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diff --git a/include/comp_src.h.in b/include/comp_src.h.in
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+++ b/include/comp_src.h.in
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+/* @configure_input@ 
+ *
+ * comp_src.h: structure used by decompress.c 
+ *  
+ * Copyright (C) 1994 Graeme W. Wilford. (Wilf.)
+ *
+ * This file is part of man-db.
+ *
+ * man-db is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Sat Oct 29 13:09:31 GMT 1994  Wilf. (G.Wilford@ee.surrey.ac.uk) 
+ */
+
+/*--------------------------------------------------------------------------*/
+/* This is where we define the decompressors used to decompress any nroff   */
+/* source that we find. All cat pages are compressed with either gzip (if   */
+/* available) or compress. This is not the place to define _the_ cat page   */
+/* decompressor - see ./manconfig.h for that.                               */
+/*                                                                          */
+/* To add a decompressor all you need to know is its name (preferrably its  */
+/* location), and the unique extension that it gives to files compressed    */
+/* with it. Here is an example. You have a compressor named foobar and      */
+/* compressed files have an extension of .fb . It is located in /usr/bin    */
+/* and requires a -d option to be used as a decompressor. Add the following */
+/* line to the structure below.                                             */
+/*                                                                          */
+/* {"/usr/bin/foobar -d", "fb", NULL},                                      */
+/*--------------------------------------------------------------------------*/
+
+#ifndef MAN_COMP_SRC_H
+#define MAN_COMP_SRC_H
+
+struct compression comp_list[] = {
+
+/* If we have gzip, incorporate the following */
+#ifdef HAVE_GZIP
+	{GUNZIP, "gz", NULL},
+	{GUNZIP, "z", NULL},
+#endif /* HAVE_GZIP */
+
+/* If we have compress, incorporate the following */
+#ifdef HAVE_COMPRESS
+	{UNCOMPRESS, "Z", NULL},
+/* Else if we have gzip, incorporate the following */
+#elif defined (HAVE_GZIP)
+	{GUNZIP, "Z", NULL},
+#endif /* HAVE_COMPRESS || HAVE_GZIP */
+
+/* If we have bzip2, incorporate the following */
+#ifdef HAVE_BZIP2
+	{BUNZIP2, "bz2", NULL},
+#endif /* HAVE_BZIP2 */
+
+/* If we have xz, incorporate the following */
+#ifdef HAVE_XZ
+	{UNXZ, "xz", NULL},
+	{UNXZ, "lzma", NULL},
+/* Else if we have lzma, incorporate the following */
+#elif defined (HAVE_LZMA)
+	{UNLZMA, "lzma", NULL},
+#endif /* HAVE_XZ || HAVE_LZMA */
+
+/* If we have lzip, incorporate the following */
+#ifdef HAVE_LZIP
+	{UNLZIP, "lz", NULL},
+#endif /* HAVE_LZIP */
+
+/* If we have zstd, incorporate the following */
+#ifdef HAVE_ZSTD
+	{UNZSTD, "zst", NULL},
+	{UNZSTD, "zstd", NULL},
+#endif /* HAVE_ZSTD */
+
+/*------------------------------------------------------*/
+/* Add your decompressor(s) and extension(s) below here */
+/*------------------------------------------------------*/
+
+
+
+/*----------------*/
+/* and above here */
+/*----------------*/
+
+/* ... and the last structure is */
+	{NULL, NULL, NULL}
+};
+
+#endif /* MAN_COMP_SRC_H */