htl: Enable more tests

* htl/Makefile: Remove rules adding libpthread.so and libpthread.a to link
lines.
* nptl/Makefile: Move rules adding libpthread.so and libpthread.a to
link lines to...
* sysdeps/pthread/Makefile: ... here.

* nptl/eintr.c, tst-align.c tst-align3.c tst-atfork1.c tst-backtrace1.c
tst-bad-schedattr.c tst-cancel-self-canceltype.c tst-cancel-self-cleanup.c
tst-cancel-self-testcancel.c tst-cancel1.c tst-cancel10.c tst-cancel12.c
tst-cancel14.c tst-cancel15.c tst-cancel18.c tst-cancel19.c tst-cancel2.c
tst-cancel22.c tst-cancel23.c tst-cancel26.c tst-cancel27.c tst-cancel28.c
tst-cancel3.c tst-cancel8.c tst-cancelx1.c tst-cancelx10.c tst-cancelx12.c
tst-cancelx14.c tst-cancelx15.c tst-cancelx18.c tst-cancelx2.c tst-cancelx3.c
tst-cancelx8.c tst-cleanup0.c tst-cleanup0.expect tst-cleanup1.c tst-cleanup2.c
tst-cleanup3.c tst-cleanupx0.c tst-cleanupx0.expect tst-cleanupx1.c
tst-cleanupx2.c tst-cleanupx3.c tst-clock1.c tst-create-detached.c tst-detach1.c
tst-eintr2.c tst-eintr3.c tst-eintr4.c tst-eintr5.c tst-exec1.c tst-exec2.c
tst-exec3.c tst-exit1.c tst-exit2.c tst-exit3.c tst-flock1.c tst-fork1.c
tst-fork2.c tst-fork3.c tst-fork4.c tst-getpid3.c tst-kill1.c tst-kill2.c
tst-kill3.c tst-kill4.c tst-kill5.c tst-kill6.c tst-locale1.c tst-locale2.c
tst-memstream.c tst-popen1.c tst-raise1.c tst-sem5.c tst-setuid3.c tst-signal4.c
tst-signal5.c tst-signal6.c tst-signal8.c tst-stack1.c tst-stdio1.c tst-stdio2.c
tst-sysconf.c tst-tls1.c tst-tls2.c tst-tsd1.c tst-tsd2.c tst-tsd5.c tst-tsd6.c
tst-umask1.c tst-unload.c tst-unwind-thread.c tst-vfork1.c tst-vfork1x.c
tst-vfork2.c tst-vfork2x.c: Move tests to...
* sysdeps/pthread: ... here.
Rename
tst-popen1.c -> tst-pt-popen1.c
tst-align.c -> tst-pt-align.c
tst-align3.c -> tst-pt-align3.c
tst-sysconf.c -> tst-pt-sysconf.c
tst-tls1.c -> tst-pt-tls1.c
tst-tls2.c -> tst-pt-tls2.c
tst-vfork1.c -> tst-pt-vfork1.c
tst-vfork2.c -> tst-pt-vfork2.c
to avoid conflicting with libio/tst-popen1.c, elf/tst-align.c,
posix/tst-sysconf.c, elf/tst-tls1.c, elf/tst-tls2.c, posix/tst-vfork1.c,
posix/tst-vfork2.c.

* nptl/Makefile: Move corresponding tests references and special rules to...
* sysdeps/pthread/Makefile: ... here.

* sysdeps/pthread/tst-stack1.c (do_test): Do not clamp stack size to
PTHREAD_STACK_MIN if not defined.

Tested on linux-x86_64 and hurd-i386

sysdeps/pthread/eintr.c

@@ -0,0 +1,86 @@
+/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+#include <signal.h>
+#include <unistd.h>
+#include <support/xthread.h>
+#include <support/xsignal.h>
+#include <support/xthread.h>
+
+
+static int the_sig;
+
+
+static void
+eintr_handler (int sig)
+{
+  if (sig != the_sig)
+    {
+      write (STDOUT_FILENO, "eintr_handler: signal number wrong\n", 35);
+      _exit (1);
+    }
+  write (STDOUT_FILENO, ".", 1);
+}
+
+
+static void *
+eintr_source (void *arg)
+{
+  struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000 };
+
+  if (arg == NULL)
+    {
+      sigset_t ss;
+      sigemptyset (&ss);
+      sigaddset (&ss, the_sig);
+      xpthread_sigmask (SIG_BLOCK, &ss, NULL);
+    }
+
+  while (1)
+    {
+      if (arg != NULL)
+	pthread_kill (*(pthread_t *) arg, the_sig);
+      else
+	kill (getpid (), the_sig);
+
+      nanosleep (&ts, NULL);
+    }
+
+  /* NOTREACHED */
+  return NULL;
+}
+
+
+static void
+setup_eintr (int sig, pthread_t *thp)
+{
+  struct sigaction sa;
+  sigemptyset (&sa.sa_mask);
+  sa.sa_flags = 0;
+  sa.sa_handler = eintr_handler;
+  if (sigaction (sig, &sa, NULL) != 0)
+    {
+      puts ("setup_eintr: sigaction failed");
+      exit (1);
+    }
+  the_sig = sig;
+
+  /* Create the thread which will fire off the signals.  */
+  xpthread_create (NULL, eintr_source, thp);
+}