Integrate changes #8608,8609,8610,8611,8612,8613 from maintperl.

perl's internal variables are not for public consumption,
move their docs from perlapi.pod to perlintern.pod

support for -Dusethreads build under HP-UX 10.20 and DCE threads
library (11.0 and later have pthreads but 10.x don't)

avoid uninitialized value warnings

canonicalize paths when doing chdir() on windows (or Cwd::getcwd()
gets weird results)

perldoc nit on windows

make it possible to run the tests outside the source tree
(there's still a dependency on ../lib being the library
location)

p4raw-link: @8612 on //depot/maint-5.6/perl: 21b80573951053245624647c6ea0077acae22b99
p4raw-link: @8611 on //depot/maint-5.6/perl: 706e8e4d2d0a6985197cb1cb76dc3d2575cd159e
p4raw-link: @8610 on //depot/maint-5.6/perl: fc1aae957f18d75529c72450055ab0d424b7d318
p4raw-link: @8609 on //depot/maint-5.6/perl: 13b98125bf15a4dfacaa2c6f56d3742c97180500
p4raw-link: @8608 on //depot/maint-5.6/perl: f893c726cdaa1ccdec167db9b2ff5c2fdc19e29b

p4raw-id: //depot/perl@8614
p4raw-integrated: from //depot/maint-5.6/perl@8596 'copy in'
	t/lib/dprof/V.pm t/op/flip.t utils/perldoc.PL (@8159..)
	win32/bin/search.pl (@8166..) t/io/tell.t (@8175..)
	hints/hpux.sh (@8601..) thread.h (@8606..) 'ignore'
	pod/perlintern.pod (@7766..) pod/perlapi.pod (@8605..) 'merge
	in' intrpvar.h t/base/term.t (@7895..) win32/vdir.h (@8156..)
	thrdvar.h (@8602..) perlapi.c (@8606..)

13 files changed, 121 insertions, 98 deletions

diff --git a/hints/hpux.sh b/hints/hpux.sh
index ca5c50b3b0..ddcb62feb0 100644
--- a/hints/hpux.sh
+++ b/hints/hpux.sh
@@ -348,9 +348,7 @@ EOM
             fi
 
             # HP-UX 10.X uses the old pthreads API
-            case "$d_oldpthreads" in
-            '') d_oldpthreads="$define" ;;
-            esac
+            d_oldpthreads="$define"
 
             # include libcma before all the others
             libswanted="cma $libswanted"
diff --git a/intrpvar.h b/intrpvar.h
index c9219041cc..8b2aa29321 100644
--- a/intrpvar.h
+++ b/intrpvar.h
@@ -34,7 +34,7 @@ PERLVAR(Iminus_F,	bool)
 PERLVAR(Idoswitches,	bool)
 
 /*
-=for apidoc Amn|bool|PL_dowarn
+=for apidoc mn|bool|PL_dowarn
 
 The C variable which corresponds to Perl's $^W warning variable.
 
@@ -89,20 +89,20 @@ PERLVAR(IDBgv,		GV *)
 PERLVAR(IDBline,	GV *)
 
 /*
-=for apidoc Amn|GV *|PL_DBsub
+=for apidoc mn|GV *|PL_DBsub
 When Perl is run in debugging mode, with the B<-d> switch, this GV contains
 the SV which holds the name of the sub being debugged.  This is the C
 variable which corresponds to Perl's $DB::sub variable.  See
 C<PL_DBsingle>.
 
-=for apidoc Amn|SV *|PL_DBsingle
+=for apidoc mn|SV *|PL_DBsingle
 When Perl is run in debugging mode, with the B<-d> switch, this SV is a
 boolean which indicates whether subs are being single-stepped.
 Single-stepping is automatically turned on after every step.  This is the C
 variable which corresponds to Perl's $DB::single variable.  See
 C<PL_DBsub>.
 
