Make various error-related globals thread-local

This changes bfd_error et al to be thread-local.

	* Makefile.in: Regenerate.
	* aclocal.m4: Include ax_tls.m4.
	* ax_tls.m4: New file.
	* bfd.c: (bfd_error, input_error, input_bfd, _bfd_error_buf):
	Now thread-local.
	(bfd_asprintf): Update docs.
	* config.in, configure: Regenerate.
	* configure.ac: Call AX_TLS.
	* po/bfd.pot: Regenerate.

bfd/Makefile.in

@@ -129,9 +129,9 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
 	$(top_srcdir)/../config/zstd.m4 $(top_srcdir)/../libtool.m4 \
 	$(top_srcdir)/../ltoptions.m4 $(top_srcdir)/../ltsugar.m4 \
 	$(top_srcdir)/../ltversion.m4 $(top_srcdir)/../lt~obsolete.m4 \
-	$(top_srcdir)/bfd.m4 $(top_srcdir)/warning.m4 \
+	$(top_srcdir)/ax_tls.m4 $(top_srcdir)/bfd.m4 \
-	$(top_srcdir)/acinclude.m4 $(top_srcdir)/version.m4 \
+	$(top_srcdir)/warning.m4 $(top_srcdir)/acinclude.m4 \
-	$(top_srcdir)/configure.ac
+	$(top_srcdir)/version.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
 DIST_COMMON = $(srcdir)/Makefile.am $(top_srcdir)/configure \

bfd/aclocal.m4

@@ -1187,6 +1187,7 @@ m4_include([../ltoptions.m4])
 m4_include([../ltsugar.m4])
 m4_include([../ltversion.m4])
 m4_include([../lt~obsolete.m4])
+m4_include([ax_tls.m4])
 m4_include([bfd.m4])
 m4_include([warning.m4])
 m4_include([acinclude.m4])

bfd/ax_tls.m4

@@ -0,0 +1,71 @@
+# ===========================================================================
+#          https://www.gnu.org/software/autoconf-archive/ax_tls.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_TLS([action-if-found], [action-if-not-found])
+#
+# DESCRIPTION
+#
+#   Provides a test for the compiler support of thread local storage (TLS)
+#   extensions. Defines TLS if it is found. Currently knows about C++11,
+#   GCC/ICC, and MSVC. I think SunPro uses the same as GCC, and Borland
+#   apparently supports either.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Alan Woodland <ajw05@aber.ac.uk>
+#   Copyright (c) 2010 Diego Elio Petteno` <flameeyes@gmail.com>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program 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 General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 15
+
+AC_DEFUN([AX_TLS], [
+  AC_MSG_CHECKING([for thread local storage (TLS) class])
+  AC_CACHE_VAL([ac_cv_tls],
+   [for ax_tls_keyword in thread_local _Thread_local __thread '__declspec(thread)' none; do
+       AS_CASE([$ax_tls_keyword],
+          [none], [ac_cv_tls=none ; break],
+          [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+              [#include <stdlib.h>],
+              [static  $ax_tls_keyword  int bar;]
+            )],
+            [ac_cv_tls=$ax_tls_keyword ; break],
+            [ac_cv_tls=none]
+          )]
+        )
+    done ]
+  )
+  AC_MSG_RESULT([$ac_cv_tls])
+
+  AS_IF([test "$ac_cv_tls" != "none"],
+    [AC_DEFINE_UNQUOTED([TLS],[$ac_cv_tls],[If the compiler supports a TLS storage class, define it to that here])
+     m4_ifnblank([$1],[$1],[[:]])],
+    [m4_ifnblank([$2],[$2],[[:]])])
+])

bfd/bfd.c

@@ -691,6 +691,8 @@ SECTION
 	The easiest way to report a BFD error to the user is to
 	use <<bfd_perror>>.
 
+	The BFD error is thread-local.
+
 SUBSECTION
 	Type <<bfd_error_type>>
 
@@ -728,10 +730,10 @@ CODE_FRAGMENT
 .
 */
 
-static bfd_error_type bfd_error;
+static TLS bfd_error_type bfd_error;
-static bfd_error_type input_error;
+static TLS bfd_error_type input_error;
-static bfd *input_bfd;
+static TLS bfd *input_bfd;
-static char *_bfd_error_buf;
+static TLS char *_bfd_error_buf;
 
 const char *const bfd_errmsgs[] =
 {
@@ -920,7 +922,7 @@ DESCRIPTION
 	Primarily for error reporting, this function is like
 	libiberty's xasprintf except that it can return NULL on no
 	memory and the returned string should not be freed.  Uses a
-	single malloc'd buffer managed by libbfd, _bfd_error_buf.
+	thread-local malloc'd buffer managed by libbfd, _bfd_error_buf.
 	Be aware that a call to this function frees the result of any
 	previous call.  bfd_errmsg (bfd_error_on_input) also calls
 	this function.

bfd/config.in

@@ -285,6 +285,9 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
+/* If the compiler supports a TLS storage class, define it to that here */
+#undef TLS
+
 /* Name of host specific header file to include in trad-core.c. */
 #undef TRAD_HEADER
 

bfd/configure

@@ -13283,6 +13283,57 @@ $as_echo "#define USE_BINARY_FOPEN 1" >>confdefs.h
  ;;
 esac
 
