--- texinfo-4.8/util/Makefile.in.zlib	2006-01-16 05:53:28.000000000 +0100
+++ texinfo-4.8/util/Makefile.in	2006-01-16 05:53:45.000000000 +0100
@@ -83,7 +83,7 @@
 PROGRAMS = $(bin_PROGRAMS)
 am_ginstall_info_OBJECTS = install-info.$(OBJEXT)
 ginstall_info_OBJECTS = $(am_ginstall_info_OBJECTS)
-ginstall_info_LDADD = $(LDADD)
+ginstall_info_LDADD = $(LDADD) -lz
 am__DEPENDENCIES_1 =
 ginstall_info_DEPENDENCIES = ../lib/libtxi.a $(am__DEPENDENCIES_1)
 texindex_SOURCES = texindex.c
--- texinfo-4.8/util/install-info.c.zlib	2006-01-16 05:55:00.000000000 +0100
+++ texinfo-4.8/util/install-info.c	2006-01-16 06:03:40.000000000 +0100
@@ -20,6 +20,7 @@
 
 #include "system.h"
 #include <getopt.h>
+#include <zlib.h>
 
 static char *progname = "install-info";
 
@@ -529,7 +530,7 @@
    COMPRESSION_PROGRAM.  The compression program is determined by the
    magic number, not the filename.  */
 
-FILE *
+void *
 open_possibly_compressed_file (char *filename,
     void (*create_callback) (char *),
     char **opened_filename, char **compression_program, int *is_pipe) 
@@ -537,7 +538,7 @@
   char *local_opened_filename, *local_compression_program;
   int nread;
   char data[4];
-  FILE *f;
+  gzFile *f;
 
   /* We let them pass NULL if they don't want this info, but it's easier
      to always determine it.  */
@@ -545,16 +546,16 @@
     opened_filename = &local_opened_filename;
 
   *opened_filename = filename;
-  f = fopen (*opened_filename, FOPEN_RBIN);
+  f = gzopen (*opened_filename, FOPEN_RBIN);
   if (!f)
     {
       *opened_filename = concat (filename, ".gz", "");
-      f = fopen (*opened_filename, FOPEN_RBIN);
+      f = gzopen (*opened_filename, FOPEN_RBIN);
   if (!f)
     {
       free (*opened_filename);
       *opened_filename = concat (filename, ".bz2", "");
-      f = fopen (*opened_filename, FOPEN_RBIN);
+      f = gzopen (*opened_filename, FOPEN_RBIN);
     }
 
 #ifdef __MSDOS__
@@ -562,13 +563,13 @@
         {
           free (*opened_filename);
           *opened_filename = concat (filename, ".igz", "");
-          f = fopen (*opened_filename, FOPEN_RBIN);
+          f = gzopen (*opened_filename, FOPEN_RBIN);
         }
       if (!f)
         {
           free (*opened_filename);
           *opened_filename = concat (filename, ".inz", "");
-          f = fopen (*opened_filename, FOPEN_RBIN);
+          f = gzopen (*opened_filename, FOPEN_RBIN);
         }
 #endif
       if (!f)
@@ -580,7 +581,7 @@
               /* And try opening it again.  */
               free (*opened_filename);
               *opened_filename = filename;
-              f = fopen (*opened_filename, FOPEN_RBIN);
+              f = gzopen (*opened_filename, FOPEN_RBIN);
               if (!f)
                 pfatal_with_name (filename);
             }
@@ -591,12 +592,12 @@
 
   /* Read first few bytes of file rather than relying on the filename.
      If the file is shorter than this it can't be usable anyway.  */
-  nread = fread (data, sizeof (data), 1, f);
-  if (nread != 1)
+  nread = gzread (f, data, sizeof (data));
+  if (nread != sizeof (data))
     {
       /* Empty files don't set errno, so we get something like
          "install-info: No error for foo", which is confusing.  */
-      if (nread == 0)
+      if (nread >= 0)
         fatal (_("%s: empty file"), *opened_filename, 0);
       pfatal_with_name (*opened_filename);
     }
@@ -629,20 +630,22 @@
 
   if (*compression_program)
     { /* It's compressed, so fclose the file and then open a pipe.  */
+      FILE *p;
       char *command = concat (*compression_program," -cd <", *opened_filename);
-      if (fclose (f) < 0)
+      if (gzclose (f) < 0)
         pfatal_with_name (*opened_filename);
-      f = popen (command, "r");
-      if (f)
+      p = popen (command, "r");
+      if (p)
         *is_pipe = 1;
       else
         pfatal_with_name (command);
+      return p;
     }
   else
     { /* It's a plain file, seek back over the magic bytes.  */
-      if (fseek (f, 0, 0) < 0)
+      if (gzseek (f, 0, SEEK_SET) < 0)
         pfatal_with_name (*opened_filename);
-#if O_BINARY
+#if 0 && O_BINARY
       /* Since this is a text file, and we opened it in binary mode,
          switch back to text mode.  */
       f = freopen (*opened_filename, "r", f);
@@ -667,7 +670,7 @@
     char **compression_program)
 {
   char *real_name;
-  FILE *f;
+  void *f;
   int pipe_p;
   int filled = 0;
   int data_size = 8192;
@@ -681,7 +684,12 @@
 
   for (;;)
     {
-      int nread = fread (data + filled, 1, data_size - filled, f);
+      int nread;
+
+      if (pipe_p)
+	nread = fread (data + filled, 1, data_size - filled, f);
+      else
+	nread = gzread (f, data + filled, data_size - filled);
       if (nread < 0)
         pfatal_with_name (real_name);
       if (nread == 0)
@@ -703,7 +711,7 @@
   if (pipe_p)
     pclose (f);
   else
-    fclose (f);
+    gzclose (f);
 
   *sizep = filled;
   return data;