()}
-summary_info += {'zstd support':      config_host.has_key('CONFIG_ZSTD')}
+summary_info += {'zstd support':      zstd.found()}
 summary_info += {'NUMA host support': config_host.has_key('CONFIG_NUMA')}
 summary_info += {'libxml2':           config_host.has_key('CONFIG_LIBXML2')}
 summary_info += {'memory allocator':  get_option('malloc')}

meson_options.txt

@@ -90,6 +90,8 @@ 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',

migration/meson.build

@@ -28,6 +28,6 @@ softmmu_ss.add(files(
 
 softmmu_ss.add(when: ['CONFIG_RDMA', rdma], if_true: files('rdma.c'))
 softmmu_ss.add(when: 'CONFIG_LIVE_BLOCK_MIGRATION', if_true: files('block.c'))
-softmmu_ss.add(when: 'CONFIG_ZSTD', if_true: [files('multifd-zstd.c'), zstd])
+softmmu_ss.add(when: zstd, if_true: files('multifd-zstd.c'))
 
 specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: files('dirtyrate.c', 'ram.c'))