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>

19 files changed, 223 insertions, 605 deletions

diff --git a/sysdeps/posix/sysconf-pthread_stack_min.h b/sysdeps/posix/sysconf-pthread_stack_min.h
new file mode 100644
index 0000000000..f5be2e6f9f
--- /dev/null
+++ b/sysdeps/posix/sysconf-pthread_stack_min.h
@@ -0,0 +1,29 @@
+/* __get_pthread_stack_min ().  POSIX 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 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/>.  */
+
+/* Return sysconf (_SC_THREAD_STACK_MIN).  */
+
+static inline long int
+__get_pthread_stack_min (void)
+{
+#ifdef	PTHREAD_STACK_MIN
+      return PTHREAD_STACK_MIN;
+#else
+      return -1;
+#endif
+}
diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c
index 3e8ec5cd51..5fb3fb6c1c 100644
--- a/sysdeps/posix/sysconf.c
+++ b/sysdeps/posix/sysconf.c
@@ -31,6 +31,7 @@
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <regex.h>
+#include <sysconf-pthread_stack_min.h>
 
 #define NEED_SPEC_ARRAY 0
 #include <posix-conf-vars.h>
@@ -569,11 +570,7 @@ __sysconf (int name)
 #endif
 
     case _SC_THREAD_STACK_MIN:
-#ifdef	PTHREAD_STACK_MIN
-      return PTHREAD_STACK_MIN;
-#else
-      return -1;
-#endif
+      return __get_pthread_stack_min ();
 
     case _SC_THREAD_THREADS_MAX:
 #ifdef	PTHREAD_THREADS_MAX
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index d45a16af8b..7d43dc95f2 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -108,7 +108,8 @@ sysdep_headers += sys/mount.h sys/acct.h \
 		  bits/types/struct_semid64_ds.h \
 		  bits/types/struct_semid64_ds_helper.h \
 		  bits/types/struct_shmid64_ds.h \
-		  bits/types/struct_shmid64_ds_helper.h
+		  bits/types/struct_shmid64_ds_helper.h \
+		  bits/pthread_stack_min.h
 
 tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
 	 tst-quota tst-sync_file_range tst-sysconf-iov_max tst-ttyname \
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h b/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h
deleted file mode 100644
index 0652bf4a06..0000000000
--- a/sysdeps/unix/sysv/linux/aarch64/bits/local_lim.h
+++ /dev/null
@@ -1,101 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  Linux 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 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/>.  */
-
-/* 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.  At least two pages for systems with 64k
-   pages.  */
-#define PTHREAD_STACK_MIN	131072
-
-/* 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/aarch64/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..97215687ad
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/bits/pthread_stack_min.h
@@ -0,0 +1,22 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux/aarch64 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 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/>.  */
+
+/* Minimum size for a thread.  At least two pages for systems with 64k
+   pages.  */
+#define PTHREAD_STACK_MIN	131072
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
diff --git a/sysdeps/unix/sysv/linux/bits/local_lim.h b/sysdeps/unix/sysv/linux/bits/local_lim.h
index b88ca3d4d2..0b1c7f40be 100644
--- a/sysdeps/unix/sysv/linux/bits/local_lim.h
+++ b/sysdeps/unix/sysv/linux/bits/local_lim.h
@@ -78,7 +78,13 @@
 #define AIO_PRIO_DELTA_MAX	20
 
 /* Minimum size for a thread.  We are free to choose a reasonable value.  */
-#define PTHREAD_STACK_MIN	16384
+#undef PTHREAD_STACK_MIN
+#if defined __USE_DYNAMIC_STACK_SIZE && __USE_DYNAMIC_STACK_SIZE
+# include <unistd.h>
+# define PTHREAD_STACK_MIN	sysconf (_SC_THREAD_STACK_MIN)
+#else
+# include <bits/pthread_stack_min.h>
+#endif
 
 /* Maximum number of timer expiration overruns.  */
 #define DELAYTIMER_MAX	2147483647
diff --git a/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..7bd6fa1242
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux 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 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/>.  */
+
+/* Minimum size for a thread.  We are free to choose a reasonable value.  */
+#define PTHREAD_STACK_MIN	16384
diff --git a/sysdeps/unix/sysv/linux/bits/sigstksz.h b/sysdeps/unix/sysv/linux/bits/sigstksz.h
index 926508f2b4..cd45d122e0 100644
--- a/sysdeps/unix/sysv/linux/bits/sigstksz.h
+++ b/sysdeps/unix/sysv/linux/bits/sigstksz.h
@@ -20,7 +20,7 @@
 # error "Never include <bits/sigstksz.h> directly; use <signal.h> instead."
 #endif
 
