build: Update *.m4 from libraries.

* m4/gpg-error.m4: Update from master.
* m4/ksba.m4: Ditto.
* m4/libassuan.m4: Ditto.
* m4/libgcrypt.m4: Ditto.
* m4/npth.m4: Ditto.
* m4/ntbtls.m4: Ditto.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

6 files changed, 267 insertions, 141 deletions

diff --git a/m4/gpg-error.m4 b/m4/gpg-error.m4
index 8ba24b71a..0964a268f 100644
--- a/m4/gpg-error.m4
+++ b/m4/gpg-error.m4
@@ -1,5 +1,5 @@
 # gpg-error.m4 - autoconf macro to detect libgpg-error.
-# Copyright (C) 2002, 2003, 2004, 2011, 2014 g10 Code GmbH
+# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018 g10 Code GmbH
 #
 # This file is free software; as a special exception the author gives
 # unlimited permission to copy and/or distribute it, with or without
@@ -9,7 +9,7 @@
 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Last-changed: 2014-10-02
+# Last-changed: 2018-10-29
 
 
 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
@@ -17,7 +17,7 @@ dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
 dnl
 dnl Test for libgpg-error and define GPG_ERROR_CFLAGS, GPG_ERROR_LIBS,
 dnl GPG_ERROR_MT_CFLAGS, and GPG_ERROR_MT_LIBS.  The _MT_ variants are
-dnl used for programs requiring real multi thread support.
+dnl used for programs requireing real multi thread support.
 dnl
 dnl If a prefix option is not used, the config script is first
 dnl searched in $SYSROOT/bin and then along $PATH.  If the used
@@ -61,16 +61,28 @@ AC_DEFUN([AM_PATH_GPG_ERROR],
   fi
 
