1 files changed, 37 insertions, 13 deletions

diff --git a/m4/libgcrypt.m4 b/m4/libgcrypt.m4
index dd167f81..19d514fd 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, 2020 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: 2020-09-27
 
 
 dnl AM_PATH_LIBGCRYPT([MINIMUM-VERSION,
@@ -19,7 +19,7 @@ dnl MINIMUM-VERSION is a string with the version number optionally 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 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
@@ -30,14 +30,26 @@ dnl
 AC_DEFUN([AM_PATH_LIBGCRYPT],
 [ AC_REQUIRE([AC_CANONICAL_HOST])
   AC_ARG_WITH(libgcrypt-prefix,
-            AC_HELP_STRING([--with-libgcrypt-prefix=PFX],
+            AS_HELP_STRING([--with-libgcrypt-prefix=PFX],
                            [prefix where LIBGCRYPT is installed (optional)]),
      libgcrypt_config_prefix="$withval", libgcrypt_config_prefix="")
   if test x"${LIBGCRYPT_CONFIG}" = x ; then
      if test x"${libgcrypt_config_prefix}" != x ; then
         LIBGCRYPT_CONFIG="${libgcrypt_config_prefix}/bin/libgcrypt-config"
-     else
-       case "${SYSROOT}" in
+     fi
+  fi
+
+  use_gpgrt_config=""
+  if test x"${LIBGCRYPT_CONFIG}" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
+    if $GPGRT_CONFIG libgcrypt --exists; then
+      LIBGCRYPT_CONFIG="$GPGRT_CONFIG libgcrypt"
+      AC_MSG_NOTICE([Use gpgrt-config as libgcrypt-config])
+      use_gpgrt_config=yes
+    fi
+  fi
+  if test -z "$use_gpgrt_config"; then
+    if test x"${LIBGCRYPT_CONFIG}" = x ; then
+      case "${SYSROOT}" in
          /*)
            if test -x "${SYSROOT}/bin/libgcrypt-config" ; then
              LIBGCRYPT_CONFIG="${SYSROOT}/bin/libgcrypt-config"
@@ -48,11 +60,11 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
           *)
            AC_MSG_WARN([Ignoring \$SYSROOT as it is not an absolute path.])
            ;;
-       esac
-     fi
+      esac
+    fi
+    AC_PATH_PROG(LIBGCRYPT_CONFIG, libgcrypt-config, no)
   fi
 
-  AC_PATH_PROG(LIBGCRYPT_CONFIG, libgcrypt-config, no)
   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 +83,11 @@ 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 $libgcrypt_config_version | \
@@ -103,7 +119,11 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
      # If we have a recent libgcrypt, we should also check that the
      # API is compatible
      if test "$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 "$tmp" ; then
@@ -119,12 +139,16 @@ AC_DEFUN([AM_PATH_LIBGCRYPT],
     LIBGCRYPT_CFLAGS=`$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