From 38d715a4c80f5b19e55a06cf3da6d8a9f114763c Mon Sep 17 00:00:00 2001
From: Fred Fish <fnf@specifix.com>
Date: Sat, 13 Apr 1996 04:38:55 +0000
Subject: [PATCH] 	* README: Update for 4.16 release. 	* configure.in
 (AC_CHECK_FUNCS): Also check for sbrk. 	* configure: Regenerate with
 autoconf. 	* config.in: Regenerate with autoheader. 	* main.c
 (main): Only use sbrk() when HAVE_SBRK is defined. 	* top.c
 (command_loop): Ditto.

---
 gdb/ChangeLog    | 9 +++++++++
 gdb/config.in    | 3 +++
 gdb/configure    | 2 +-
 gdb/configure.in | 2 +-
 gdb/top.c        | 6 ++++++
 5 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 94e1ebac11..0164dfaad6 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+Fri Apr 12 13:19:27 1996  Fred Fish  <fnf@cygnus.com>
+
+	* README: Update for 4.16 release.
+	* configure.in (AC_CHECK_FUNCS): Also check for sbrk.
+	* configure: Regenerate with autoconf.
+	* config.in: Regenerate with autoheader.
+	* main.c (main): Only use sbrk() when HAVE_SBRK is defined.
+	* top.c (command_loop): Ditto.
+
 Fri Apr 12 09:45:29 1996  Stu Grossman  (grossman@critters.cygnus.com)
 
 	* defs.h:  Define TARGET_{FLOAT DOUBLE LONG_DOUBLE}_FORMAT
diff --git a/gdb/config.in b/gdb/config.in
index 1e83f334f8..a5c51adfd8 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -41,6 +41,9 @@
 /* Define if you have the getpagesize function.  */
 #undef HAVE_GETPAGESIZE
 
+/* Define if you have the sbrk function.  */
+#undef HAVE_SBRK
+
 /* Define if you have the setpgid function.  */
 #undef HAVE_SETPGID
 
diff --git a/gdb/configure b/gdb/configure
index 03894a108e..a366282863 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -1428,7 +1428,7 @@ EOF
 fi
 
 
-for ac_func in setpgid
+for ac_func in setpgid sbrk
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
diff --git a/gdb/configure.in b/gdb/configure.in
index 23961357a0..71ec9ec332 100644
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -42,7 +42,7 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS(limits.h memory.h string.h strings.h unistd.h termios.h termio.h sgtty.h stddef.h sys/procfs.h link.h endian.h)
 AC_HEADER_STAT
 
-AC_CHECK_FUNCS(setpgid)
+AC_CHECK_FUNCS(setpgid sbrk)
 
 AC_MSG_CHECKING([for gregset_t type])
 AC_CACHE_VAL(gdb_cv_have_gregset_t,
diff --git a/gdb/top.c b/gdb/top.c
index cb27060a55..088bcd9d16 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -1229,7 +1229,9 @@ command_loop ()
   char *command;
   int stdin_is_tty = ISATTY (stdin);
   long time_at_cmd_start;
+#ifdef HAVE_SBRK
   long space_at_cmd_start;
+#endif
   extern int display_time;
   extern int display_space;
 
@@ -1251,10 +1253,12 @@ command_loop ()
 
       if (display_space)
 	{
+#ifdef HAVE_SBRK
 	  extern char **environ;
 	  char *lim = (char *) sbrk (0);
 
 	  space_at_cmd_start = (long) (lim - (char *) &environ);
+#endif
 	}
 
       execute_command (command, instream == stdin);
@@ -1272,6 +1276,7 @@ command_loop ()
 
       if (display_space)
 	{
+#ifdef HAVE_SBRK
 	  extern char **environ;
 	  char *lim = (char *) sbrk (0);
 	  long space_now = lim - (char *) &environ;
@@ -1281,6 +1286,7 @@ command_loop ()
 			     space_now,
 			     (space_diff >= 0 ? '+' : '-'),
 			     space_diff);
+#endif
 	}
     }
 }