   AC_PATH_PROG(GPG_ERROR_CONFIG, gpg-error-config, no)
-  min_gpg_error_version=ifelse([$1], ,0.0,$1)
-  AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version)
+  min_gpg_error_version=ifelse([$1], ,1.33,$1)
   ok=no
-  if test "$GPG_ERROR_CONFIG" != "no" \
-     && test -f "$GPG_ERROR_CONFIG" ; then
+
+  use_gpgrt_config=""
+  if test "$GPG_ERROR_CONFIG" = "no"; then
+    AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no)
+    if test "$GPGRT_CONFIG" != "no"; then
+      GPGRT_CONFIG="$GPGRT_CONFIG --prefix=$prefix --exec-prefix=$exec_prefix --libdir=$libdir"
+      if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then
+        GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error"
+        use_gpgrt_config=yes
+        gpg_error_config_version=`$GPG_ERROR_CONFIG --modversion`
+      fi
+    fi
+  else
+    gpg_error_config_version=`$GPG_ERROR_CONFIG --version`
+  fi
+  if test "$GPG_ERROR_CONFIG" != "no"; then
     req_major=`echo $min_gpg_error_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
     req_minor=`echo $min_gpg_error_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
-    gpg_error_config_version=`$GPG_ERROR_CONFIG $gpg_error_config_args --version`
     major=`echo $gpg_error_config_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
     minor=`echo $gpg_error_config_version | \
@@ -84,23 +96,45 @@ AC_DEFUN([AM_PATH_GPG_ERROR],
             fi
         fi
     fi
+    if test -z "$GPGRT_CONFIG"; then
+      if test "$major" -gt 1 -o "$major" -eq 1 -a "$minor" -ge 33; then
+        AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no)
+        if test "$GPGRT_CONFIG" != "no"; then
+          GPGRT_CONFIG="$GPGRT_CONFIG --prefix=$prefix --exec-prefix=$exec_prefix --libdir=$libdir"
+          GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error"
+          use_gpgrt_config=yes
+        fi
+      fi
+    fi
   fi
+  AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version)
   if test $ok = yes; then
-    GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG $gpg_error_config_args --cflags`
-    GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG $gpg_error_config_args --libs`
-    GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG $gpg_error_config_args --mt --cflags 2>/dev/null`
-    GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG $gpg_error_config_args --mt --libs 2>/dev/null`
+    GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG --cflags`
+    GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG --libs`
+    if test -z "$use_gpgrt_config"; then
+      GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --mt --cflags 2>/dev/null`
+      GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --mt --libs 2>/dev/null`
+    else
+      GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --variable=mtcflags 2>/dev/null`
+      GPG_ERROR_MT_CFLAGS="$GPG_ERROR_CFLAGS${GPG_ERROR_CFLAGS:+ }$GPG_ERROR_MT_CFLAGS"
+      GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --variable=mtlibs 2>/dev/null`
+      GPG_ERROR_MT_LIBS="$GPG_ERROR_LIBS${GPG_ERROR_LIBS:+ }$GPG_ERROR_MT_LIBS"
+    fi
     AC_MSG_RESULT([yes ($gpg_error_config_version)])
     ifelse([$2], , :, [$2])
-    gpg_error_config_host=`$GPG_ERROR_CONFIG $gpg_error_config_args --host 2>/dev/null || echo none`
+    if test -z "$use_gpgrt_config"; then
+      gpg_error_config_host=`$GPG_ERROR_CONFIG --host 2>/dev/null || echo none`
+    else
+      gpg_error_config_host=`$GPG_ERROR_CONFIG --variable=host 2>/dev/null || echo none`
+    fi
     if test x"$gpg_error_config_host" != xnone ; then
       if test x"$gpg_error_config_host" != x"$host" ; then
   AC_MSG_WARN([[
 ***
-*** The config script $GPG_ERROR_CONFIG was
+*** The config script "$GPG_ERROR_CONFIG" was
 *** built for $gpg_error_config_host and thus may not match the
 *** used host $host.
-*** You may want to use the configure option --with-gpg-error-prefix
+*** You may want to use the configure option --with-libgpg-error-prefix
 *** to specify a matching config script or use \$SYSROOT.
 ***]])
         gpg_config_script_warn="$gpg_config_script_warn libgpg-error"
diff --git a/m4/ksba.m4 b/m4/ksba.m4
index 8cb49a391..ee4b96256 100644
--- a/m4/ksba.m4
+++ b/m4/ksba.m4
@@ -1,5 +1,5 @@
 # ksba.m4 - autoconf macro to detect ksba
-#       Copyright (C) 2002 g10 Code GmbH
+#       Copyright (C) 2002, 2018 g10 Code GmbH
 #
 # This file is free software; as a special exception the author gives
 # unlimited permission to copy and/or distribute it, with or without
@@ -13,27 +13,46 @@
 dnl AM_PATH_KSBA([MINIMUM-VERSION,
 dnl              [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
 dnl Test for libksba and define KSBA_CFLAGS and KSBA_LIBS
-dnl MINIMUM-VERSION is a string with the version number optionally prefixed
+dnl MINIMUN-VERSION is a string with the version number optionalliy prefixed
 dnl with the API version to also check the API compatibility. Example:
-dnl a MINIMUM-VERSION of 1:1.0.7 won't pass the test unless the installed
+dnl a MINIMUN-VERSION of 1:1.0.7 won't pass the test unless the installed
 dnl version of libksba is at least 1.0.7 *and* the API number is 1.  Using
-dnl this feature prevents building against newer versions of libksba
+dnl this features allows to prevent build against newer versions of libksba
 dnl with a changed API.
 dnl
 AC_DEFUN([AM_PATH_KSBA],
-[AC_REQUIRE([AC_CANONICAL_HOST])
- AC_ARG_WITH(ksba-prefix,
-            AC_HELP_STRING([--with-ksba-prefix=PFX],
-                           [prefix where KSBA is installed (optional)]),
+[ AC_REQUIRE([AC_CANONICAL_HOST])
+  dnl --with-libksba-prefix=PFX is the preferred name for this option,
+  dnl since that is consistent with how our three siblings use the directory/
+  dnl package name in --with-$dir_name-prefix=PFX.
+  AC_ARG_WITH(libksba-prefix,
+              AC_HELP_STRING([--with-libksba-prefix=PFX],
+                             [prefix where KSBA is installed (optional)]),
      ksba_config_prefix="$withval", ksba_config_prefix="")
+
+  dnl Accept --with-ksba-prefix and make it work the same as
+  dnl --with-libksba-prefix above, for backwards compatibility,
+  dnl but do not document this old, inconsistently-named option.
+  AC_ARG_WITH(ksba-prefix,,
+     ksba_config_prefix="$withval", ksba_config_prefix="")
+
   if test x$ksba_config_prefix != x ; then
-     ksba_config_args="$ksba_config_args --prefix=$ksba_config_prefix"
-     if test x${KSBA_CONFIG+set} != xset ; then
-        KSBA_CONFIG=$ksba_config_prefix/bin/ksba-config
-     fi
+    if test x${KSBA_CONFIG+set} != xset ; then
+      KSBA_CONFIG=$ksba_config_prefix/bin/ksba-config
+    fi
+  fi
+
+  use_gpgrt_config=""
+  if test x"$KSBA_CONFIG" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG ksba --exists; then
+      KSBA_CONFIG="$GPGRT_CONFIG ksba"
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    AC_PATH_PROG(KSBA_CONFIG, ksba-config, no)
   fi
 