-=for apidoc Amn|SV *|PL_DBtrace
+=for apidoc mn|SV *|PL_DBtrace
 Trace variable used when Perl is run in debugging mode, with the B<-d>
 switch.  This is the C variable which corresponds to Perl's $DB::trace
 variable.  See C<PL_DBsingle>.
diff --git a/pod/perlapi.pod b/pod/perlapi.pod
index 1828b55e29..60cb725cda 100644
--- a/pod/perlapi.pod
+++ b/pod/perlapi.pod
@@ -1482,60 +1482,6 @@ Tells a Perl interpreter to run.  See L<perlembed>.
 =for hackers
 Found in file perl.c
 
-=item PL_DBsingle
-
-When Perl is run in debugging mode, with the B<-d> switch, this SV is a
-boolean which indicates whether subs are being single-stepped.
-Single-stepping is automatically turned on after every step.  This is the C
-variable which corresponds to Perl's $DB::single variable.  See
-C<PL_DBsub>.
-
-	SV *	PL_DBsingle
-
-=for hackers
-Found in file intrpvar.h
-
-=item PL_DBsub
-
-When Perl is run in debugging mode, with the B<-d> switch, this GV contains
-the SV which holds the name of the sub being debugged.  This is the C
-variable which corresponds to Perl's $DB::sub variable.  See
-C<PL_DBsingle>.
-
-	GV *	PL_DBsub
-
-=for hackers
-Found in file intrpvar.h
-
-=item PL_DBtrace
-
-Trace variable used when Perl is run in debugging mode, with the B<-d>
-switch.  This is the C variable which corresponds to Perl's $DB::trace
-variable.  See C<PL_DBsingle>.
-
-	SV *	PL_DBtrace
-
-=for hackers
-Found in file intrpvar.h
-
-=item PL_dowarn
-
-The C variable which corresponds to Perl's $^W warning variable.
-
-	bool	PL_dowarn
-
-=for hackers
-Found in file intrpvar.h
-
-=item PL_last_in_gv
-
-The GV which was last used for a filehandle input operation. (C<< <FH> >>)
-
-	GV*	PL_last_in_gv
-
-=for hackers
-Found in file thrdvar.h
-
 =item PL_modglobal
 
 C<PL_modglobal> is a general purpose, interpreter global HV for use by
@@ -1561,24 +1507,6 @@ C<SvPV_nolen> macro.
 =for hackers
 Found in file thrdvar.h
 
-=item PL_ofs_sv
-
-The output field separator - C<$,> in Perl space.
-
-	SV*	PL_ofs_sv
-
-=for hackers
-Found in file thrdvar.h
-
-=item PL_rs
-
-The input record separator - C<$/> in Perl space.
-
-	SV*	PL_rs
-
-=for hackers
-Found in file thrdvar.h
-
 =item PL_sv_no
 
 This is the C<false> SV.  See C<PL_sv_yes>.  Always refer to this as
@@ -2437,19 +2365,19 @@ false, defined or undefined.  Does not handle 'get' magic.
 =for hackers
 Found in file sv.h
 
-=item SvTYPE
-
-Returns the type of the SV.  See C<svtype>.
+=item svtype
 
-	svtype	SvTYPE(SV* sv)
+An enum of flags for Perl types.  These are found in the file B<sv.h> 
+in the C<svtype> enum.  Test these flags with the C<SvTYPE> macro.
 
 =for hackers
 Found in file sv.h
 
-=item svtype
+=item SvTYPE
 
-An enum of flags for Perl types.  These are found in the file B<sv.h> 
-in the C<svtype> enum.  Test these flags with the C<SvTYPE> macro.
+Returns the type of the SV.  See C<svtype>.
+
+	svtype	SvTYPE(SV* sv)
 
 =for hackers
 Found in file sv.h
diff --git a/pod/perlintern.pod b/pod/perlintern.pod
index 6af18b507c..8bfe5a3cd3 100644
--- a/pod/perlintern.pod
+++ b/pod/perlintern.pod
@@ -46,6 +46,78 @@ True if this op will be the return value of an lvalue subroutine
 =for hackers
 Found in file pp.h
 
