diff --git a/configure.ac b/configure.ac
index f13b14c..c75d994 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,762 +1,771 @@
 # configure.ac for libgpg-error
 # Copyright (C) 2003, 2004, 2006, 2010, 2013-2020 g10 Code GmbH
 #
 # This file is part of libgpg-error.
 #
 # libgpg-error 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.
 #
 # libgpg-error 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 General Public License
 # along with this program; if not, see <https://www.gnu.org/licenses/>.
 # SPDX-License-Identifier: LGPL-2.1+
 
 # (Process this file with autoconf to produce a configure script.)
 # The following lines are used by ./autogen.sh.
 AC_PREREQ([2.59])
 min_automake_version="1.14"
 
 # To build a release you need to create a tag with the version number
 # (git tag -s libgpg-error-n.m) and run "./autogen.sh --force".
 # Please bump the version number immediately after the release, do
 # another commit, and a push so that the git magic is able to work.
 # See below for the LT versions.
 m4_define([mym4_package],[libgpg-error])
 m4_define([mym4_major], [1])
 m4_define([mym4_minor], [44])
 
 # Below is m4 magic to extract and compute the revision number, the
 # decimalized short revision number, a beta version string, and a flag
 # indicating a development version (mym4_isgit). Note that the m4
 # processing is done by autoconf and not during the configure run.
 m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \
                            mym4_package mym4_major mym4_minor),[:]))
 m4_define([mym4_isbeta],       m4_argn(2, mym4_verslist))
 m4_define([mym4_version],      m4_argn(4, mym4_verslist))
 m4_define([mym4_revision],     m4_argn(7, mym4_verslist))
 m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))
 m4_esyscmd([echo ]mym4_version[>VERSION])
 AC_INIT([mym4_package],[mym4_version],[https://bugs.gnupg.org])
 # LT Version numbers, remember to change them just *before* a release.
 #   (Code changed:			REVISION++)
 #   (Interfaces added/removed/changed:	CURRENT++, REVISION=0)
 #   (Interfaces added:			AGE++)
 #   (Interfaces removed:		AGE=0)
 # Note that added error codes don't constitute an interface change.
 LIBGPG_ERROR_LT_CURRENT=32
 LIBGPG_ERROR_LT_AGE=32
 LIBGPG_ERROR_LT_REVISION=1
 ################################################
 
 AC_SUBST(LIBGPG_ERROR_LT_CURRENT)
 AC_SUBST(LIBGPG_ERROR_LT_AGE)
 AC_SUBST(LIBGPG_ERROR_LT_REVISION)
 
 VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x00" mym4_major mym4_minor)
 AC_SUBST(VERSION_NUMBER)
 
 AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([serial-tests dist-bzip2])
 AM_MAINTAINER_MODE
 AC_CONFIG_SRCDIR([src/err-sources.h.in])
 AC_CONFIG_HEADER([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 AM_SILENT_RULES
 
 # We need to know about the host architecture to avoid spurious
 # warnings.
 AC_CANONICAL_HOST
 AB_INIT
 
 # Checks for programs.
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CPP
 AC_PROG_AWK
 AC_CHECK_TOOL(AR, ar, :)
 AC_USE_SYSTEM_EXTENSIONS
 
 AM_LANGINFO_CODESET
 
 # Taken from mpfr-4.0.1, then modified for LDADD_FOR_TESTS_KLUDGE
 dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH
 dnl is defined. The issue is that with the new dtags, LD_LIBRARY_PATH has
 dnl the precedence over the run path, so that if a compatible MPFR library
 dnl is installed in some directory from $LD_LIBRARY_PATH, then the tested
 dnl MPFR library will be this library instead of the MPFR library from the
 dnl build tree. Other OS with the same issue might be added later.
 dnl
 dnl References:
 dnl   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859732
 dnl   http://lists.gnu.org/archive/html/libtool/2017-05/msg00000.html
 dnl
 dnl We need to check whether --disable-new-dtags is supported as alternate
 dnl linkers may be used (e.g., with tcc: CC=tcc LD=tcc).
 dnl
 case $host in
   *-*-linux*)
     if test -n "$LD_LIBRARY_PATH"; then
       saved_LDFLAGS="$LDFLAGS"
       LDADD_FOR_TESTS_KLUDGE="-Wl,--disable-new-dtags"
       LDFLAGS="$LDFLAGS $LDADD_FOR_TESTS_KLUDGE"
       AC_MSG_CHECKING(whether --disable-new-dtags is supported by the linker)
       AC_LINK_IFELSE([AC_LANG_SOURCE([[
 int main (void) { return 0; }
       ]])],
       [AC_MSG_RESULT(yes (use it since LD_LIBRARY_PATH is set))],
       [AC_MSG_RESULT(no)
        LDADD_FOR_TESTS_KLUDGE=""
       ])
       LDFLAGS="$saved_LDFLAGS"
     fi
     ;;
 esac
 AC_SUBST([LDADD_FOR_TESTS_KLUDGE])
 
