BUILD: Improve extractor handling. Removed platform.h from include

Extractor is not properly detected and GNUNET_FS_EXTRACTOR_ENABLED
added to gnunet_config.h.
platform.h is removed from $PREFIX/include as it must not be included
by third parties anyway.

33 files changed, 137 insertions, 179 deletions

diff --git a/src/fs/fs.h b/src/fs/fs.h
index 920cf27b2..c3bae65d2 100644
--- a/src/fs/fs.h
+++ b/src/fs/fs.h
@@ -29,7 +29,7 @@
 #include "gnunet_constants.h"
 #include "gnunet_datastore_service.h"
 #include "gnunet_dht_service.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_block_lib.h"
 #include "block_fs.h"
diff --git a/src/fs/fs_api.c b/src/fs/fs_api.c
index c786d660c..627c58004 100644
--- a/src/fs/fs_api.c
+++ b/src/fs/fs_api.c
@@ -26,7 +26,7 @@
 
 #include "platform.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 #include "fs_tree.h"
diff --git a/src/fs/fs_api.h b/src/fs/fs_api.h
index 9c9ce0f24..fdda91928 100644
--- a/src/fs/fs_api.h
+++ b/src/fs/fs_api.h
@@ -29,7 +29,7 @@
 #include "gnunet_constants.h"
 #include "gnunet_datastore_service.h"
 #include "gnunet_dht_service.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_block_lib.h"
 #include "block_fs.h"
diff --git a/src/fs/fs_directory.c b/src/fs/fs_directory.c
index e53b2dc11..c693f9216 100644
--- a/src/fs/fs_directory.c
+++ b/src/fs/fs_directory.c
@@ -33,7 +33,7 @@
  *   into memory
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 
diff --git a/src/fs/fs_dirmetascan.c b/src/fs/fs_dirmetascan.c
index 3990a2521..2379e29ce 100644
--- a/src/fs/fs_dirmetascan.c
+++ b/src/fs/fs_dirmetascan.c
@@ -26,7 +26,7 @@
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_scheduler_lib.h"
 #include <pthread.h>
diff --git a/src/fs/fs_download.c b/src/fs/fs_download.c
index 73e12acb1..2a21e4810 100644
--- a/src/fs/fs_download.c
+++ b/src/fs/fs_download.c
@@ -24,7 +24,7 @@
  */
 #include "platform.h"
 #include "gnunet_constants.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 #include "fs_tree.h"
diff --git a/src/fs/fs_getopt.c b/src/fs/fs_getopt.c
index 186963bba..0135e2e05 100644
--- a/src/fs/fs_getopt.c
+++ b/src/fs/fs_getopt.c
@@ -24,7 +24,7 @@
  * @author Igor Wronsky, Christian Grothoff
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 
diff --git a/src/fs/fs_list_indexed.c b/src/fs/fs_list_indexed.c
index 7d30933dd..78816cad1 100644
--- a/src/fs/fs_list_indexed.c
+++ b/src/fs/fs_list_indexed.c
@@ -26,7 +26,7 @@
 
 #include "platform.h"
 #include "gnunet_constants.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_protocols.h"
 #include "fs_api.h"
diff --git a/src/fs/fs_misc.c b/src/fs/fs_misc.c
index 3ae82a82e..a8e23f042 100644
--- a/src/fs/fs_misc.c
+++ b/src/fs/fs_misc.c
@@ -24,7 +24,7 @@
  */
 #include "platform.h"
 #include "gnunet_constants.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 
diff --git a/src/fs/fs_namespace.c b/src/fs/fs_namespace.c
index b3eeeb23c..f8b7b91c0 100644
--- a/src/fs/fs_namespace.c
+++ b/src/fs/fs_namespace.c
@@ -28,7 +28,7 @@
 #include "gnunet_constants.h"
 #include "gnunet_signatures.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 #include "fs_publish_ublock.h"
diff --git a/src/fs/fs_publish.c b/src/fs/fs_publish.c
index bd533fcfb..d1662c78b 100644
--- a/src/fs/fs_publish.c
+++ b/src/fs/fs_publish.c
@@ -28,7 +28,7 @@
 #include "gnunet_constants.h"
 #include "gnunet_signatures.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 #include "fs_tree.h"
diff --git a/src/fs/fs_publish_ksk.c b/src/fs/fs_publish_ksk.c
index d8ea22da2..3981ad335 100644
--- a/src/fs/fs_publish_ksk.c
+++ b/src/fs/fs_publish_ksk.c
@@ -30,7 +30,7 @@
 #include "gnunet_constants.h"
 #include "gnunet_signatures.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "fs_api.h"
 #include "fs_tree.h"
diff --git a/src/fs/fs_publish_ublock.h b/src/fs/fs_publish_ublock.h
index 991926444..4adffc6c1 100644
--- a/src/fs/fs_publish_ublock.h
+++ b/src/fs/fs_publish_ublock.h
@@ -30,7 +30,7 @@
 