-  AC_PATH_PROG(KSBA_CONFIG, ksba-config, no)
   tmp=ifelse([$1], ,1:1.0.0,$1)
   if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
      req_ksba_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
@@ -52,7 +71,11 @@ AC_DEFUN([AM_PATH_KSBA],
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
     req_micro=`echo $min_ksba_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
-    ksba_config_version=`$KSBA_CONFIG $ksba_config_args --version`
+    if test -z "$use_gpgrt_config"; then
+      ksba_config_version=`$KSBA_CONFIG --version`
+    else
+      ksba_config_version=`$KSBA_CONFIG --modversion`
+    fi
     major=`echo $ksba_config_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
     minor=`echo $ksba_config_version | \
@@ -84,7 +107,11 @@ AC_DEFUN([AM_PATH_KSBA],
      # Even if we have a recent libksba, we should check that the
      # API is compatible.
      if test "$req_ksba_api" -gt 0 ; then
-        tmp=`$KSBA_CONFIG --api-version 2>/dev/null || echo 0`
+        if test -z "$use_gpgrt_config"; then
+          tmp=`$KSBA_CONFIG --api-version 2>/dev/null || echo 0`
+	else
+          tmp=`$KSBA_CONFIG --variable=api_version 2>/dev/null || echo 0`
+	fi
         if test "$tmp" -gt 0 ; then
            AC_MSG_CHECKING([KSBA API version])
            if test "$req_ksba_api" -eq "$tmp" ; then
@@ -97,15 +124,19 @@ AC_DEFUN([AM_PATH_KSBA],
      fi
   fi
   if test $ok = yes; then
-    KSBA_CFLAGS=`$KSBA_CONFIG $ksba_config_args --cflags`
-    KSBA_LIBS=`$KSBA_CONFIG $ksba_config_args --libs`
+    KSBA_CFLAGS=`$KSBA_CONFIG --cflags`
+    KSBA_LIBS=`$KSBA_CONFIG --libs`
     ifelse([$2], , :, [$2])
-    libksba_config_host=`$LIBKSBA_CONFIG $ksba_config_args --host 2>/dev/null || echo none`
+    if test -z "$use_gpgrt_config"; then
+      libksba_config_host=`$KSBA_CONFIG --host 2>/dev/null || echo none`
+    else
+      libksba_config_host=`$KSBA_CONFIG --variable=host 2>/dev/null || echo none`
+    fi
     if test x"$libksba_config_host" != xnone ; then
       if test x"$libksba_config_host" != x"$host" ; then
   AC_MSG_WARN([[
 ***
-*** The config script $LIBKSBA_CONFIG was
+*** The config script "$KSBA_CONFIG" was
 *** built for $libksba_config_host and thus may not match the
 *** used host $host.
 *** You may want to use the configure option --with-libksba-prefix
diff --git a/m4/libassuan.m4 b/m4/libassuan.m4
index 004eee392..52058ea85 100644
--- a/m4/libassuan.m4
+++ b/m4/libassuan.m4
@@ -1,5 +1,5 @@
 dnl Autoconf macros for libassuan
-dnl       Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+dnl Copyright (C) 2002, 2003, 2011 Free Software Foundation, Inc.
 dnl
 dnl This file is free software; as a special exception the author gives
 dnl unlimited permission to copy and/or distribute it, with or without
@@ -8,23 +8,34 @@ dnl
 dnl This file is distributed in the hope that it will be useful, but
 dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl
 dnl Common code used for libassuan detection [internal]
 dnl Returns ok set to yes or no.
 dnl
 AC_DEFUN([_AM_PATH_LIBASSUAN_COMMON],
-[ AC_ARG_WITH(libassuan-prefix,
+[ AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_ARG_WITH(libassuan-prefix,
               AC_HELP_STRING([--with-libassuan-prefix=PFX],
                              [prefix where LIBASSUAN is installed (optional)]),
      libassuan_config_prefix="$withval", libassuan_config_prefix="")
   if test x$libassuan_config_prefix != x ; then
-    libassuan_config_args="$libassuan_config_args --prefix=$libassuan_config_prefix"
     if test x${LIBASSUAN_CONFIG+set} != xset ; then
       LIBASSUAN_CONFIG=$libassuan_config_prefix/bin/libassuan-config
     fi
   fi
-  AC_PATH_PROG(LIBASSUAN_CONFIG, libassuan-config, no)
+
+  use_gpgrt_config=""
+  if test x"${LIBASSUAN_CONFIG}" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG libassuan --exists; then
+      LIBASSUAN_CONFIG="$GPGRT_CONFIG libassuan"
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    AC_PATH_PROG(LIBASSUAN_CONFIG, libassuan-config, no)
+  fi
 