 # Set some variables depending on the platform for later use.
 have_w32_system=no
 have_w64_system=no
 have_w32ce_system=no
 case "${host}" in
     x86_64-*mingw32*)
         have_w32_system=yes
         have_w64_system=yes
         ;;
     *-mingw32ce*)
         have_w32_system=yes
         have_w32ce_system=yes
         ;;
     *-mingw32*)
         have_w32_system=yes
         ;;
     *-apple-darwin*)
         # This is the equivalent of the _GNU_SOURCE feature-test-macro
         # on GNU libc systems.
         AC_DEFINE(_DARWIN_C_SOURCE, 1,
                   Expose all libc features (__DARWIN_C_FULL).)
         ;;
     *)
        ;;
 esac
 
 
 if test "$have_w32_system" != yes; then
   gl_THREADLIB_EARLY
 fi
 
 # We build libgpg-error with large file support so that we have a 64
 # bit off_t.  Our external interface uses the gpgrt_off_t which is
 # anyway specified as 64 bit.  Thus the same libgpg-error can be used
 # by software which is not build with large file support.
 AC_SYS_LARGEFILE
 
 
 LT_PREREQ([2.2.6])
 LT_INIT([win32-dll disable-static])
 LT_LANG([Windows Resource])
 
 
 # We need to compile and run a program on the build machine.
 AX_CC_FOR_BUILD
 
 AH_BOTTOM([
 /* Force using of NLS for W32 even if no libintl has been found.  This is
    okay because we have our own gettext implementation for W32.  */
 #if defined(HAVE_W32_SYSTEM) && !defined(ENABLE_NLS)
 #define ENABLE_NLS 1
 #endif
 
 /* Connect the generic estream-printf.c to our framework.  */
 #define _ESTREAM_PRINTF_REALLOC _gpgrt_realloc
 #define _ESTREAM_PRINTF_EXTRA_INCLUDE "gpgrt-int.h"
 
 /* For building we need to define these macro.  */
 #define GPG_ERR_ENABLE_GETTEXT_MACROS 1
 #define GPG_ERR_ENABLE_ERRNO_MACROS 1
 #define GPGRT_ENABLE_ES_MACROS 1
 #define GPGRT_ENABLE_LOG_MACROS 1
 #define GPGRT_ENABLE_ARGPARSE_MACROS 1
 ])
 
 
 # Note, that autogen.sh greps for the next line.
 AM_GNU_GETTEXT_VERSION([0.19.3])
 AM_GNU_GETTEXT([external])
 
 # Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS([locale.h stdint.h sys/select.h sys/time.h \
                   signal.h poll.h pwd.h])
 
 AC_FUNC_STRERROR_R
 case "${host_os}" in
      mingw32*)
      INSTALLSHELLPATH=/bin/sh
      AC_CHECK_FUNC([strerror_s])
      ;;
      solaris*)
      INSTALLSHELLPATH=/usr/xpg4/bin/sh
      # All versions of Solaris from 2.4 have a thread-safe strerror().
      # Since Solaris 10, in addition strerror_r() exists.
      ;;
      *)
      INSTALLSHELLPATH=/bin/sh
      AC_CHECK_FUNC([strerror_r], [],
 AC_MSG_WARN([[Without strerror_r, gpg_strerror_r might not be thread-safe]]))
      ;;
 esac
 AC_SUBST(INSTALLSHELLPATH)
 