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for thread local storage (TLS) class" >&5
+$as_echo_n "checking for thread local storage (TLS) class... " >&6; }
+  if ${ac_cv_tls+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  for ax_tls_keyword in thread_local _Thread_local __thread '__declspec(thread)' none; do
+       case $ax_tls_keyword in #(
+  none) :
+    ac_cv_tls=none ; break ;; #(
+  *) :
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <stdlib.h>
+int
+main ()
+{
+static  $ax_tls_keyword  int bar;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_tls=$ax_tls_keyword ; break
+else
+  ac_cv_tls=none
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+         ;;
+esac
+    done
+
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_tls" >&5
+$as_echo "$ac_cv_tls" >&6; }
+
+  if test "$ac_cv_tls" != "none"; then :
+
+cat >>confdefs.h <<_ACEOF
+#define TLS $ac_cv_tls
+_ACEOF
+
+     :
+else
+  :
+fi
+
+
 # Link in zlib/zstd if we can.  This allows us to read compressed debug sections.
 # This is used only by compress.c.
 

bfd/configure.ac

@@ -233,6 +233,8 @@ AC_CHECK_DECLS([___lc_codepage_func], [], [], [[#include <locale.h>]])
 
 BFD_BINARY_FOPEN
 
+AX_TLS
+
 # Link in zlib/zstd if we can.  This allows us to read compressed debug sections.
 # This is used only by compress.c.
 AM_ZLIB

bfd/po/bfd.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://sourceware.org/bugzilla/\n"
-"POT-Creation-Date: 2023-11-07 17:27-0700\n"
+"POT-Creation-Date: 2023-11-07 17:40-0700\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -138,115 +138,115 @@ msgstr ""
 msgid "Writing updated armap timestamp"
 msgstr ""
 
-#: bfd.c:738
+#: bfd.c:740
 msgid "no error"
 msgstr ""
 
-#: bfd.c:739
+#: bfd.c:741
 msgid "system call error"
 msgstr ""
 
-#: bfd.c:740
+#: bfd.c:742
 msgid "invalid bfd target"
 msgstr ""
 
-#: bfd.c:741
+#: bfd.c:743
 msgid "file in wrong format"
 msgstr ""
 
-#: bfd.c:742
+#: bfd.c:744
 msgid "archive object file in wrong format"
 msgstr ""
 
-#: bfd.c:743
+#: bfd.c:745
 msgid "invalid operation"
 msgstr ""
 
-#: bfd.c:744
+#: bfd.c:746
 msgid "memory exhausted"
 msgstr ""
 
-#: bfd.c:745
+#: bfd.c:747
 msgid "no symbols"
 msgstr ""
 
-#: bfd.c:746
+#: bfd.c:748
 msgid "archive has no index; run ranlib to add one"
 msgstr ""
 
-#: bfd.c:747
+#: bfd.c:749
 msgid "no more archived files"
 msgstr ""
 
-#: bfd.c:748
+#: bfd.c:750
 msgid "malformed archive"
 msgstr ""
 
-#: bfd.c:749
+#: bfd.c:751
 msgid "DSO missing from command line"
 msgstr ""
 
-#: bfd.c:750
+#: bfd.c:752
 msgid "file format not recognized"
 msgstr ""
 
-#: bfd.c:751
+#: bfd.c:753
 msgid "file format is ambiguous"
 msgstr ""
 
-#: bfd.c:752
+#: bfd.c:754
 msgid "section has no contents"
 msgstr ""
 
-#: bfd.c:753
+#: bfd.c:755
 msgid "nonrepresentable section on output"
 msgstr ""
 
-#: bfd.c:754
+#: bfd.c:756
 msgid "symbol needs debug section which does not exist"
 msgstr ""
 
-#: bfd.c:755
+#: bfd.c:757
 msgid "bad value"
 msgstr ""
 
-#: bfd.c:756
+#: bfd.c:758
 msgid "file truncated"
 msgstr ""
 
-#: bfd.c:757
+#: bfd.c:759
 msgid "file too big"
 msgstr ""
 
-#: bfd.c:758
+#: bfd.c:760
 msgid "sorry, cannot handle this file"
 msgstr ""
 
-#: bfd.c:759
+#: bfd.c:761
 #, c-format
 msgid "error reading %s: %s"
 msgstr ""
 
-#: bfd.c:760
+#: bfd.c:762
 msgid "#<invalid error code>"
 msgstr ""
 
-#: bfd.c:1890
+#: bfd.c:1892
 #, c-format
 msgid "BFD %s assertion fail %s:%d"
 msgstr ""
 
-#: bfd.c:1903
+#: bfd.c:1905
 #, c-format
 msgid "BFD %s internal error, aborting at %s:%d in %s\n"
 msgstr ""
 
-#: bfd.c:1908
+#: bfd.c:1910
 #, c-format
 msgid "BFD %s internal error, aborting at %s:%d\n"
 msgstr ""
 
-#: bfd.c:1910
+#: bfd.c:1912
 msgid "Please report this bug.\n"
 msgstr ""