   tmp=ifelse([$1], ,1:0.9.2,$1)
   if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
@@ -35,55 +46,60 @@ AC_DEFUN([_AM_PATH_LIBASSUAN_COMMON],
     min_libassuan_version="$tmp"
   fi
 
-  if test "$LIBASSUAN_CONFIG" != "no" ; then
-    libassuan_version=`$LIBASSUAN_CONFIG --version`
-  fi
-  libassuan_version_major=`echo $libassuan_version | \
-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
-  libassuan_version_minor=`echo $libassuan_version | \
-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
-  libassuan_version_micro=`echo $libassuan_version | \
-               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
-
-  AC_MSG_CHECKING(for LIBASSUAN ifelse([$2], ,,[$2 ])- version >= $min_libassuan_version)
+  AC_MSG_CHECKING(for LIBASSUAN - version >= $min_libassuan_version)
   ok=no
-  if test "$LIBASSUAN_CONFIG" != "no" ; then
-    ifelse([$2], ,,[if `$LIBASSUAN_CONFIG --thread=$2 2> /dev/null` ; then])
+  if test "$LIBASSUAN_CONFIG" != "no"; then
     req_major=`echo $min_libassuan_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
     req_minor=`echo $min_libassuan_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
     req_micro=`echo $min_libassuan_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
-    if test "$libassuan_version_major" -gt "$req_major"; then
+
+    if test -z "$use_gpgrt_config"; then
+      libassuan_config_version=`$LIBASSUAN_CONFIG --version`
+    else
+      libassuan_config_version=`$LIBASSUAN_CONFIG --modversion`
+    fi
+    major=`echo $libassuan_config_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
+    minor=`echo $libassuan_config_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
+    micro=`echo $libassuan_config_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
+
+    if test "$major" -gt "$req_major"; then
         ok=yes
-    else 
-        if test "$libassuan_version_major" -eq "$req_major"; then
-            if test "$libassuan_version_minor" -gt "$req_minor"; then
+    else
+        if test "$major" -eq "$req_major"; then
+            if test "$minor" -gt "$req_minor"; then
                ok=yes
             else
-               if test "$libassuan_version_minor" -eq "$req_minor"; then
-                   if test "$libassuan_version_micro" -ge "$req_micro"; then
+               if test "$minor" -eq "$req_minor"; then
+                   if test "$micro" -ge "$req_micro"; then
                      ok=yes
                    fi
                fi
             fi
         fi
     fi
-    ifelse([$2], ,,[fi])
   fi
 
   if test $ok = yes; then
-    AC_MSG_RESULT([yes ($libassuan_version)])
+    AC_MSG_RESULT([yes ($libassuan_config_version)])
   else
     AC_MSG_RESULT(no)
   fi
 
   if test $ok = yes; then
     if test "$req_libassuan_api" -gt 0 ; then
-      tmp=`$LIBASSUAN_CONFIG --api-version 2>/dev/null || echo 0`
+      if test -z "$use_gpgrt_config"; then
+        tmp=`$LIBASSUAN_CONFIG --api-version 2>/dev/null || echo 0`
+      else
+        tmp=`$LIBASSUAN_CONFIG --variable=api_version 2>/dev/null || echo 0`
+      fi
       if test "$tmp" -gt 0 ; then
-        AC_MSG_CHECKING([LIBASSUAN ifelse([$2], ,,[$2 ])API version])
+        AC_MSG_CHECKING([LIBASSUAN API version])
         if test "$req_libassuan_api" -eq "$tmp" ; then
           AC_MSG_RESULT(okay)
         else
@@ -94,6 +110,27 @@ AC_DEFUN([_AM_PATH_LIBASSUAN_COMMON],
     fi
   fi
 
