--- texinfo-4.11/util/Makefile.in_old	2007-09-10 02:37:45.000000000 +0200
+++ texinfo-4.11/util/Makefile.in	2007-09-19 10:29:06.000000000 +0200
@@ -110,7 +110,7 @@
 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 \
 	$(top_builddir)/gnulib/lib/libgnu.a $(am__DEPENDENCIES_1)
--- texinfo-4.11/util/install-info.c_old	2007-07-01 23:20:33.000000000 +0200
+++ texinfo-4.11/util/install-info.c	2007-09-19 10:40:02.000000000 +0200
@@ -20,6 +20,7 @@
 #include "system.h"
 #include <getopt.h>
 #include <regex.h>
+#include <zlib.h>
 
 static char *progname = "install-info";
 
@@ -559,7 +560,7 @@
    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) 
@@ -567,7 +568,7 @@
   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.  */
@@ -575,16 +576,16 @@
     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__
@@ -592,13 +593,13 @@
         {
           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)
@@ -610,7 +611,7 @@
               /* 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);
             }
@@ -621,12 +622,12 @@
 
   /* 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);
     }
@@ -659,20 +660,22 @@
 
   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);
@@ -697,7 +700,7 @@
     char **compression_program)
 {
   char *real_name;
-  FILE *f;
+  void *f;
   int pipe_p;
   int filled = 0;
   int data_size = 8192;
@@ -711,7 +714,12 @@
 
   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)
@@ -733,7 +741,7 @@
   if (pipe_p)
     pclose (f);
   else
-    fclose (f);
+    gzclose (f);
 
   *sizep = filled;
   return data;