 AC_FUNC_FORK
 AC_CHECK_FUNCS([flockfile vasprintf mmap rand strlwr stpcpy setenv stat \
                 getrlimit getpwnam getpwuid getpwnam_r getpwuid_r ])
 
 
 #
 # Checks for typedefs, structures, and compiler characteristics.
 #
 AC_C_CONST
 
 AC_CHECK_SIZEOF(int)
 AC_CHECK_SIZEOF(long)
 AC_CHECK_SIZEOF(long long)
 AC_HEADER_TIME
 AC_CHECK_SIZEOF(time_t,,[[
 #include <stdio.h>
 #if TIME_WITH_SYS_TIME
 # include <sys/time.h>
 # include <time.h>
 #else
 # if HAVE_SYS_TIME_H
 #  include <sys/time.h>
 # else
 #  include <time.h>
 # endif
 #endif
 ]])
 
 GNUPG_FUNC_MKDIR_TAKES_ONE_ARG
 
 
 # Find a 64 bit integer type to be used instead of off_t.  We prefer
 # the standard integer types over int64_t and finally try long long.
 if test "$ac_cv_sizeof_int" = "8"; then
    replacement_for_off_t="int"
 elif test "$ac_cv_sizeof_long" = "8"; then
    replacement_for_off_t="long"
 elif test "$ac_cv_header_stdint_h" = yes; then
    replacement_for_off_t="int64_t"
 elif test "$ac_cv_sizeof_long_long" = "8"; then
    replacement_for_off_t="long long"
 else
    AC_MSG_ERROR([[
 ***
 *** No 64 bit signed integer type found.  Can't build this library.
 ***]])
 fi
 AC_DEFINE_UNQUOTED(REPLACEMENT_FOR_OFF_T, "$replacement_for_off_t",
                    [Used by mkheader to insert the replacement type.])
 
 
 #
 # Setup gcc specific options
 #
 AC_MSG_NOTICE([checking for cc features])
 if test "$GCC" = yes; then
     # Check whether gcc does not emit a diagnostic for unknown -Wno-*
     # options.  This is the case for gcc >= 4.6
     AC_MSG_CHECKING([if gcc ignores unknown -Wno-* options])
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6 )
 #kickerror
 #endif]],[])],[_gcc_silent_wno=yes],[_gcc_silent_wno=no])
     AC_MSG_RESULT($_gcc_silent_wno)
 
     # Note that it is okay to use CFLAGS here because these are just
     # warning options and the user should have a chance of overriding
     # them.
     if test "$USE_MAINTAINER_MODE" = "yes"; then
         M_CFLAGS="-O3 -Wall -Wcast-align -Wshadow -Wstrict-prototypes"
         M_CFLAGS="$M_CFLAGS -Wformat -Wno-format-y2k -Wformat-security"
         if test x"$_gcc_silent_wno" = xyes ; then
           _gcc_wopt=yes
         else
           AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers])
           _gcc_cflags_save=$CFLAGS
           CFLAGS="-Wno-missing-field-initializers"
           AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
                             [_gcc_wopt=yes],[_gcc_wopt=no])
           AC_MSG_RESULT($_gcc_wopt)
           CFLAGS=$_gcc_cflags_save;
         fi
         if test x"$_gcc_wopt" = xyes ; then
           M_CFLAGS="$M_CFLAGS -W -Wno-sign-compare -Wno-missing-field-initializers"
         fi
 
         AC_MSG_CHECKING([if gcc supports -Wdeclaration-after-statement])
         _gcc_cflags_save=$CFLAGS
         CFLAGS="-Wdeclaration-after-statement"
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
         AC_MSG_RESULT($_gcc_wopt)
         CFLAGS=$_gcc_cflags_save;
         if test x"$_gcc_wopt" = xyes ; then
           M_CFLAGS="$M_CFLAGS -Wdeclaration-after-statement"
         fi
 
 	# Prepend the maintainer-cflags so that the user can override
 	# them, e.g. to override the optimization flags for debugging.
 	CFLAGS="$M_CFLAGS $CFLAGS"
     else
         CFLAGS="$CFLAGS -Wall"
     fi
 
     AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
     _gcc_cflags_save=$CFLAGS
     CFLAGS="-Wpointer-arith"
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_psign=yes,_gcc_psign=no)
     AC_MSG_RESULT($_gcc_psign)
     CFLAGS=$_gcc_cflags_save;
     if test x"$_gcc_psign" = xyes ; then
        CFLAGS="$CFLAGS -Wpointer-arith"
     fi
 
     # The undocumented option -Wno-psabi suppresses the annoying
     #   "the ABI of passing union with long double has changed in GCC 4.4"
     # which is emitted in estream-printf.c but entirely irrelvant
     # because that union is local to the file.
     if test x"$_gcc_silent_wno" = xyes ; then
        CFLAGS="$CFLAGS -Wno-psabi"
     fi
 fi
 
 #
 # Check whether the compiler supports the GCC style aligned attribute
 #
 AC_CACHE_CHECK([whether the GCC style aligned attribute is supported],
        [gcry_cv_gcc_attribute_aligned],
        [gcry_cv_gcc_attribute_aligned=no
         AC_COMPILE_IFELSE([AC_LANG_SOURCE(
           [[struct { int a; } foo __attribute__ ((aligned (16)));]])],
           [gcry_cv_gcc_attribute_aligned=yes])])
 if test "$gcry_cv_gcc_attribute_aligned" = "yes" ; then
    AC_DEFINE(HAVE_GCC_ATTRIBUTE_ALIGNED,1,
      [Defined if a GCC style "__attribute__ ((aligned (n))" is supported])
 fi
 
 #
 # Check for ELF visibility support.
 #
 AC_CACHE_CHECK(whether the visibility attribute is supported,
        gcry_cv_visibility_attribute,
        [gcry_cv_visibility_attribute=no
         AC_LANG_CONFTEST([AC_LANG_SOURCE(
           [[int foo __attribute__ ((visibility ("hidden"))) = 1;
             int bar __attribute__ ((visibility ("protected"))) = 1;
           ]])])
 
         if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                   1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
             if grep '\.hidden.*foo' conftest.s >/dev/null 2>&1 ; then
                 if grep '\.protected.*bar' conftest.s >/dev/null 2>&1; then
                     gcry_cv_visibility_attribute=yes
                 fi
             fi
         fi
        ])
 if test "$gcry_cv_visibility_attribute" = "yes"; then
     AC_CACHE_CHECK(for broken visibility attribute,
        gcry_cv_broken_visibility_attribute,
        [gcry_cv_broken_visibility_attribute=yes
         AC_LANG_CONFTEST([AC_LANG_SOURCE(
           [[int foo (int x);
             int bar (int x) __asm__ ("foo")
                             __attribute__ ((visibility ("hidden")));
             int bar (int x) { return x; }
           ]])])
 
         if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                   1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
            if grep '\.hidden@<:@ 	_@:>@foo' conftest.s >/dev/null 2>&1;
             then
                gcry_cv_broken_visibility_attribute=no
            fi
         fi
        ])
 fi
 if test "$gcry_cv_visibility_attribute" = "yes"; then
     AC_CACHE_CHECK(for broken alias attribute,
        gcry_cv_broken_alias_attribute,
        [gcry_cv_broken_alias_attribute=yes
         AC_LANG_CONFTEST([AC_LANG_SOURCE(
           [[extern int foo (int x) __asm ("xyzzy");
             int bar (int x) { return x; }
             extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
             extern int dfoo;
             extern __typeof (dfoo) dfoo __asm ("abccb");
             int dfoo = 1;
           ]])])
 
         if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                   1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
            if grep 'xyzzy' conftest.s >/dev/null 2>&1 && \
               grep 'abccb' conftest.s >/dev/null 2>&1; then
               gcry_cv_broken_alias_attribute=no
            fi
         fi
         ])
 fi
 if test "$gcry_cv_visibility_attribute" = "yes"; then
     AC_CACHE_CHECK(if gcc supports -fvisibility=hidden,
        gcry_cv_gcc_has_f_visibility,
        [gcry_cv_gcc_has_f_visibility=no
         _gcc_cflags_save=$CFLAGS
         CFLAGS="-fvisibility=hidden"
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
                           gcry_cv_gcc_has_f_visibility=yes)
         CFLAGS=$_gcc_cflags_save;
        ])
 fi
 if test "$gcry_cv_visibility_attribute" = "yes" \
    && test "$gcry_cv_broken_visibility_attribute" != "yes" \
    && test "$gcry_cv_broken_alias_attribute" != "yes" \
    && test "$gcry_cv_gcc_has_f_visibility" = "yes"
  then
    AC_DEFINE(GPGRT_USE_VISIBILITY, 1,
              [Define to use the GNU C visibility attribute.])
    CFLAGS="$CFLAGS -fvisibility=hidden"
 fi
 