+  if test $ok = yes; then
+    if test x"$host" != x ; then
+      if test -z "$use_gpgrt_config"; then
+        libassuan_config_host=`$LIBASSUAN_CONFIG --host 2>/dev/null || echo none`
+      else
+        libassuan_config_host=`$LIBASSUAN_CONFIG --variable=host 2>/dev/null || echo none`
+      fi
+      if test x"$libassuan_config_host" != xnone ; then
+        if test x"$libassuan_config_host" != x"$host" ; then
+  AC_MSG_WARN([[
+***
+*** The config script "$LIBASSUAN_CONFIG" was
+*** built for $libassuan_config_host and thus may not match the
+*** used host $host.
+*** You may want to use the configure option --with-libassuan-prefix
+*** to specify a matching config script.
+***]])
+        fi
+      fi
+    fi
+  fi
 ])
 
 dnl AM_CHECK_LIBASSUAN([MINIMUM-VERSION,
@@ -120,8 +157,8 @@ dnl
 AC_DEFUN([AM_PATH_LIBASSUAN],
 [ _AM_PATH_LIBASSUAN_COMMON($1)
   if test $ok = yes; then
-    LIBASSUAN_CFLAGS=`$LIBASSUAN_CONFIG $libassuan_config_args --cflags`
-    LIBASSUAN_LIBS=`$LIBASSUAN_CONFIG $libassuan_config_args --libs`
+    LIBASSUAN_CFLAGS=`$LIBASSUAN_CONFIG --cflags`
+    LIBASSUAN_LIBS=`$LIBASSUAN_CONFIG --libs`
     ifelse([$2], , :, [$2])
   else
     LIBASSUAN_CFLAGS=""
@@ -131,45 +168,3 @@ AC_DEFUN([AM_PATH_LIBASSUAN],
   AC_SUBST(LIBASSUAN_CFLAGS)
   AC_SUBST(LIBASSUAN_LIBS)
 ])
-
-
-dnl AM_PATH_LIBASSUAN_PTH([MINIMUM-VERSION,
-dnl                      [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
-dnl Test for libassuan and define LIBASSUAN_PTH_CFLAGS and LIBASSUAN_PTH_LIBS
-dnl
-AC_DEFUN([AM_PATH_LIBASSUAN_PTH],
-[ _AM_PATH_LIBASSUAN_COMMON($1,pth)
-  if test $ok = yes; then
-    LIBASSUAN_PTH_CFLAGS=`$LIBASSUAN_CONFIG $libassuan_config_args --thread=pth --cflags`
-    LIBASSUAN_PTH_LIBS=`$LIBASSUAN_CONFIG $libassuan_config_args --thread=pth --libs`
-    ifelse([$2], , :, [$2])
-  else
-    LIBASSUAN_PTH_CFLAGS=""
-    LIBASSUAN_PTH_LIBS=""
-    ifelse([$3], , :, [$3])
-  fi
-  AC_SUBST(LIBASSUAN_PTH_CFLAGS)
-  AC_SUBST(LIBASSUAN_PTH_LIBS)
-])
-
-
-dnl AM_PATH_LIBASSUAN_PTHREAD([MINIMUM-VERSION,
-dnl                           [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
-dnl Test for libassuan and define LIBASSUAN_PTHREAD_CFLAGS 
-dnl                           and LIBASSUAN_PTHREAD_LIBS
-dnl
-AC_DEFUN([AM_PATH_LIBASSUAN_PTHREAD],
-[ _AM_PATH_LIBASSUAN_COMMON($1,pthread)
-  if test $ok = yes; then
-    LIBASSUAN_PTHREAD_CFLAGS=`$LIBASSUAN_CONFIG $libassuan_config_args --thread=pthread --cflags`
-    LIBASSUAN_PTHREAD_LIBS=`$LIBASSUAN_CONFIG $libassuan_config_args --thread=pthread --libs`
-    ifelse([$2], , :, [$2])
-  else
-    LIBASSUAN_PTHREAD_CFLAGS=""
-    LIBASSUAN_PTHREAD_LIBS=""
-    ifelse([$3], , :, [$3])
-  fi
-  AC_SUBST(LIBASSUAN_PTHREAD_CFLAGS)
-  AC_SUBST(LIBASSUAN_PTHREAD_LIBS)
-])
-
diff --git a/m4/libgcrypt.m4 b/m4/libgcrypt.m4
index dd167f814..2646e96c5 100644
--- a/m4/libgcrypt.m4
+++ b/m4/libgcrypt.m4
@@ -1,5 +1,5 @@
 # libgcrypt.m4 - Autoconf macros to detect libgcrypt
-# Copyright (C) 2002, 2003, 2004, 2011, 2014 g10 Code GmbH
+# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018 g10 Code GmbH
 #
 # This file is free software; as a special exception the author gives
 # unlimited permission to copy and/or distribute it, with or without
@@ -9,17 +9,17 @@
 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Last-changed: 2014-10-02
+# Last-changed: 2018-10-29
 
