Remove <libc-tsd.h>

Use __thread variables directly instead.  The macros do not save any
typing.  It seems unlikely that a future port will lack __thread
variable support.

Some of the __libc_tsd_* variables are referenced from assembler
files, so keep their names.  Previously, <libc-tls.h> included
<tls.h>, which in turn included <errno.h>, so a few direct includes
of <errno.h> are now required.

Reviewed-by: Frédéric Bérat <fberat@redhat.com>

ctype/ctype-info.c

@@ -19,20 +19,20 @@
 #include <ctype.h>
 #include <locale/localeinfo.h>
 
-__libc_tsd_define (, const uint16_t *, CTYPE_B)
+__thread const uint16_t * __libc_tsd_CTYPE_B;
-__libc_tsd_define (, const int32_t *, CTYPE_TOLOWER)
+__thread const int32_t * __libc_tsd_CTYPE_TOLOWER;
-__libc_tsd_define (, const int32_t *, CTYPE_TOUPPER)
+__thread const int32_t * __libc_tsd_CTYPE_TOUPPER;
 
 
 void
 __ctype_init (void)
 {
-  const uint16_t **bp = __libc_tsd_address (const uint16_t *, CTYPE_B);
+  __libc_tsd_CTYPE_B
-  *bp = (const uint16_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_CLASS) + 128;
+    = ((const uint16_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_CLASS)) + 128;
-  const int32_t **up = __libc_tsd_address (const int32_t *, CTYPE_TOUPPER);
+  __libc_tsd_CTYPE_TOUPPER
-  *up = ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOUPPER) + 128);
+    = ((const int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOUPPER)) + 128;
-  const int32_t **lp = __libc_tsd_address (const int32_t *, CTYPE_TOLOWER);
+  __libc_tsd_CTYPE_TOLOWER =
-  *lp = ((int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOLOWER) + 128);
+    ((const int32_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_TOLOWER)) + 128;
 }
 libc_hidden_def (__ctype_init)
 

include/ctype.h

@@ -24,33 +24,32 @@ libc_hidden_proto (toupper)
    NL_CURRENT_INDIRECT.  */
 
 #  include "../locale/localeinfo.h"
-#  include <libc-tsd.h>
 
 #  ifndef CTYPE_EXTERN_INLINE	/* Used by ctype/ctype-info.c, which see.  */
 #   define CTYPE_EXTERN_INLINE extern inline
 #  endif
 
-__libc_tsd_define (extern, const uint16_t *, CTYPE_B)
+extern __thread const uint16_t * __libc_tsd_CTYPE_B;
-__libc_tsd_define (extern, const int32_t *, CTYPE_TOUPPER)
+extern __thread const int32_t * __libc_tsd_CTYPE_TOUPPER;
-__libc_tsd_define (extern, const int32_t *, CTYPE_TOLOWER)
+extern __thread const int32_t * __libc_tsd_CTYPE_TOLOWER;
 
 
 CTYPE_EXTERN_INLINE const uint16_t ** __attribute__ ((const))
 __ctype_b_loc (void)
 {
-  return __libc_tsd_address (const uint16_t *, CTYPE_B);
+  return &__libc_tsd_CTYPE_B;
 }
 
 CTYPE_EXTERN_INLINE const int32_t ** __attribute__ ((const))
 __ctype_toupper_loc (void)
 {
-  return __libc_tsd_address (const int32_t *, CTYPE_TOUPPER);
+  return &__libc_tsd_CTYPE_TOUPPER;
 }
 
 CTYPE_EXTERN_INLINE const int32_t ** __attribute__ ((const))
 __ctype_tolower_loc (void)
 {
-  return __libc_tsd_address (const int32_t *, CTYPE_TOLOWER);
+  return &__libc_tsd_CTYPE_TOLOWER;
 }
 
 #  ifndef __NO_CTYPE

include/rpc/rpc.h

@@ -3,8 +3,6 @@
 
 # ifndef _ISOMAC
 
-#include <libc-tsd.h>
-
 /* Now define the internal interfaces.  */
 extern unsigned long _create_xid (void);
 
@@ -47,7 +45,7 @@ extern void __rpc_thread_key_cleanup (void) attribute_hidden;
 
 extern void __rpc_thread_destroy (void) attribute_hidden;
 
-__libc_tsd_define (extern, struct rpc_thread_variables *, RPC_VARS)
+extern __thread struct rpc_thread_variables *__libc_tsd_RPC_VARS;
 
 #define RPC_THREAD_VARIABLE(x) (__rpc_thread_variables()->x)
 

locale/lc-ctype.c

@@ -64,12 +64,9 @@ _nl_postload_ctype (void)
      in fact using the global locale.  */
   if (_NL_CURRENT_LOCALE == &_nl_global_locale)
     {
-      __libc_tsd_set (const uint16_t *, CTYPE_B,
+      __libc_tsd_CTYPE_B = _nl_global_locale.__ctype_b;
-		      (void *) _nl_global_locale.__ctype_b);
+      __libc_tsd_CTYPE_TOUPPER = _nl_global_locale.__ctype_toupper;
-      __libc_tsd_set (const int32_t *, CTYPE_TOUPPER,
+      __libc_tsd_CTYPE_TOLOWER = _nl_global_locale.__ctype_tolower;
-		      (void *) _nl_global_locale.__ctype_toupper);
-      __libc_tsd_set (const int32_t *, CTYPE_TOLOWER,
-		      (void *) _nl_global_locale.__ctype_tolower);
     }
 
