Reimplement DJGPP's .gdbinit -> gdb.ini renaming.

This simplifies the .gdbinit filename selection logic.

We have a GDBINIT_FILENAME define that supposedly configurations would
override, but none do so.  Instead, the only configuration that wants
a different file name instead of ".gdbinit", djgpp, does a strcpy over
the gdbinit global array.  This means the array needs to be sized, and
the code that does that is doing the usual
'PATH_MAX/FILENAME_MAX/fallback constant/etc.' mess.

Instead of all that, it's much simpler to have configure specificy the
.gdbinit filename.  As bonus, we can then make the "gdbinit" global
array const.

gdb/
2013-07-01  Pedro Alves  <palves@redhat.com>

	* configure.ac (GDBINIT): Define, depending on host.
	* go32-nat.c (init_go32_ops): Don't override gdbinit here.
	* top.c (PATH_MAX): Delete fallback definition.
	(GDBINIT_FILENAME): Delete.
	(gdbinit): Reimplement as const char array set to the GDBINIT
	string constant.
	* top.h (gdbinit): Make const.

1 files changed, 2 insertions, 13 deletions

diff --git a/gdb/top.c b/gdb/top.c
index 8ac756f..e78897f 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -78,20 +78,9 @@ extern void initialize_all_files (void);
 #define DEFAULT_PROMPT	"(gdb) "
 #endif
 
-/* Initialization file name for gdb.  This is overridden in some configs.  */
-
-#ifndef PATH_MAX
-# ifdef FILENAME_MAX
-#  define PATH_MAX FILENAME_MAX
-# else
-#  define PATH_MAX 512
-# endif
-#endif
+/* Initialization file name for gdb.  This is host-dependent.  */
 
-#ifndef	GDBINIT_FILENAME
-#define	GDBINIT_FILENAME	".gdbinit"
-#endif
-char gdbinit[PATH_MAX + 1] = GDBINIT_FILENAME;
+const char gdbinit[] = GDBINIT;
 
 int inhibit_gdbinit = 0;