 
 dnl AM_PATH_LIBGCRYPT([MINIMUM-VERSION,
 dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
 dnl Test for libgcrypt and define LIBGCRYPT_CFLAGS and LIBGCRYPT_LIBS.
-dnl MINIMUM-VERSION is a string with the version number optionally prefixed
+dnl MINIMUN-VERSION is a string with the version number optionalliy prefixed
 dnl with the API version to also check the API compatibility. Example:
-dnl a MINIMUM-VERSION of 1:1.2.5 won't pass the test unless the installed
+dnl a MINIMUN-VERSION of 1:1.2.5 won't pass the test unless the installed
 dnl version of libgcrypt is at least 1.2.5 *and* the API number is 1.  Using
-dnl this feature prevents building against newer versions of libgcrypt
+dnl this features allows to prevent build against newer versions of libgcrypt
 dnl with a changed API.
 dnl
 dnl If a prefix option is not used, the config script is first
@@ -52,7 +52,17 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
      fi
   fi
 
-  AC_PATH_PROG(LIBGCRYPT_CONFIG, libgcrypt-config, no)
+  use_gpgrt_config=""
+  if test x"${LIBGCRYPT_CONFIG}" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG libgcrypt --exists; then
+      LIBGCRYPT_CONFIG="$GPGRT_CONFIG libgcrypt"
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    AC_PATH_PROG(LIBGCRYPT_CONFIG, libgcrypt-config, no)
+  fi
+
   tmp=ifelse([$1], ,1:1.2.0,$1)
   if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
      req_libgcrypt_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
@@ -71,7 +81,11 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
     req_micro=`echo $min_libgcrypt_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
-    libgcrypt_config_version=`$LIBGCRYPT_CONFIG --version`
+    if test -z "$use_gpgrt_config"; then
+      libgcrypt_config_version=`$LIBGCRYPT_CONFIG --version`
+    else
+      libgcrypt_config_version=`$LIBGCRYPT_CONFIG --modversion`
+    fi
     major=`echo $libgcrypt_config_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
     minor=`echo $libgcrypt_config_version | \
@@ -103,7 +117,11 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
      # If we have a recent libgcrypt, we should also check that the
      # API is compatible
      if test "$req_libgcrypt_api" -gt 0 ; then
-        tmp=`$LIBGCRYPT_CONFIG --api-version 2>/dev/null || echo 0`
+        if test -z "$use_gpgrt_config"; then
+           tmp=`$LIBGCRYPT_CONFIG --api-version 2>/dev/null || echo 0`
+	else
+           tmp=`$LIBGCRYPT_CONFIG --variable=api_version 2>/dev/null || echo 0`
+	fi
         if test "$tmp" -gt 0 ; then
            AC_MSG_CHECKING([LIBGCRYPT API version])
            if test "$req_libgcrypt_api" -eq "$tmp" ; then
@@ -119,12 +137,16 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
     LIBGCRYPT_CFLAGS=`$LIBGCRYPT_CONFIG --cflags`
     LIBGCRYPT_LIBS=`$LIBGCRYPT_CONFIG --libs`
     ifelse([$2], , :, [$2])
-    libgcrypt_config_host=`$LIBGCRYPT_CONFIG --host 2>/dev/null || echo none`
+    if test -z "$use_gpgrt_config"; then
+      libgcrypt_config_host=`$LIBGCRYPT_CONFIG --host 2>/dev/null || echo none`
+    else
+      libgcrypt_config_host=`$LIBGCRYPT_CONFIG --variable=host 2>/dev/null || echo none`
+    fi
     if test x"$libgcrypt_config_host" != xnone ; then
       if test x"$libgcrypt_config_host" != x"$host" ; then
   AC_MSG_WARN([[
 ***
-*** The config script $LIBGCRYPT_CONFIG was
+*** The config script "$LIBGCRYPT_CONFIG" was
 *** built for $libgcrypt_config_host and thus may not match the
 *** used host $host.
 *** You may want to use the configure option --with-libgcrypt-prefix
diff --git a/m4/npth.m4 b/m4/npth.m4
index 17c264491..7296cbc12 100644
--- a/m4/npth.m4
+++ b/m4/npth.m4
@@ -1,5 +1,5 @@
 # npth.m4 - autoconf macro to detect NPTH.
-# Copyright (C) 2002, 2003, 2004, 2011 g10 Code GmbH
+# Copyright (C) 2002, 2003, 2004, 2011, 2018 g10 Code GmbH
 #
 # This file is free software; as a special exception the author gives
 # unlimited permission to copy and/or distribute it, with or without
@@ -17,10 +17,24 @@ AC_DEFUN([_AM_PATH_NPTH_CONFIG],
   if test "x$npth_config_prefix" != x ; then
       NPTH_CONFIG="$npth_config_prefix/bin/npth-config"
   fi
-  AC_PATH_PROG(NPTH_CONFIG, npth-config, no)
+
+  use_gpgrt_config=""
+  if test x"$NPTH_CONFIG" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG npth --exists; then
+      NPTH_CONFIG="$GPGRT_CONFIG npth"
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    AC_PATH_PROG(NPTH_CONFIG, npth-config, no)
+  fi
 