 #include "gnunet_util_lib.h"
 #include "gnunet_datastore_service.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_identity_service.h"
 
diff --git a/src/fs/fs_search.c b/src/fs/fs_search.c
index 975dcfb14..823f046ed 100644
--- a/src/fs/fs_search.c
+++ b/src/fs/fs_search.c
@@ -24,7 +24,7 @@
  */
 #include "platform.h"
 #include "gnunet_constants.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_protocols.h"
 #include "fs_api.h"
diff --git a/src/fs/fs_sharetree.c b/src/fs/fs_sharetree.c
index a09b3589d..6c246a3ad 100644
--- a/src/fs/fs_sharetree.c
+++ b/src/fs/fs_sharetree.c
@@ -25,7 +25,7 @@
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_scheduler_lib.h"
 #include <pthread.h>
diff --git a/src/fs/fs_unindex.c b/src/fs/fs_unindex.c
index 6031d7bc3..68ba667c4 100644
--- a/src/fs/fs_unindex.c
+++ b/src/fs/fs_unindex.c
@@ -26,7 +26,7 @@
  */
 #include "platform.h"
 #include "gnunet_constants.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_protocols.h"
 #include "fs_api.h"
diff --git a/src/fs/fs_uri.c b/src/fs/fs_uri.c
index 0810f77ca..b0be0db4f 100644
--- a/src/fs/fs_uri.c
+++ b/src/fs/fs_uri.c
@@ -81,7 +81,7 @@
  *
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_signatures.h"
 #include "fs_api.h"
diff --git a/src/fs/gnunet-daemon-fsprofiler.c b/src/fs/gnunet-daemon-fsprofiler.c
index bc7ca9521..b99933cfa 100644
--- a/src/fs/gnunet-daemon-fsprofiler.c
+++ b/src/fs/gnunet-daemon-fsprofiler.c
@@ -27,7 +27,7 @@
  * - how to signal driver that we're done?
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_statistics_service.h"
 
diff --git a/src/fs/gnunet-directory.c b/src/fs/gnunet-directory.c
index e720628b3..ab9f2905a 100644
--- a/src/fs/gnunet-directory.c
+++ b/src/fs/gnunet-directory.c
@@ -23,7 +23,7 @@
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 static int ret;
diff --git a/src/fs/gnunet-download.c b/src/fs/gnunet-download.c
index f463f901e..4694077e9 100644
--- a/src/fs/gnunet-download.c
+++ b/src/fs/gnunet-download.c
@@ -26,7 +26,7 @@
  * @author Igor Wronsky
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 static int ret;
diff --git a/src/fs/gnunet-fs.c b/src/fs/gnunet-fs.c
index 3dd00c7dc..21e3c4a40 100644
--- a/src/fs/gnunet-fs.c
+++ b/src/fs/gnunet-fs.c
@@ -23,7 +23,7 @@
  * @author Christian Grothoff
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 /**
diff --git a/src/fs/gnunet-helper-fs-publish.c b/src/fs/gnunet-helper-fs-publish.c
index b886280c9..0e07b79dc 100644
--- a/src/fs/gnunet-helper-fs-publish.c
+++ b/src/fs/gnunet-helper-fs-publish.c
@@ -27,7 +27,7 @@
  * and report the results to stdout.
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 
diff --git a/src/fs/gnunet-publish.c b/src/fs/gnunet-publish.c
index 094cbc9b9..59f16210a 100644
--- a/src/fs/gnunet-publish.c
+++ b/src/fs/gnunet-publish.c
@@ -26,7 +26,7 @@
  * @author Igor Wronsky
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "gnunet_identity_service.h"
 
diff --git a/src/fs/gnunet-search.c b/src/fs/gnunet-search.c
index b55602523..a72cf97cc 100644
--- a/src/fs/gnunet-search.c
+++ b/src/fs/gnunet-search.c
@@ -30,7 +30,7 @@
 #include <ctype.h>
 #include <inttypes.h>
 #include <limits.h>
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 
diff --git a/src/fs/gnunet-unindex.c b/src/fs/gnunet-unindex.c
index 80cd95c19..326f75a63 100644
--- a/src/fs/gnunet-unindex.c
+++ b/src/fs/gnunet-unindex.c
@@ -26,7 +26,7 @@
  * @author Igor Wronsky
  */
 #include "platform.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 static int ret;
diff --git a/src/fs/meta_data.c b/src/fs/meta_data.c
index f676ce57c..3e2857101 100644
--- a/src/fs/meta_data.c
+++ b/src/fs/meta_data.c
@@ -28,7 +28,7 @@
 
