diff -uwr glimpse-4.15.orig/agrep/agrep.c glimpse-4.15/agrep/agrep.c
--- glimpse-4.15.orig/agrep/agrep.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/agrep/agrep.c	2003-02-25 22:27:54.000000000 +0200
@@ -11,7 +11,6 @@
 #define PRINT(s)
 
 extern char **environ;
-extern int errno;
 int pattern_index;	/* index in argv where the pattern is */
 
 int glimpse_isserver=0;	/* so that there is no user interaction */
diff -uwr glimpse-4.15.orig/agrep/checksg.c glimpse-4.15/agrep/checksg.c
--- glimpse-4.15.orig/agrep/checksg.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/agrep/checksg.c	2003-02-25 22:27:54.000000000 +0200
@@ -1,8 +1,8 @@
 /* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal.  All Rights Reserved. */
+#include <errno.h>
 #include "agrep.h"
 #include "checkfile.h"
 
-extern int errno;
 extern CHAR Progname[MAXNAME]; 
 extern int SGREP, PAT_FILE, PAT_BUFFER, EXITONERROR, SIMPLEPATTERN,
 	CONSTANT, D, NOUPPER, JUMP, I, LINENUM, INVERSE, WORDBOUND, WHOLELINE,
diff -uwr glimpse-4.15.orig/agrep/compat.c glimpse-4.15/agrep/compat.c
--- glimpse-4.15.orig/agrep/compat.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/agrep/compat.c	2003-02-25 22:27:54.000000000 +0200
@@ -1,5 +1,6 @@
 /* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal.  All Rights Reserved. */
 /* test the conflicts between options */
+#include <errno.h>
 #include <stdio.h>
 #include "agrep.h"
 
@@ -15,7 +16,6 @@
 extern char Progname[MAXNAME];
 extern int agrep_initialfd;
 extern int EXITONERROR;
-extern int errno;
 
 int
 compat()
diff -uwr glimpse-4.15.orig/agrep/maskgen.c glimpse-4.15/agrep/maskgen.c
--- glimpse-4.15.orig/agrep/maskgen.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/agrep/maskgen.c	2003-02-25 22:27:54.000000000 +0200
@@ -1,4 +1,5 @@
 /* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal.  All Rights Reserved. */
+#include <errno.h>
 #include "agrep.h"
 
 extern unsigned D_endpos, endposition, Init1, wildmask;
@@ -7,7 +8,6 @@
 extern unsigned char Progname[];
 extern int agrep_initialfd;
 extern int EXITONERROR;
-extern int errno;
 
 int
 maskgen(Pattern, D)
diff -uwr glimpse-4.15.orig/agrep/preprocess.c glimpse-4.15/agrep/preprocess.c
--- glimpse-4.15.orig/agrep/preprocess.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/agrep/preprocess.c	2003-02-25 22:27:54.000000000 +0200
@@ -13,6 +13,7 @@
 /* upon return, Pattern contains the pattern to be processed by maskgen  */
 /* D_pattern contains transformed D_pattern                              */
 
+#include <errno.h>
 #include "agrep.h"
 
 extern int PAT_FILE, PAT_BUFFER;
@@ -25,7 +26,6 @@
 extern int table[WORD][WORD];
 extern int agrep_initialfd;
 extern int EXITONERROR;
-extern int errno;
 
 extern int  multifd;
 extern char *multibuf;
diff -uwr glimpse-4.15.orig/get_index.c glimpse-4.15/get_index.c
--- glimpse-4.15.orig/get_index.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/get_index.c	2003-02-25 22:27:54.000000000 +0200
@@ -1,4 +1,5 @@
 /* Copyright (c) 1994 Burra Gopal, Udi Manber.  All Rights Reserved. */
+#include <errno.h>
 #include "glimpse.h"
 #include "defs.h"
 
@@ -14,7 +15,6 @@
 extern	unsigned int *dest_index_set;
 extern	unsigned char *dest_index_buf;
 extern	int	mask_int[32];
-extern	int	errno;
 extern	int	ByteLevelIndex;
 extern  int	RecordLevelIndex;
 extern  int	rdelim_len;
diff -uwr glimpse-4.15.orig/index/build_in.c glimpse-4.15/index/build_in.c
--- glimpse-4.15.orig/index/build_in.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/index/build_in.c	2003-02-25 22:27:54.000000000 +0200
@@ -23,6 +23,7 @@
            this 12 19 \n is 9 17 12 18 19 \n an 7 12 \n example 16 \n
 -----------------------------------------------------------------------*/
 
+#include <errno.h>
 #include "glimpse.h"
 
 #define debugt
@@ -604,7 +605,6 @@
     int ret;
     char s[MAX_LINE_LEN], es1[MAX_LINE_LEN], es2[MAX_LINE_LEN], es3[MAX_LINE_LEN];
     char s1[MAX_LINE_LEN];
-    extern int errno;
     static int maxsortlinelen = 0;
     int	i;
 
diff -uwr glimpse-4.15.orig/index/partition.c glimpse-4.15/index/partition.c
--- glimpse-4.15.orig/index/partition.c	2003-02-25 22:29:06.000000000 +0200
+++ glimpse-4.15/index/partition.c	2003-02-25 22:27:54.000000000 +0200
@@ -1,6 +1,7 @@
 /* Copyright (c) 1994 Sun Wu, Udi Manber, Burra Gopal.  All Rights Reserved. */
 /* ./glimpse/index/partition.c */
 #include "glimpse.h"
+#include <errno.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 
@@ -27,7 +28,6 @@
 int  files_per_partition;
 int  files_in_partition;
 int  ATLEASTONEFILE = 0;
-extern int errno;
 
 char patbuf[MAX_PAT];
 extern unsigned char *src_index_buf;