 #
 # Check whether ld supports a version script.
 # (Actually not a check but a list of systems which are known to support it.)
 #
 have_ld_version_script=no
 case "${host}" in
     *-*-linux*)
 	have_ld_version_script=yes
         ;;
     *-*-gnu*)
 	have_ld_version_script=yes
         ;;
 esac
 AC_ARG_ENABLE([ld-version-script],
               AS_HELP_STRING([--enable-ld-version-script],
                              [enable/disable use of linker version script.
                               (default is system dependent)]),
               [have_ld_version_script=$enableval],
               [ : ] )
 AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
 
 
 #
 # Check for thread library.
 #
 # Windows has always thread support; thus we don't bother to test for
 # it as it may lead to false results when cross building.
 if test "$have_w32_system" = yes; then
   GPG_ERROR_CONFIG_LIBS_PRIVATE=-lws2_32
   AC_DEFINE([USE_WINDOWS_THREADS], [1])
   LIBTHREAD=
   LTLIBTHREAD=
   LIBMULTITHREAD=
   LTLIBMULTITHREAD=
   THREADLIB_CPPFLAGS=""
   AC_SUBST([LIBTHREAD])
   AC_SUBST([LTLIBTHREAD])
   AC_SUBST([LIBMULTITHREAD])
   AC_SUBST([LTLIBMULTITHREAD])
 else
   GPG_ERROR_CONFIG_LIBS_PRIVATE=""
   gl_LOCK
   if test "$gl_threads_api" = posix; then
     AC_CHECK_SIZEOF(pthread_mutex_t,,[AC_INCLUDES_DEFAULT
                                       #include <pthread.h>])
     AC_CHECK_HEADERS([sys/single_threaded.h])
   fi
 fi
 
 # Default value for GPG_ERROR_CONFIG_LIBS
 config_libs="-lgpg-error"
 
 #
 # Check for other libraries
 #
 LIB_SCHED_YIELD=
 AC_SUBST([LIB_SCHED_YIELD])
 AC_SEARCH_LIBS([sched_yield], [rt posix4],
                [if test "$ac_cv_search_sched_yield" != "none required"; then
                   LIB_SCHED_YIELD=$ac_cv_search_sched_yield
                   config_libs="$config_libs $LIB_SCHED_YIELD"
                 fi])
 
 LIB_NETWORK=
 AC_SUBST([LIB_NETWORK])
 AC_SEARCH_LIBS([inet_addr], [nsl],
                [if test "$ac_cv_search_inet_addr" != "none required"; then
                   LIB_NETWORK=$ac_cv_search_inet_addr
                 fi])
 AC_SEARCH_LIBS([socket], [socket],
                [if test "$ac_cv_search_socket" != "none required"; then
                   LIB_NETWORK="$ac_cv_search_socket $LIB_NETWORK"
                 fi], [], [$LIB_NETWORK])
 if test "x$LIB_NETWORK" != x; then
   config_libs="$config_libs $LIB_NETWORK"
 fi
 
 # Check for optional readline support
 GNUPG_CHECK_READLINE
 
 
 #
 # Prepare building of estream
 #
 estream_INIT
 
 #
 # Substitution used for gpg-error-config
 #
 GPG_ERROR_CONFIG_LIBS="$config_libs"
 if test "x$LIBTHREAD" != x; then
   GPG_ERROR_CONFIG_LIBS="${GPG_ERROR_CONFIG_LIBS} ${LIBTHREAD}"
 fi
 if test "x$LIBMULTITHREAD" != x; then
   GPG_ERROR_CONFIG_MT_LIBS="${LIBMULTITHREAD}"
 else
   GPG_ERROR_CONFIG_MT_LIBS=""
 fi
 if test "$have_w32ce_system" = yes; then
   GPG_ERROR_CONFIG_CFLAGS="-idirafter \${includedir}/gpg-extra"
 else
   GPG_ERROR_CONFIG_CFLAGS=""
 fi
 if test "x$THREADLIB_CPPFLAGS" != x; then
   GPG_ERROR_CONFIG_MT_CFLAGS="${THREADLIB_CPPFLAGS}"
 else
   GPG_ERROR_CONFIG_MT_CFLAGS=""
 fi
 GPG_ERROR_CONFIG_HOST="$host"
 