   if test "$NPTH_CONFIG" != "no" ; then
-    npth_version=`$NPTH_CONFIG --version`
+    if test -z "$use_gpgrt_config"; then
+      npth_version=`$NPTH_CONFIG --version`
+    else
+      npth_version=`$NPTH_CONFIG --modversion`
+    fi
   fi
   npth_version_major=`echo $npth_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
@@ -70,31 +84,39 @@ AC_DEFUN([AM_PATH_NPTH],
     AC_MSG_RESULT(no)
   fi
   if test $ok = yes; then
-     # If we have a recent NPTH, we should also check that the
-     # API is compatible.
-     if test "$req_npth_api" -gt 0 ; then
+    # If we have a recent NPTH, we should also check that the
+    # API is compatible.
+    if test "$req_npth_api" -gt 0 ; then
+      if test -z "$use_gpgrt_config"; then
         tmp=`$NPTH_CONFIG --api-version 2>/dev/null || echo 0`
-        if test "$tmp" -gt 0 ; then
-           AC_MSG_CHECKING([NPTH API version])
-           if test "$req_npth_api" -eq "$tmp" ; then
-             AC_MSG_RESULT([okay])
-           else
-             ok=no
-             AC_MSG_RESULT([does not match. want=$req_npth_api got=$tmp])
-           fi
+      else
+        tmp=`$NPTH_CONFIG --variable=api_version 2>/dev/null || echo 0`
+      fi
+      if test "$tmp" -gt 0 ; then
+        AC_MSG_CHECKING([NPTH API version])
+        if test "$req_npth_api" -eq "$tmp" ; then
+          AC_MSG_RESULT([okay])
+        else
+          ok=no
+          AC_MSG_RESULT([does not match. want=$req_npth_api got=$tmp])
         fi
-     fi
+      fi
+    fi
   fi
   if test $ok = yes; then
     NPTH_CFLAGS=`$NPTH_CONFIG --cflags`
     NPTH_LIBS=`$NPTH_CONFIG --libs`
     ifelse([$2], , :, [$2])
-    npth_config_host=`$NPTH_CONFIG --host 2>/dev/null || echo none`
+    if test -z "$use_gpgrt_config"; then
+      npth_config_host=`$NPTH_CONFIG --host 2>/dev/null || echo none`
+    else
+      npth_config_host=`$NPTH_CONFIG --variable=host 2>/dev/null || echo none`
+    fi
     if test x"$npth_config_host" != xnone ; then
       if test x"$npth_config_host" != x"$host" ; then
         AC_MSG_WARN([[
 ***
-*** The config script $NPTH_CONFIG was
+*** The config script "$NPTH_CONFIG" was
 *** built for $npth_config_host and thus may not match the
 *** used host $host.
 *** You may want to use the configure option --with-npth-prefix
diff --git a/m4/ntbtls.m4 b/m4/ntbtls.m4
index 4a4b5da30..c4e07dc56 100644
--- a/m4/ntbtls.m4
+++ b/m4/ntbtls.m4
@@ -14,11 +14,11 @@ dnl AM_PATH_NTBTLS([MINIMUM-VERSION,
 dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
 dnl
 dnl Test for NTBTLS and define NTBTLS_CFLAGS and NTBTLS_LIBS.
-dnl MINIMUM-VERSION is a string with the version number optionally prefixed
+dnl MINIMUN-VERSION is a string with the version number optionalliy prefixed
 dnl with the API version to also check the API compatibility. Example:
-dnl a MINIMUM-VERSION of 1:1.2.5 won't pass the test unless the installed
-dnl version of ntbtls is at least 1.2.5 *and* the API number is 1.  Using
-dnl this feature prevents building against newer versions of ntbtls
+dnl a MINIMUN-VERSION of 1:1.2.5 won't pass the test unless the installed
+dnl version of libgcrypt is at least 1.2.5 *and* the API number is 1.  Using
+dnl this features allows to prevent build against newer versions of libgcrypt
 dnl with a changed API.
 dnl
 AC_DEFUN([AM_PATH_NTBTLS],
@@ -46,7 +46,17 @@ AC_DEFUN([AM_PATH_NTBTLS],
      fi
   fi
 
