Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN)

The constant PTHREAD_STACK_MIN may be too small for some processors.
Rename _SC_SIGSTKSZ_SOURCE to _DYNAMIC_STACK_SIZE_SOURCE.  When
_DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined, define
PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN) which is changed
to MIN (PTHREAD_STACK_MIN, sysconf(_SC_MINSIGSTKSZ)).

Consolidate <bits/local_lim.h> with <bits/pthread_stack_min.h> to
provide a constant target specific PTHREAD_STACK_MIN value.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

2 files changed, 20 insertions, 99 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h b/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
deleted file mode 100644
index 523407dc48..0000000000
--- a/sysdeps/unix/sysv/linux/alpha/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  Linux/Alpha version.
-   Copyright (C) 1993-2021 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library.  If not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* The kernel header pollutes the namespace with the NR_OPEN symbol
-   and defines LINK_MAX although filesystems have different maxima.  A
-   similar thing is true for OPEN_MAX: the limit can be changed at
-   runtime and therefore the macro must not be defined.  Remove this
-   after including the header if necessary.  */
-#ifndef NR_OPEN
-# define __undef_NR_OPEN
-#endif
-#ifndef LINK_MAX
-# define __undef_LINK_MAX
-#endif
-#ifndef OPEN_MAX
-# define __undef_OPEN_MAX
-#endif
-#ifndef ARG_MAX
-# define __undef_ARG_MAX
-#endif
-
-/* The kernel sources contain a file with all the needed information.  */
-#include <linux/limits.h>
-
-/* Have to remove NR_OPEN?  */
-#ifdef __undef_NR_OPEN
-# undef NR_OPEN
-# undef __undef_NR_OPEN
-#endif
-/* Have to remove LINK_MAX?  */
-#ifdef __undef_LINK_MAX
-# undef LINK_MAX
-# undef __undef_LINK_MAX
-#endif
-/* Have to remove OPEN_MAX?  */
-#ifdef __undef_OPEN_MAX
-# undef OPEN_MAX
-# undef __undef_OPEN_MAX
-#endif
-/* Have to remove ARG_MAX?  */
-#ifdef __undef_ARG_MAX
-# undef ARG_MAX
-# undef __undef_ARG_MAX
-#endif
-
-/* The number of data keys per process.  */
-#define _POSIX_THREAD_KEYS_MAX	128
-/* This is the value this implementation supports.  */
-#define PTHREAD_KEYS_MAX	1024
-
-/* Controlling the iterations of destructors for thread-specific data.  */
-#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS	4
-/* Number of iterations this implementation does.  */
-#define PTHREAD_DESTRUCTOR_ITERATIONS	_POSIX_THREAD_DESTRUCTOR_ITERATIONS
-
-/* The number of threads per process.  */
-#define _POSIX_THREAD_THREADS_MAX	64
-/* We have no predefined limit on the number of threads.  */
-#undef PTHREAD_THREADS_MAX
-
-/* Maximum amount by which a process can descrease its asynchronous I/O
-   priority level.  */
-#define AIO_PRIO_DELTA_MAX	20
-
-/* Minimum size for a thread.  We are free to choose a reasonable value.  */
-#define PTHREAD_STACK_MIN	24576
-
-/* Maximum number of timer expiration overruns.  */
-#define DELAYTIMER_MAX	2147483647
-
-/* Maximum tty name length.  */
-#define TTY_NAME_MAX		32
-
-/* Maximum login name length.  This is arbitrary.  */
-#define LOGIN_NAME_MAX		256
-
-/* Maximum host name length.  */
-#define HOST_NAME_MAX		64
-
-/* Maximum message queue priority level.  */
-#define MQ_PRIO_MAX		32768
-
-/* Maximum value the semaphore can have.  */
-#define SEM_VALUE_MAX   (2147483647)
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..5bfb0e10dd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux/Alpha version.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* Minimum size for a thread.  We are free to choose a reasonable value.  */
+#define PTHREAD_STACK_MIN	24576