configure, meson: convert libpmem detection to meson

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -427,7 +427,7 @@ qed=${default_feature:-yes}
 parallels=${default_feature:-yes}
 libxml2="$default_feature"
 debug_mutex="no"
-libpmem="$default_feature"
+libpmem="auto"
 default_devices="true"
 plugins="no"
 fuzzing="no"
@@ -1504,9 +1504,9 @@ for opt do
   ;;
   --disable-debug-mutex) debug_mutex=no
   ;;
-  --enable-libpmem) libpmem=yes
+  --enable-libpmem) libpmem=disabled
   ;;
-  --disable-libpmem) libpmem=no
+  --disable-libpmem) libpmem=enabled
   ;;
   --enable-xkbcommon) xkbcommon="enabled"
   ;;
@@ -4933,22 +4933,6 @@ EOF
   fi
 fi
 
-##########################################
-# check for libpmem
-
-if test "$libpmem" != "no"; then
-	if $pkg_config --exists "libpmem"; then
-		libpmem="yes"
-		libpmem_libs=$($pkg_config --libs libpmem)
-		libpmem_cflags=$($pkg_config --cflags libpmem)
-	else
-		if test "$libpmem" = "yes" ; then
-			feature_not_found "libpmem" "Install nvml or pmdk"
-		fi
-		libpmem="no"
-	fi
-fi
-
 ##########################################
 # check for slirp
 
@@ -6087,7 +6071,7 @@ if test "$skip_meson" = no; then
         -Dcurl=$curl -Dglusterfs=$glusterfs -Dbzip2=$bzip2 -Dlibiscsi=$libiscsi \
         -Dlibnfs=$libnfs -Diconv=$iconv -Dcurses=$curses -Dlibudev=$libudev\
         -Drbd=$rbd -Dlzo=$lzo -Dsnappy=$snappy -Dlzfse=$lzfse \
-        -Dlibdaxctl=$libdaxctl \
+        -Dlibdaxctl=$libdaxctl -Dlibpmem=$libpmem \
         -Dgnutls=$gnutls -Dnettle=$nettle -Dgcrypt=$gcrypt -Dauth_pam=$auth_pam \
         -Dzstd=$zstd -Dseccomp=$seccomp -Dvirtfs=$virtfs -Dcap_ng=$cap_ng \
         -Dattr=$attr -Ddefault_devices=$default_devices -Dvirglrenderer=$virglrenderer \

meson.build

@@ -1006,9 +1006,9 @@ if not get_option('libusb').auto() or have_system
 endif
 
 libpmem = not_found
-if 'CONFIG_LIBPMEM' in config_host
-  libpmem = declare_dependency(compile_args: config_host['LIBPMEM_CFLAGS'].split(),
-                               link_args: config_host['LIBPMEM_LIBS'].split())
+if not get_option('libpmem').auto() or have_system
+  libpmem = dependency('libpmem', required: get_option('libpmem'),
+                       method: 'pkg-config', kwargs: static_kwargs)
 endif
 libdaxctl = not_found
 if not get_option('libdaxctl').auto() or have_system
@@ -2822,7 +2822,7 @@ 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 += {'capstone':          capstone_opt == 'disabled' ? false : capstone_opt}
-summary_info += {'libpmem support':   config_host.has_key('CONFIG_LIBPMEM')}
+summary_info += {'libpmem support':   libpmem.found()}
 summary_info += {'libdaxctl support': libdaxctl.found()}
 summary_info += {'libudev':           libudev.found()}
 summary_info += {'FUSE lseek':        fuse_lseek.found()}

meson_options.txt

@@ -86,6 +86,8 @@ option('gcrypt', type : 'feature', value : 'auto',
        description: 'libgcrypt cryptography support')
 option('libdaxctl', type : 'feature', value : 'auto',
        description: 'libdaxctl support')
+option('libpmem', type : 'feature', value : 'auto',
+       description: 'libpmem support')
 option('libudev', type : 'feature', value : 'auto',
        description: 'Use libudev to enumerate host devices')
 option('libusb', type : 'feature', value : 'auto',