 case "$includedir" in
   /usr/include|/include) ;;
   '${prefix}/include')
     if test "$prefix" != / -a "$prefix" != /usr; then
       if test -z "$GPG_ERROR_CONFIG_CFLAGS"; then
         GPG_ERROR_CONFIG_CFLAGS="-I\${includedir}"
       else
         GPG_ERROR_CONFIG_CFLAGS="-I\${includedir} $GPG_ERROR_CONFIG_CFLAGS"
       fi
     fi
     ;;
   *)
     if test -z "$GPG_ERROR_CONFIG_CFLAGS"; then
       GPG_ERROR_CONFIG_CFLAGS="-I\${includedir}"
     else
       GPG_ERROR_CONFIG_CFLAGS="-I\${includedir} $GPG_ERROR_CONFIG_CFLAGS"
     fi
     ;;
 esac
 case "$libdir" in
   /usr/lib|/usr/lib64|/lib|/lib64) ;;
   '${exec_prefix}/lib')
     if test "$exec_prefix" = "NONE"; then
       if test "$prefix" != / -a "$prefix" != /usr; then
         GPG_ERROR_CONFIG_LIBS="-L\${libdir} $GPG_ERROR_CONFIG_LIBS"
       fi
     elif test "$exec_prefix" != / -a "$exec_prefix" != /usr; then
       GPG_ERROR_CONFIG_LIBS="-L\${libdir} $GPG_ERROR_CONFIG_LIBS"
     fi
     ;;
   *) GPG_ERROR_CONFIG_LIBS="-L\${libdir} $GPG_ERROR_CONFIG_LIBS" ;;
 esac
 
 AC_SUBST(GPG_ERROR_CONFIG_LIBS)
 AC_SUBST(GPG_ERROR_CONFIG_CFLAGS)
 AC_SUBST(GPG_ERROR_CONFIG_MT_LIBS)
 AC_SUBST(GPG_ERROR_CONFIG_MT_CFLAGS)
 AC_SUBST(GPG_ERROR_CONFIG_LIBS_PRIVATE)
 AC_SUBST(GPG_ERROR_CONFIG_HOST)
 
 
 #
 # Special defines for certain platforms
 #
 force_use_syscfg=no
 if test "$have_w32_system" = yes; then
     AC_DEFINE(HAVE_W32_SYSTEM,1,[Defined if we run on a W32 API based system])
     if test "$have_w64_system" = yes; then
       AC_DEFINE(HAVE_W64_SYSTEM,1,[Defined if we run on 64 bit W32 API system])
     fi
     if test "$have_w32ce_system" = yes; then
       AC_DEFINE(HAVE_W32CE_SYSTEM,1,[Defined if we run on WindowsCE])
     fi
     force_use_syscfg=yes
 fi
 if test x"$gl_use_threads" = xno; then
   lock_obj_h_generated=yes
   if test ! -d src; then mkdir src; fi
   host=$host $srcdir/src/gen-lock-obj.sh --disable-threads \
     >src/lock-obj-pub.native.h
   AC_MSG_NOTICE([generated src/lock-obj-pub.native.h for $host])
 elif test x$cross_compiling = xyes; then
   case $host in
     *-*-linux-gnu*)
     AC_CHECK_TOOL(OBJDUMP, [objdump])
     if test -n "$OBJDUMP"; then
       lock_obj_h_generated=yes
       if test ! -d src; then mkdir src; fi
       LOCK_ABI_VERSION=1 host=$host host_alias=$host_alias \
           CC=$CC OBJDUMP=$OBJDUMP \
           ac_ext=$ac_ext ac_objext=$ac_objext \
           AWK=$AWK $srcdir/src/gen-lock-obj.sh \
           >src/lock-obj-pub.native.h
       AC_MSG_NOTICE([generated src/lock-obj-pub.native.h using $host_alias-objdump and $AWK])
     else
       force_use_syscfg=yes
     fi
     ;;
     *)
     force_use_syscfg=yes
     ;;
   esac
 fi
 
 AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)
 AM_CONDITIONAL(HAVE_W64_SYSTEM, test "$have_w64_system" = yes)
 AM_CONDITIONAL(HAVE_W32CE_SYSTEM, test "$have_w32ce_system" = yes)
 AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)
 AM_CONDITIONAL(FORCE_USE_SYSCFG, test x$force_use_syscfg = xyes)
 AM_CONDITIONAL(HAVE_GENERATED_LOCK_OBJ_H, test x$lock_obj_h_generated = xyes)
 
+have_lock_optimization=no
+if test "$gl_threads_api" = posix; then
+  if test x$ac_cv_header_sys_single_threaded_h = xyes \
+       -o x$gl_cv_have_weak = xyes; then
+    have_lock_optimization=yes
+  fi
+fi
+AM_CONDITIONAL(HAVE_LOCK_OPTIMIZATION, test "$have_lock_optimization" = yes)
+
 AC_DEFINE_UNQUOTED(HOST_TRIPLET_STRING, "$host", [The host triplet])
 
 
 #
 # gpgrt_log_clock may require linking with extra libaries.  As long as
 # we don't have a good test for this we require the use of this
 # configure option to enabling printing of a timestamp.
 #
 AC_MSG_CHECKING([whether to enable log_clock])
 AC_ARG_ENABLE(log_clock,
               AS_HELP_STRING([--enable-log-clock],
                              [enable log_clock timestamps]),
               enable_log_clock=$enableval, enable_log_clock=no)
 AC_MSG_RESULT($enable_log_clock)
 if test "$enable_log_clock" = yes ; then
   AC_DEFINE(ENABLE_LOG_CLOCK,1,[Defined to use log_clock timestamps])
 fi
 
 #
 # For now we do not build gpgscm by default.
 # Eventually we will reverse the meaning of that option.
 #
 build_gpgscm=no
 #AC_MSG_CHECKING([whether to build gpgscm])
 #AC_ARG_ENABLE(gpgscm,
 #              AS_HELP_STRING([--enable-gpgscm],
 #                             [build the gpgscm tool]),
 #              build_gpgscm=$enableval, build_gpgscm=no)
 #AC_MSG_RESULT($build_gpgscm)
 AM_CONDITIONAL([BUILD_GPGSCM], [test "x$build_gpgscm" != xno])
 
 
 #
 # Add -Werror to CFLAGS.  This hack can be used to avoid problems with
 # misbehaving autoconf tests in case the user supplied -Werror.
 #
 AC_ARG_ENABLE(werror,
    AS_HELP_STRING([--enable-werror],
                   [append -Werror to CFLAGS]),
                   [if test $enableval = yes ; then
                       CFLAGS="$CFLAGS -Werror"
                    fi])
 
 
 #
 # Provide information about the build.
 #
 BUILD_REVISION="mym4_revision"
 AC_SUBST(BUILD_REVISION)
 AC_DEFINE_UNQUOTED(BUILD_REVISION, "$BUILD_REVISION",
                    [GIT commit id revision used to build this package])
 
 changequote(,)dnl
 BUILD_VERSION=`echo "$PACKAGE_VERSION"|sed 's/\([0-9.]*\).*/\1./'`
 changequote([,])dnl
 BUILD_VERSION="${BUILD_VERSION}0.mym4_revision_dec"
 BUILD_FILEVERSION=`echo "${BUILD_VERSION}" | tr . ,`
 AC_SUBST(BUILD_VERSION)
 AC_SUBST(BUILD_FILEVERSION)
 