 #include "platform.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 /**
diff --git a/src/fs/plugin_block_fs.c b/src/fs/plugin_block_fs.c
index a6cfb2e64..bbd0ff57b 100644
--- a/src/fs/plugin_block_fs.c
+++ b/src/fs/plugin_block_fs.c
@@ -25,7 +25,7 @@
  */
 #include "platform.h"
 #include "gnunet_block_plugin.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 #include "block_fs.h"
 #include "gnunet_signatures.h"
diff --git a/src/fs/test_fs_meta_data.c b/src/fs/test_fs_meta_data.c
index 50f902cb5..bee7844ea 100644
--- a/src/fs/test_fs_meta_data.c
+++ b/src/fs/test_fs_meta_data.c
@@ -28,7 +28,7 @@
 
 #include "platform.h"
 #include "gnunet_util_lib.h"
-#include "gnunet_extractor_compat.h"
+
 #include "gnunet_fs_service.h"
 
 #define ABORT(m) { fprintf (stderr, "Error at %s:%d\n", __FILE__, __LINE__); \
diff --git a/src/include/Makefile.am b/src/include/Makefile.am
index 6ece35851..4a0429900 100644
--- a/src/include/Makefile.am
+++ b/src/include/Makefile.am
@@ -4,13 +4,13 @@ SUBDIRS = .
 gnunetincludedir = $(includedir)/gnunet
 
 EXTRA_DIST = \
+  platform.h \
   gauger.h \
   block_fs.h \
   block_dns.h \
   block_regex.h
 
 gnunetinclude_HEADERS = \
-  platform.h \
   gnunet_config.h \
   gettext.h \
   compat.h \
@@ -51,7 +51,6 @@ gnunetinclude_HEADERS = \
   gnunet_dnsstub_lib.h \
   gnunet_dns_service.h \
   gnunet_error_codes.h \
-  gnunet_extractor_compat.h \
   gnunet_fragmentation_lib.h \
   gnunet_friends_lib.h \
   gnunet_fs_service.h \
diff --git a/src/include/gnunet_config.h.in b/src/include/gnunet_config.h.in
index ce7c5a894..63ffd84bd 100644
--- a/src/include/gnunet_config.h.in
+++ b/src/include/gnunet_config.h.in
@@ -48,4 +48,11 @@
 /* Set to 1 if GnuTLS has DANE support */
 #define GNUNET_CURL_GNUTLS @curl_gnutls@
 