 #include <shlib-compat.h>

locale/localeinfo.h

@@ -236,10 +236,8 @@ extern struct __locale_struct _nl_global_locale attribute_hidden;
 
 /* This fetches the thread-local locale_t pointer, either one set with
    uselocale or &_nl_global_locale.  */
-#define _NL_CURRENT_LOCALE	(__libc_tsd_get (locale_t, LOCALE))
+#define _NL_CURRENT_LOCALE	__libc_tsd_LOCALE
-#include <libc-tsd.h>
+extern __thread locale_t __libc_tsd_LOCALE;
-__libc_tsd_define (extern, locale_t, LOCALE)
-
 
 /* For static linking it is desireable to avoid always linking in the code
    and data for every category when we can tell at link time that they are

locale/uselocale.c

@@ -34,7 +34,7 @@ __uselocale (locale_t newloc)
     {
       const locale_t locobj
 	= newloc == LC_GLOBAL_LOCALE ? &_nl_global_locale : newloc;
-      __libc_tsd_set (locale_t, LOCALE, locobj);
+      __libc_tsd_LOCALE = locobj;
 
 #ifdef NL_CURRENT_INDIRECT
       /* Now we must update all the per-category thread-local variables to
@@ -62,11 +62,9 @@ __uselocale (locale_t newloc)
 #endif
 
       /* Update the special tsd cache of some locale data.  */
-      __libc_tsd_set (const uint16_t *, CTYPE_B, (void *) locobj->__ctype_b);
+      __libc_tsd_CTYPE_B = locobj->__ctype_b;
-      __libc_tsd_set (const int32_t *, CTYPE_TOLOWER,
+      __libc_tsd_CTYPE_TOLOWER = locobj->__ctype_tolower;
-		      (void *) locobj->__ctype_tolower);
+      __libc_tsd_CTYPE_TOUPPER = locobj->__ctype_toupper;
-      __libc_tsd_set (const int32_t *, CTYPE_TOUPPER,
-		      (void *) locobj->__ctype_toupper);
     }
 
   return oldloc == &_nl_global_locale ? LC_GLOBAL_LOCALE : oldloc;

stdio-common/printf-parsemb.c

@@ -17,6 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <ctype.h>
+#include <errno.h>
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>

string/strerror.c

@@ -21,5 +21,5 @@
 char *
 strerror (int errnum)
 {
-  return __strerror_l (errnum, __libc_tsd_get (locale_t, LOCALE));
+  return __strerror_l (errnum, __libc_tsd_LOCALE);
 }

sunrpc/rpc_thread.c

@@ -3,7 +3,6 @@
 #include <assert.h>
 
 #include <libc-lock.h>
-#include <libc-tsd.h>
 #include <shlib-compat.h>
 #include <libc-symbols.h>
 

sysdeps/generic/libc-tsd.h

@@ -1,60 +0,0 @@
-/* libc-internal interface for thread-specific data.  Stub or TLS version.
-   Copyright (C) 1998-2025 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/>.  */
-
-#ifndef _GENERIC_LIBC_TSD_H
-#define _GENERIC_LIBC_TSD_H 1
-
-/* This file defines the following macros for accessing a small fixed
-   set of thread-specific `void *' data used only internally by libc.
-
-   __libc_tsd_define(CLASS, TYPE, KEY)	-- Define or declare a datum with TYPE
-					   for KEY.  CLASS can be `static' for
-					   keys used in only one source file,
-					   empty for global definitions, or
-					   `extern' for global declarations.
-   __libc_tsd_address(TYPE, KEY)	-- Return the `TYPE *' pointing to
-					   the current thread's datum for KEY.
-   __libc_tsd_get(TYPE, KEY)		-- Return the `TYPE' datum for KEY.
-   __libc_tsd_set(TYPE, KEY, VALUE)	-- Set the datum for KEY to VALUE.
-
-   The set of available KEY's will usually be provided as an enum,
-   and contains (at least):
-		_LIBC_TSD_KEY_MALLOC
-		_LIBC_TSD_KEY_DL_ERROR
-		_LIBC_TSD_KEY_RPC_VARS
-   All uses must be the literal _LIBC_TSD_* name in the __libc_tsd_* macros.
-   Some implementations may not provide any enum at all and instead
-   using string pasting in the macros.  */
-
-#include <tls.h>
-
-/* When full support for __thread variables is available, this interface is
-   just a trivial wrapper for it.  Without TLS, this is the generic/stub
-   implementation for wholly single-threaded systems.
-
-   We don't define an enum for the possible key values, because the KEYs
-   translate directly into variables by macro magic.  */
-
-#define __libc_tsd_define(CLASS, TYPE, KEY)	\
-  CLASS __thread TYPE __libc_tsd_##KEY attribute_tls_model_ie;
-
-#define __libc_tsd_address(TYPE, KEY)		(&__libc_tsd_##KEY)
-#define __libc_tsd_get(TYPE, KEY)		(__libc_tsd_##KEY)
-#define __libc_tsd_set(TYPE, KEY, VALUE)	(__libc_tsd_##KEY = (VALUE))
-
-#endif	/* libc-tsd.h */

time/strftime_l.c

@@ -40,6 +40,7 @@
 #endif
 
 #include <ctype.h>
+#include <errno.h>
 #include <sys/types.h>		/* Some systems define `time_t' here.  */
 
 #ifdef TIME_WITH_SYS_TIME