-#if defined __USE_SC_SIGSTKSZ && __USE_SC_SIGSTKSZ
+#if defined __USE_DYNAMIC_STACK_SIZE && __USE_DYNAMIC_STACK_SIZE
 # include <unistd.h>
 
 /* Default stack size for a signal handler: sysconf (SC_SIGSTKSZ).  */
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h b/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
deleted file mode 100644
index 7a9f677ec8..0000000000
--- a/sysdeps/unix/sysv/linux/ia64/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  Linux/IA-64 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 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/>.  */
-
-/* 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	196608
-
-/* 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/ia64/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..73581506b2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/ia64/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux/IA-64 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 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/>.  */
+
+/* Minimum size for a thread.  We are free to choose a reasonable value.  */
+#define PTHREAD_STACK_MIN	196608
diff --git a/sysdeps/unix/sysv/linux/mips/bits/local_lim.h b/sysdeps/unix/sysv/linux/mips/bits/local_lim.h
deleted file mode 100644
index a6a0d8a980..0000000000
--- a/sysdeps/unix/sysv/linux/mips/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  MIPS Linux 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 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/>.  */
-
-/* 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.  At least two pages with 64k pages.  */
-#define PTHREAD_STACK_MIN	131072
-
-/* 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/mips/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..132f1704a5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mips/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN.  MIPS Linux 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 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/>.  */
+
+/* Minimum size for a thread.  At least two pages with 64k pages.  */
+#define PTHREAD_STACK_MIN	131072
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h b/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
deleted file mode 100644
index 6caa627506..0000000000
--- a/sysdeps/unix/sysv/linux/powerpc/bits/local_lim.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  Linux/PPC 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 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; see the file COPYING.LIB.  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.  At least two pages for systems with 64k
-   pages.  */
-#define PTHREAD_STACK_MIN	131072
-
-/* 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/powerpc/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..d7017e7b24
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/pthread_stack_min.h
@@ -0,0 +1,21 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux/PPC 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 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; see the file COPYING.LIB.  If
+   not, see <https://www.gnu.org/licenses/>.  */
+
+/* Minimum size for a thread.  At least two pages for systems with 64k
+   pages.  */
+#define PTHREAD_STACK_MIN	131072
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h b/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
deleted file mode 100644
index 4a9a8c1325..0000000000
--- a/sysdeps/unix/sysv/linux/sparc/bits/local_lim.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/* Minimum guaranteed maximum values for system limits.  Linux/SPARC 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; see the file COPYING.LIB.  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/sparc/bits/pthread_stack_min.h b/sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h
new file mode 100644
index 0000000000..bcacedb73b
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc/bits/pthread_stack_min.h
@@ -0,0 +1,20 @@
+/* Definition of PTHREAD_STACK_MIN.  Linux/SPARC 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; see the file COPYING.LIB.  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
diff --git a/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h b/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h
new file mode 100644
index 0000000000..9e0eb0f7fc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sysconf-pthread_stack_min.h
@@ -0,0 +1,39 @@
+/* __get_pthread_stack_min ().  Linux 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 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/>.  */
+
+/* Return sysconf (_SC_THREAD_STACK_MIN).  */
+
+static inline long int
+__get_pthread_stack_min (void)
+{
+  /* sysconf (_SC_THREAD_STACK_MIN) >= sysconf (_SC_MINSIGSTKSZ).  */
+  long int pthread_stack_min = GLRO(dl_minsigstacksize);
+  assert (pthread_stack_min != 0);
+  _Static_assert (__builtin_constant_p (PTHREAD_STACK_MIN),
+		  "PTHREAD_STACK_MIN is constant");
+  /* Return MAX (PTHREAD_STACK_MIN, pthread_stack_min).  */
+  if (pthread_stack_min < PTHREAD_STACK_MIN)
+    pthread_stack_min = PTHREAD_STACK_MIN;
+  /* We have a private interface, __pthread_get_minstack@GLIBC_PRIVATE
+     which returns a larger size that includes the required TLS variable
+     space which has been determined at startup.  For sysconf here we are
+     conservative and don't include the space required for TLS access.
+     Eventually the TLS variable space will not be part of the stack
+     (Bug 11787).  */
+  return pthread_stack_min;
+}