[PATCH] Make cygwin use .gdbinit

[Christopher Faylor <cgf@redhat.com>]

I've changed the default initialization file for cygwin to '.gdbinit',
issuing a warning if the old style initialization filename was found.

Since this changes documented behavior, I also modified the documentation
as an obvious fix.

FYI,
cgf

ChangeLog:
2001-11-24  Christopher Faylor  <cgf@redhat.com>

	* win32-nat.c (_initialize_check_for_gdb_ini): New function.

doc/ChangeLog:
2001-11-24  Christopher Faylor  <cgf@redhat.com>

	* gdb.texinfo (File Options): Change description of -nx and gdb.ini to
	specifically refer to MS-DOS.
	(command files): Mention gdb.ini is only used on MS-DOS.

Index: win32-nat.c
===================================================================
RCS file: /cvs/uberbaum/gdb/win32-nat.c,v
retrieving revision 1.36
diff -u -p -r1.36 win32-nat.c
--- win32-nat.c	2001/11/01 16:17:08	1.36
+++ win32-nat.c	2001/11/24 18:17:38
@@ -32,6 +32,7 @@
 #include "command.h"
 #include "completer.h"
 #include "regcache.h"
+#include "top.h"
 #include <signal.h>
 #include <sys/types.h>
 #include <fcntl.h>
@@ -1752,4 +1753,32 @@ void
 _initialize_core_win32 (void)
 {
   add_core_fns (&win32_elf_core_fns);
+}
+
+void
+_initialize_check_for_gdb_ini (void)
+{
+  char *homedir;
+  if (inhibit_gdbinit)
+    return;
+
+  homedir = getenv ("HOME");
+  if (homedir)
+    {
+      char *p;
+      char *oldini = (char *) alloca (strlen (homedir) +
+				      sizeof ("/gdb.ini"));
+      strcpy (oldini, homedir);
+      p = strchr (oldini, '\0');
+      if (p > oldini && p[-1] != '/')
+	*p++ = '/';
+      strcpy (p, "gdb.ini");
+      if (access (oldini, 0) == 0)
+	{
+	  int len = strlen (oldini);
+	  char *newini = alloca (len + 1);
+	  sprintf (newini, "%.*s.gdbinit", len - (sizeof ("gdb.ini") - 1), oldini);
+	  warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini);
+	}
+    }
 }
Index: config/i386/xm-cygwin.h
===================================================================
RCS file: /cvs/uberbaum/gdb/config/i386/xm-cygwin.h,v
retrieving revision 1.4
diff -u -p -r1.4 xm-cygwin.h
--- xm-cygwin.h	2001/08/27 22:39:56	1.4
+++ xm-cygwin.h	2001/11/24 18:17:38
@@ -22,15 +22,5 @@
 
 #include "fopen-bin.h"
 
-#define GDBINIT_FILENAME "gdb.ini"
-
 /* Define this if source files use \r\n rather than just \n.  */
 #define CRLF_SOURCE_FILES
-
-/* If under Cygwin, provide backwards compatibility with older
-   Cygwin compilers that don't define the current cpp define. */
-#ifdef __CYGWIN32__
-#ifndef __CYGWIN__
-#define __CYGWIN__
-#endif
-#endif 
Index: doc/gdb.texinfo
===================================================================
RCS file: /cvs/uberbaum/gdb/doc/gdb.texinfo,v
retrieving revision 1.55
diff -u -p -r1.55 gdb.texinfo
--- gdb.texinfo	2001/11/22 00:21:45	1.55
+++ gdb.texinfo	2001/11/24 18:17:49
@@ -913,7 +913,7 @@ batch mode or quiet mode.
 @cindex @code{--nx}
 @cindex @code{-n}
 Do not execute commands found in any initialization files (normally
-called @file{.gdbinit}, or @file{gdb.ini} on PCs).  Normally,
+called @file{.gdbinit} or @file{gdb.ini} under MS-DOS).  Normally,
 @value{GDBN} executes the commands in these files after all the command
 options and arguments have been processed.  @xref{Command Files,,Command
 files}.
@@ -13067,8 +13067,9 @@ the last command, as it would from the t
 @cindex @file{.gdbinit}
 @cindex @file{gdb.ini}
 When you start @value{GDBN}, it automatically executes commands from its
-@dfn{init files}.  These are files named @file{.gdbinit} on Unix and
-@file{gdb.ini} on DOS/Windows.  During startup, @value{GDBN} does the
+@dfn{init files}.  These files are normally named @file{.gdbinit} although
+filename limitations require that they be named @file{gdb.ini} on MS-DOS.
+During startup, @value{GDBN} does the
 following:
 
 @enumerate