+=item PL_DBsingle
+
+When Perl is run in debugging mode, with the B<-d> switch, this SV is a
+boolean which indicates whether subs are being single-stepped.
+Single-stepping is automatically turned on after every step.  This is the C
+variable which corresponds to Perl's $DB::single variable.  See
+C<PL_DBsub>.
+
+	SV *	PL_DBsingle
+
+=for hackers
+Found in file intrpvar.h
+
+=item PL_DBsub
+
+When Perl is run in debugging mode, with the B<-d> switch, this GV contains
+the SV which holds the name of the sub being debugged.  This is the C
+variable which corresponds to Perl's $DB::sub variable.  See
+C<PL_DBsingle>.
+
+	GV *	PL_DBsub
+
+=for hackers
+Found in file intrpvar.h
+
+=item PL_DBtrace
+
+Trace variable used when Perl is run in debugging mode, with the B<-d>
+switch.  This is the C variable which corresponds to Perl's $DB::trace
+variable.  See C<PL_DBsingle>.
+
+	SV *	PL_DBtrace
+
+=for hackers
+Found in file intrpvar.h
+
+=item PL_dowarn
+
+The C variable which corresponds to Perl's $^W warning variable.
+
+	bool	PL_dowarn
+
+=for hackers
+Found in file intrpvar.h
+
+=item PL_last_in_gv
+
+The GV which was last used for a filehandle input operation. (C<< <FH> >>)
+
+	GV*	PL_last_in_gv
+
+=for hackers
+Found in file thrdvar.h
+
+=item PL_ofs_sv
+
+The output field separator - C<$,> in Perl space.
+
+	SV*	PL_ofs_sv
+
+=for hackers
+Found in file thrdvar.h
+
+=item PL_rs
+
+The input record separator - C<$/> in Perl space.
+
+	SV*	PL_rs
+
+=for hackers
+Found in file thrdvar.h
+
 =item start_glob
 
 Function called by C<do_readline> to spawn a glob (or do the glob inside
diff --git a/t/base/term.t b/t/base/term.t
index 49df11fa31..061cd33b1e 100755
--- a/t/base/term.t
+++ b/t/base/term.t
@@ -48,5 +48,5 @@ else {
     die "/dev/null IS NOT A CHARACTER SPECIAL FILE!!!!\n" unless -c '/dev/null';
 }
 
-open(try, "../Configure") || (die "Can't open ../Configure.");
+open(try, "harness") || (die "Can't open harness.");
 if (<try> ne '') {print "ok 7\n";} else {print "not ok 7\n";}
diff --git a/t/io/tell.t b/t/io/tell.t
index 560836d5e0..c840c9232a 100755
--- a/t/io/tell.t
+++ b/t/io/tell.t
@@ -9,7 +9,7 @@ $TST = 'tst';
 $Is_Dosish = ($^O eq 'MSWin32' or $^O eq 'dos' or
 	      $^O eq 'os2' or $^O eq 'mint' or $^O eq 'cygwin');
 
-open($TST, '../Configure') || (die "Can't open ../Configure");
+open($TST, 'harness') || (die "Can't open harness");
 binmode $TST if $Is_Dosish;
 if (eof(tst)) { print "not ok 1\n"; } else { print "ok 1\n"; }
 
@@ -49,7 +49,7 @@ unless (eof) { print "not ok 13\n"; } else { print "ok 13\n"; }
 if ($. == 0) { print "not ok 14\n"; } else { print "ok 14\n"; }
 
 $curline = $.;
-open(other, '../Configure') || (die "Can't open ../Configure");
+open(other, 'harness') || (die "Can't open harness: $!");
 binmode other if $^O eq 'MSWin32';
 
 {
diff --git a/t/lib/dprof/V.pm b/t/lib/dprof/V.pm
index cbdeca4eda..152cddc253 100644
--- a/t/lib/dprof/V.pm
+++ b/t/lib/dprof/V.pm
@@ -17,7 +17,10 @@ $dpp .= '.com' if $^O eq 'VMS';
 
 print "\nperl: $perl\n" if $opt_v;
 if( ! -f $perl ){ die "Where's Perl?" }
-if( ! -f $dpp ){ die "Where's dprofpp?" }
+if( ! -f $dpp ) { 
+    ($dpp = $^X) =~ s@(^.*)[/|\\].*@$1/dprofpp@;
+    die "Where's dprofpp?" if( ! -f $dpp );
+}
 
 sub dprofpp {
 	my $switches = shift;
diff --git a/t/op/flip.t b/t/op/flip.t
index f66af27d4d..99b22eff94 100755
--- a/t/op/flip.t
+++ b/t/op/flip.t
@@ -17,7 +17,7 @@ if ($y eq '12E0123E0') {print "ok 7\n";} else {print "not ok 7\n";}
 
 @a = ('a','b','c','d','e','f','g');
 
-open(of,'../Configure');
+open(of,'harness') or die "Can't open harness: $!";
 while (<of>) {
     (3 .. 5) && ($foo .= $_);
 }
diff --git a/thrdvar.h b/thrdvar.h
index e0fe1052f1..d35c1d9695 100644
--- a/thrdvar.h
+++ b/thrdvar.h
@@ -84,15 +84,15 @@ PERLVAR(Tcurpm,		PMOP *)		/* what to do \ interps in REs from */
 PERLVAR(Tnrs,		SV *)
 
 /*
-=for apidoc Amn|SV*|PL_rs
+=for apidoc mn|SV*|PL_rs
 
 The input record separator - C<$/> in Perl space.
 