+/**
+ * Set to 1 if file-sharing meta data parsing is built with
+ * libextractor, which means that callers to the API must use also use
+ * libextractor.
+ */
+#define GNUNET_FS_EXTRACTOR_ENABLED @extractor@
+
 #endif
diff --git a/src/include/gnunet_extractor_compat.h b/src/include/gnunet_extractor_compat.h
deleted file mode 100644
index d69525c9d..000000000
--- a/src/include/gnunet_extractor_compat.h
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
-     This file is part of GNUnet
-     Copyright (C) 2022 GNUnet e.V.
-
-     GNUnet is free software: you can redistribute it and/or modify it
-     under the terms of the GNU Affero General Public License as published
-     by the Free Software Foundation, either version 3 of the License,
-     or (at your option) any later version.
-
-     GNUnet is distributed in the hope that it will be useful, but
-     WITHOUT ANY WARRANTY; without even the implied warranty of
-     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-     Affero General Public License for more details.
-
-     You should have received a copy of the GNU Affero General Public License
-     along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-     SPDX-License-Identifier: AGPL3.0-or-later
- */
-/**
- * @author Martin Schanzenbach
- *
- * @file
- * libextractor compatibility insanity helper header
- *
- * @{
- */
-#ifndef GNUNET_EXTRACTOR_COMPAT_H
-#define GNUNET_EXTRACTOR_COMPAT_H
-
-
-#ifdef __cplusplus
-extern "C"
-{
-#if 0                           /* keep Emacsens' auto-indent happy */
-}
-#endif
-#endif
-
-#if HAVE_EXTRACTOR_H
-
-#include <extractor.h>
-
-#else
-
-/* definitions from extractor.h we need for the build */
-
-/**
- * Enumeration defining various sources of keywords.  See also
- * http://dublincore.org/documents/1998/09/dces/
- */
-enum EXTRACTOR_MetaType
-{
-  EXTRACTOR_METATYPE_RESERVED = 0,
-  EXTRACTOR_METATYPE_MIMETYPE = 1,
-  EXTRACTOR_METATYPE_FILENAME = 2,
-  EXTRACTOR_METATYPE_COMMENT = 3,
-  EXTRACTOR_METATYPE_TITLE = 4,
-  EXTRACTOR_METATYPE_BOOK_TITLE = 5,
-  EXTRACTOR_METATYPE_JOURNAL_NAME = 8,
-  EXTRACTOR_METATYPE_AUTHOR_NAME = 13,
-  EXTRACTOR_METATYPE_PUBLICATION_DATE = 24,
-  EXTRACTOR_METATYPE_URL = 29,
-  EXTRACTOR_METATYPE_URI = 30,
-  EXTRACTOR_METATYPE_ISRC = 31,
-  EXTRACTOR_METATYPE_UNKNOWN = 45,
-  EXTRACTOR_METATYPE_DESCRIPTION = 46,
-  EXTRACTOR_METATYPE_KEYWORDS = 49,
-  EXTRACTOR_METATYPE_SUBJECT = 52,
-  EXTRACTOR_METATYPE_PACKAGE_NAME = 69,
-  EXTRACTOR_METATYPE_THUMBNAIL = 114,
-  EXTRACTOR_METATYPE_ALBUM = 129,
-  EXTRACTOR_METATYPE_ARTIST = 130,
-  EXTRACTOR_METATYPE_ORIGINAL_TITLE = 162,
-  EXTRACTOR_METATYPE_GNUNET_FULL_DATA = 174,
-  EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME = 180,
-};
-
-/**
- * Format in which the extracted meta data is presented.
- */
-enum EXTRACTOR_MetaFormat
-{
-  /**
-   * Format is unknown.
-   */
-  EXTRACTOR_METAFORMAT_UNKNOWN = 0,
-
-  /**
-   * 0-terminated, UTF-8 encoded string.  "data_len"
-   * is strlen(data)+1.
-   */
-  EXTRACTOR_METAFORMAT_UTF8 = 1,
-
-  /**
-   * Some kind of binary format, see given Mime type.
-   */
-  EXTRACTOR_METAFORMAT_BINARY = 2,
-
-  /**
-   * 0-terminated string.  The specific encoding is unknown.
-   * "data_len" is strlen (data)+1.
-   */
-  EXTRACTOR_METAFORMAT_C_STRING = 3
-};
-
-
-/**
- * Type of a function that libextractor calls for each
- * meta data item found.
- *
- * @param cls closure (user-defined)
- * @param plugin_name name of the plugin that produced this value;
- *        special values can be used (e.g. '&lt;zlib&gt;' for zlib being
- *        used in the main libextractor library and yielding
- *        meta data).
- * @param type libextractor-type describing the meta data
- * @param format basic format information about @a data
- * @param data_mime_type mime-type of @a data (not of the original file);
- *        can be NULL (if mime-type is not known)
- * @param data actual meta-data found
- * @param data_len number of bytes in @a data
- * @return 0 to continue extracting, 1 to abort
- */
-typedef int (*EXTRACTOR_MetaDataProcessor) (void *cls,
-                                            const char *plugin_name,
-                                            enum EXTRACTOR_MetaType type,
-                                            enum EXTRACTOR_MetaFormat format,
-                                            const char *data_mime_type,
-                                            const char *data,
-                                            size_t data_len);
-
-#endif
-
-#ifndef EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME
-/* hack for LE < 0.6.3 */
-#define EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME 180
-#endif
-
-#if 0                           /* keep Emacsens' auto-indent happy */
-{
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-#endif
-
-/** @} */  /* end of group */
diff --git a/src/include/gnunet_fs_service.h b/src/include/gnunet_fs_service.h
index 53ca6a9ec..5c271c71f 100644
--- a/src/include/gnunet_fs_service.h
+++ b/src/include/gnunet_fs_service.h
@@ -71,6 +71,106 @@ extern "C"
  */
 #define GNUNET_FS_VERSION 0x00090300
 