-  AC_PATH_PROG(NTBTLS_CONFIG, ntbtls-config, no)
+  use_gpgrt_config=""
+  if test x"${NTBTLS_CONFIG}" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG ntbtls --exists; then
+      NTBTLS_CONFIG="$GPGRT_CONFIG ntbtls"
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    AC_PATH_PROG(NTBTLS_CONFIG, ntbtls-config, no)
+  fi
+
   tmp=ifelse([$1], ,1:1.0.0,$1)
   if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
      req_ntbtls_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
@@ -65,7 +75,11 @@ AC_DEFUN([AM_PATH_NTBTLS],
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
     req_micro=`echo $min_ntbtls_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
-    ntbtls_config_version=`$NTBTLS_CONFIG --version`
+    if test -z "$use_gpgrt_config"; then
+      ntbtls_config_version=`$NTBTLS_CONFIG --version`
+    else
+      ntbtls_config_version=`$NTBTLS_CONFIG --modversion`
+    fi
     major=`echo $ntbtls_config_version | \
                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
     minor=`echo $ntbtls_config_version | \
@@ -97,7 +111,11 @@ AC_DEFUN([AM_PATH_NTBTLS],
      # If we have a recent ntbtls, we should also check that the
      # API is compatible
      if test "$req_ntbtls_api" -gt 0 ; then
-        tmp=`$NTBTLS_CONFIG --api-version 2>/dev/null || echo 0`
+        if test -z "$use_gpgrt_config"; then
+          tmp=`$NTBTLS_CONFIG --api-version 2>/dev/null || echo 0`
+        else
+          tmp=`$NTBTLS_CONFIG --variable=api_version 2>/dev/null || echo 0`
+	fi
         if test "$tmp" -gt 0 ; then
            AC_MSG_CHECKING([NTBTLS API version])
            if test "$req_ntbtls_api" -eq "$tmp" ; then
@@ -113,12 +131,16 @@ AC_DEFUN([AM_PATH_NTBTLS],
     NTBTLS_CFLAGS=`$NTBTLS_CONFIG --cflags`
     NTBTLS_LIBS=`$NTBTLS_CONFIG --libs`
     ifelse([$2], , :, [$2])
-    ntbtls_config_host=`$NTBTLS_CONFIG --host 2>/dev/null || echo none`
+    if test -z "$use_gpgrt_config"; then
+      ntbtls_config_host=`$NTBTLS_CONFIG --host 2>/dev/null || echo none`
+    else
+      ntbtls_config_host=`$NTBTLS_CONFIG --variable=host 2>/dev/null || echo none`
+    fi
     if test x"$ntbtls_config_host" != xnone ; then
       if test x"$ntbtls_config_host" != x"$host" ; then
   AC_MSG_WARN([[
 ***
-*** The config script $NTBTLS_CONFIG was
+*** The config script "$NTBTLS_CONFIG" was
 *** built for $ntbtls_config_host and thus may not match the
 *** used host $host.
 *** You may want to use the configure option --with-ntbtls-prefix