-=for apidoc Amn|GV*|PL_last_in_gv
+=for apidoc mn|GV*|PL_last_in_gv
 
 The GV which was last used for a filehandle input operation. (C<< <FH> >>)
 
-=for apidoc Amn|SV*|PL_ofs_sv
+=for apidoc mn|SV*|PL_ofs_sv
 
 The output field separator - C<$,> in Perl space.
 
diff --git a/thread.h b/thread.h
index 9740dbaf26..1923aedb97 100644
--- a/thread.h
+++ b/thread.h
@@ -32,13 +32,23 @@
 #      define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
 #      define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
 #    endif
+#    if defined(__hpux) && defined(__ux_version) && __ux_version <= 1020
+#      define pthread_attr_init(a) pthread_attr_create(a)
+       /* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */
+#      define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
+#      define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
+#      define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
+#      define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
+#    endif
 #    if defined(DJGPP) || defined(__OPEN_VM)
 #      define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
 #      define YIELD pthread_yield(NULL)
 #    endif
 #  endif
+#  if !defined(__hpux) || !defined(__ux_version) || __ux_version > 1020
 #    define pthread_mutexattr_default NULL
 #    define pthread_condattr_default  NULL
+#  endif
 #endif
 
 #ifndef PTHREAD_CREATE
diff --git a/utils/perldoc.PL b/utils/perldoc.PL
index 313be205dd..be2435f745 100644
--- a/utils/perldoc.PL
+++ b/utils/perldoc.PL
@@ -559,7 +559,10 @@ eval q{
     sub END { cleanup($tmp, $buffer) } 
     1;
 } || die;
-eval q{ use sigtrap qw(die INT TERM HUP QUIT) };
+
+# exit/die in a windows sighandler is dangerous, so let it do the
+# default thing, which is to exit
+eval q{ use sigtrap qw(die INT TERM HUP QUIT) } unless $^O eq 'MSWin32';
 
 if ($opt_m) {
     foreach my $pager (@pagers) {
diff --git a/win32/bin/search.pl b/win32/bin/search.pl
index 5c3d65e06e..f647b8426f 100644
--- a/win32/bin/search.pl
+++ b/win32/bin/search.pl
@@ -47,7 +47,12 @@ $version = "950918.5";
 $stripped=0;
 
 &init;
-$rc_file = join('/', $ENV{'HOME'}, ".search");
+if (exists $ENV{'HOME'}) {
+    $rc_file = join('/', $ENV{'HOME'}, ".search");
+}
+else {
+    $rc_file = "";
+}
 
 &check_args;
 
diff --git a/win32/vdir.h b/win32/vdir.h
index af769f1549..2dd7e34cc6 100644
--- a/win32/vdir.h
+++ b/win32/vdir.h
@@ -452,7 +452,9 @@ int VDir::SetCurrentDirectoryA(char *lpBuffer)
     DWORD r = GetFileAttributesA(pPtr);
     if ((r != 0xffffffff) && (r & FILE_ATTRIBUTE_DIRECTORY))
     {
-	SetDefaultDirA(pPtr, DriveIndex(pPtr[0]));
+	char szBuffer[(MAX_PATH+1)*2];
+	DoGetFullPathNameA(pPtr, sizeof(szBuffer), szBuffer);
+	SetDefaultDirA(szBuffer, DriveIndex(szBuffer[0]));
 	nRet = 0;
     }
 
@@ -677,7 +679,9 @@ int VDir::SetCurrentDirectoryW(WCHAR *lpBuffer)
     DWORD r = GetFileAttributesW(pPtr);
     if ((r != 0xffffffff) && (r & FILE_ATTRIBUTE_DIRECTORY))
     {
-	SetDefaultDirW(pPtr, DriveIndex((char)pPtr[0]));
+	WCHAR wBuffer[(MAX_PATH+1)*2];
+	DoGetFullPathNameW(pPtr, (sizeof(wBuffer)/sizeof(WCHAR)), wBuffer);
+	SetDefaultDirW(wBuffer, DriveIndex((char)wBuffer[0]));
 	nRet = 0;
     }