Delete Tru64 support

This commit does most of the mechanical removal.  IOW, the easy part.

procfs.c isn't touched beyond removing a couple obvious bits that are
guarded by a couple macros defined in config/alpha/nm-osf3.h.  Going
beyond that for procfs.c & co would be a harder excision that
potentially affects Solaris.

Some comments in the generic alpha code ABIs that may still be
relevant and I wouldn't know what to do with them.  That can always be
done on a separate pass, preferably by someone who can test on alpha.

A couple other spots have references to OSF/Tru64 and related files
being removed, but it felt like removing them would make things worse,
not better.  We can revisit those when we next need to touch that
code.

I didn't remove a reference to osf in testsuite/lib/future.exp, as I
believe that code is imported from DejaGNU.

Built and tested on x86_64 Fedora 20, with --enable-targets=all.

Tested that building for --target=alpha-osf3 on x86_64 Fedora 20
fails with:

 checking for default auto-load directory... $debugdir:$datadir/auto-load
 checking for default auto-load safe-path... $debugdir:$datadir/auto-load
 *** Configuration alpha-unknown-osf3 is obsolete.
 *** Support has been REMOVED.
 make[1]: *** [configure-gdb] Error 1
 make[1]: Leaving directory `build-osf'
 make: *** [all] Error 2

gdb/
2014-10-17  Pedro Alves  <palves@redhat.com>

	* Makefile.in (ALL_64_TARGET_OBS): Remove alpha-osf1-tdep.o.
	(HFILES_NO_SRCDIR): Remove config/alpha/nm-osf3.h.
	(ALLDEPFILES): Remove alpha-nat.c, alpha-osf1-tdep.c and
	solib-osf.c.
	* NEWS: Mention that support for alpha*-*-osf* has been removed.
	* ada-lang.h [__alpha__ && __osf__]
	(ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS): Delete.
	* alpha-nat.c, alpha-osf1-tdep.c: Delete files.
	* alpha-tdep.c (alpha_gdbarch_init): Remove reference to
	GDB_OSABI_OSF1.
	* config/alpha/alpha-osf3.mh, config/alpha/nm-osf3.h: Delete
	files.
	* config/djgpp/fnchange.lst (config/alpha/alpha-osf1.mh)
	(config/alpha/alpha-osf2.mh, config/alpha/alpha-osf3.mh): Delete.
	* configure: Regenerate.
	* configure.ac: Remove references to osf.
	* configure.host: Handle alpha*-*-osf* in the obsolete hosts
	section.  Remove all other references to osf.
	* configure.tgt: Add alpha*-*-osf* to the obsolete targets section.
	Remove all other references to osf.
	* dec-thread.c: Delete file.
	* defs.h (GDB_OSABI_OSF1): Delete.
	* inferior.h (START_INFERIOR_TRAPS_EXPECTED): New unconditionally
	defined.
	* osabi.c (gdb_osabi_names): Delete "OSF/1".
	* procfs.c (procfs_debug_inferior) [PROCFS_DONT_TRACE_FAULTS]:
	Delete code.
	(unconditionally_kill_inferior)
	[PROCFS_NEED_CLEAR_CURSIG_FOR_KILL]: Delete code.
	* solib-osf.c: Delete file.

gdb/testsuite/
2014-10-17  Pedro Alves  <palves@redhat.com>

	* gdb.base/callfuncs.exp: emove references to osf.
	* gdb.base/sigall.exp: Likewise.
	* gdb.gdb/selftest.exp: Likewise.
	* gdb.hp/gdb.base-hp/callfwmall.exp: Likewise.
	* gdb.mi/non-stop.c: Likewise.
	* gdb.mi/pthreads.c: Likewise.
	* gdb.reverse/sigall-precsave.exp: Likewise.
	* gdb.reverse/sigall-reverse.exp: Likewise.
	* gdb.threads/pthreads.c: Likewise.
	* gdb.threads/pthreads.exp: Likewise.

gdb/doc/
2014-10-17  Pedro Alves  <palves@redhat.com>

	* gdb.texinfo (Ada Tasks and Core Files): Delete mention of Tru64.
	(SVR4 Process Information): Delete mention of OSF/1.

1 files changed, 0 insertions, 8 deletions

diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c
index 9e4a8d89f1..27fc59213a 100644
--- a/gdb/alpha-tdep.c
+++ b/gdb/alpha-tdep.c
@@ -1749,14 +1749,6 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   struct gdbarch_tdep *tdep;
   struct gdbarch *gdbarch;
 
-  /* Try to determine the ABI of the object we are loading.  */
-  if (info.abfd != NULL && info.osabi == GDB_OSABI_UNKNOWN)
-    {
-      /* If it's an ECOFF file, assume it's OSF/1.  */
-      if (bfd_get_flavour (info.abfd) == bfd_target_ecoff_flavour)
-	info.osabi = GDB_OSABI_OSF1;
-    }
-
   /* Find a candidate among extant architectures.  */
   arches = gdbarch_list_lookup_by_info (arches, &info);
   if (arches != NULL)