 AC_ARG_ENABLE([build-timestamp],
   AS_HELP_STRING([--enable-build-timestamp],
                  [set an explicit build timestamp for reproducibility.
                   (default is the current time in ISO-8601 format)]),
      [if test "$enableval" = "yes"; then
         BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null || date`
       else
         BUILD_TIMESTAMP="$enableval"
       fi],
      [BUILD_TIMESTAMP="<none>"])
 AC_SUBST(BUILD_TIMESTAMP)
 AC_DEFINE_UNQUOTED(BUILD_TIMESTAMP, "$BUILD_TIMESTAMP",
                    [The time this package was configured for a build])
 
 
 
 AC_ARG_ENABLE(languages, AS_HELP_STRING([--disable-languages],
                         [do not build support for other languages than C]))
 AM_CONDITIONAL([LANGUAGES_SOME], [test "x$enable_languages" != xno])
 
 build_doc=yes
 AC_ARG_ENABLE([doc], AS_HELP_STRING([--disable-doc],
                                     [do not build the documentation]),
                      build_doc=$enableval, build_doc=yes)
 AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno])
 
 build_tests=yes
 AC_ARG_ENABLE([tests], AS_HELP_STRING([--disable-tests],
                                     [do not build the tests]),
                      build_tests=$enableval, build_tests=yes)
 AM_CONDITIONAL([BUILD_TESTS], [test "x$build_tests" != xno])
 
 #
 # Substitution
 #
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([doc/Makefile po/Makefile.in m4/Makefile])
 AC_CONFIG_FILES([src/Makefile tests/Makefile])
 AC_CONFIG_FILES([lang/Makefile lang/cl/Makefile lang/cl/gpg-error.asd])
 AC_CONFIG_FILES([src/versioninfo.rc src/gpg-error.w32-manifest])
 AC_CONFIG_FILES([src/gpg-error.pc])
 AC_CONFIG_FILES([src/gpg-error-config-old:src/gpg-error-config.in], [chmod +x src/gpg-error-config-old])
 AC_CONFIG_FILES([src/gpgrt-config], [chmod +x src/gpgrt-config])
 AC_CONFIG_FILES([src/gpg-error-config-test.sh], [chmod +x src/gpg-error-config-test.sh])
 
 AC_OUTPUT
 
 tmp=
 if test "$have_w32_system" != yes; then
    if test x"$gl_use_threads" = xno; then
      tmp=" NO-THREADS"
    fi
 fi
 echo "
         $PACKAGE_NAME v$PACKAGE_VERSION has been configured as follows:
 
         Revision: mym4_revision  (mym4_revision_dec)
         Platform: $host$tmp
 "
 if test "$gcry_cv_gcc_attribute_aligned" != "yes" ; then
 cat <<G10EOF
 ***
 ***  Please note that your compiler does not support the GCC style
 ***  aligned attribute.  Using this software may evoke bus errors.
 ***
 G10EOF
 fi
diff --git a/tests/Makefile.am b/tests/Makefile.am
index a8327d6..9652982 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,49 +1,48 @@
 # Makefile.am for libgpg-error/tests.
 # Copyright (C) 2003 g10 Code GmbH
 #
 # This file is part of libgpg-error.
 #
 # libgpg-error 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.
 #
 # libgpg-error 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 this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 
 ## Process this file with automake to produce Makefile.in
 
 if HAVE_W32CE_SYSTEM
 extra_includes = -idirafter $(top_builddir)/src/gpg-extra
 else
 extra_includes =
 endif
 
 EXTRA_DIST = t-argparse.conf etc/t-argparse.conf
 
 gpg_error_lib = ../src/libgpg-error.la
 
 TESTS = t-version t-strerror t-syserror t-lock t-printf t-poll t-b64 \
 	t-argparse t-logging t-stringutils t-malloc
 
-if HAVE_W32_SYSTEM
-else
+if HAVE_LOCK_OPTIMIZATION
 TESTS += t-lock-single-posix
 endif
 
 AM_CPPFLAGS = -I$(top_builddir)/src $(extra_includes)
 
 AM_LDFLAGS = -no-install
 LDADD = $(gpg_error_lib) @LDADD_FOR_TESTS_KLUDGE@
 
 noinst_PROGRAMS = $(TESTS)
 noinst_HEADERS = t-common.h
 
 t_lock_LDADD = $(LDADD) $(LIBMULTITHREAD)
 t_poll_LDADD = $(LDADD) $(LIBMULTITHREAD)