+#if GNUNET_FS_EXTRACTOR_ENABLED
+
+#include <extractor.h>
+
+#else
+
+/* definitions from extractor.h we need for the build */
+
+/**
+ * Enumeration defining various sources of keywords.  See also
+ * http://dublincore.org/documents/1998/09/dces/
+ */
+enum EXTRACTOR_MetaType
+{
+  EXTRACTOR_METATYPE_RESERVED = 0,
+  EXTRACTOR_METATYPE_MIMETYPE = 1,
+  EXTRACTOR_METATYPE_FILENAME = 2,
+  EXTRACTOR_METATYPE_COMMENT = 3,
+  EXTRACTOR_METATYPE_TITLE = 4,
+  EXTRACTOR_METATYPE_BOOK_TITLE = 5,
+  EXTRACTOR_METATYPE_JOURNAL_NAME = 8,
+  EXTRACTOR_METATYPE_AUTHOR_NAME = 13,
+  EXTRACTOR_METATYPE_PUBLICATION_DATE = 24,
+  EXTRACTOR_METATYPE_URL = 29,
+  EXTRACTOR_METATYPE_URI = 30,
+  EXTRACTOR_METATYPE_ISRC = 31,
+  EXTRACTOR_METATYPE_UNKNOWN = 45,
+  EXTRACTOR_METATYPE_DESCRIPTION = 46,
+  EXTRACTOR_METATYPE_KEYWORDS = 49,
+  EXTRACTOR_METATYPE_SUBJECT = 52,
+  EXTRACTOR_METATYPE_PACKAGE_NAME = 69,
+  EXTRACTOR_METATYPE_THUMBNAIL = 114,
+  EXTRACTOR_METATYPE_ALBUM = 129,
+  EXTRACTOR_METATYPE_ARTIST = 130,
+  EXTRACTOR_METATYPE_ORIGINAL_TITLE = 162,
+  EXTRACTOR_METATYPE_GNUNET_FULL_DATA = 174,
+  EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME = 180,
+};
+
+/**
+ * Format in which the extracted meta data is presented.
+ */
+enum EXTRACTOR_MetaFormat
+{
+  /**
+   * Format is unknown.
+   */
+  EXTRACTOR_METAFORMAT_UNKNOWN = 0,
+
+  /**
+   * 0-terminated, UTF-8 encoded string.  "data_len"
+   * is strlen(data)+1.
+   */
+  EXTRACTOR_METAFORMAT_UTF8 = 1,
+
+  /**
+   * Some kind of binary format, see given Mime type.
+   */
+  EXTRACTOR_METAFORMAT_BINARY = 2,
+
+  /**
+   * 0-terminated string.  The specific encoding is unknown.
+   * "data_len" is strlen (data)+1.
+   */
+  EXTRACTOR_METAFORMAT_C_STRING = 3
+};
+
+
+/**
+ * Type of a function that libextractor calls for each
+ * meta data item found.
+ *
+ * @param cls closure (user-defined)
+ * @param plugin_name name of the plugin that produced this value;
+ *        special values can be used (e.g. '&lt;zlib&gt;' for zlib being
+ *        used in the main libextractor library and yielding
+ *        meta data).
+ * @param type libextractor-type describing the meta data
+ * @param format basic format information about @a data
+ * @param data_mime_type mime-type of @a data (not of the original file);
+ *        can be NULL (if mime-type is not known)
+ * @param data actual meta-data found
+ * @param data_len number of bytes in @a data
+ * @return 0 to continue extracting, 1 to abort
+ */
+typedef int (*EXTRACTOR_MetaDataProcessor) (void *cls,
+                                            const char *plugin_name,
+                                            enum EXTRACTOR_MetaType type,
+                                            enum EXTRACTOR_MetaFormat format,
+                                            const char *data_mime_type,
+                                            const char *data,
+                                            size_t data_len);
+
+#endif
+
+#ifndef EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME
+/* hack for LE < 0.6.3 */
+#define EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME 180
+#endif
+
 
 /* ******************** URI API *********************** */
 
diff --git a/src/include/gnunet_util_lib.h b/src/include/gnunet_util_lib.h
index 280304825..ada40a4ca 100644
--- a/src/include/gnunet_util_lib.h
+++ b/src/include/gnunet_util_lib.h
@@ -65,6 +65,7 @@ extern "C"
 #define GNUNET_AGPL_URL "https://git.gnunet.org/gnunet.git/tag/?h=v" \
   GNUNET_VERSION
 
+#include "gnunet_config.h"
 #include "gnunet_common.h"
 #include "gnunet_crypto_lib.h"
 #include "gnunet_bandwidth_lib.h"