diff --git a/m4/.gitignore b/m4/.gitignore
index f81e6208..4bc6b527 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -1,2 +1,3 @@
 *.m4
-!acinclude.m4
\ No newline at end of file
+!acinclude.m4
+!gpgme.m4
diff --git a/m4/gpgme.m4 b/m4/gpgme.m4
new file mode 100644
index 00000000..fe17f21a
--- /dev/null
+++ b/m4/gpgme.m4
@@ -0,0 +1,238 @@
+# gpgme.m4 - autoconf macro to detect GPGME.
+# Copyright (C) 2002, 2003, 2004 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
+# modifications, as long as this notice is preserved.
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+
+AC_DEFUN([_AM_PATH_GPGME_CONFIG],
+[ AC_ARG_WITH(gpgme-prefix,
+            AC_HELP_STRING([--with-gpgme-prefix=PFX],
+                           [prefix where GPGME is installed (optional)]),
+     gpgme_config_prefix="$withval", gpgme_config_prefix="")
+  if test "x$gpgme_config_prefix" != x ; then
+      GPGME_CONFIG="$gpgme_config_prefix/bin/gpgme-config"
+  fi
+  AC_PATH_PROG(GPGME_CONFIG, gpgme-config, no)
+
+  if test "$GPGME_CONFIG" != "no" ; then
+    gpgme_version=`$GPGME_CONFIG --version`
+  fi
+  gpgme_version_major=`echo $gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
+  gpgme_version_minor=`echo $gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
+  gpgme_version_micro=`echo $gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
+])
+
+dnl AM_PATH_GPGME([MINIMUM-VERSION,
+dnl               [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
+dnl Test for libgpgme and define GPGME_CFLAGS and GPGME_LIBS.
+dnl
+AC_DEFUN([AM_PATH_GPGME],
+[ AC_REQUIRE([_AM_PATH_GPGME_CONFIG])dnl
+  tmp=ifelse([$1], ,1:0.4.2,$1)
+  if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
+     req_gpgme_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
+     min_gpgme_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
+  else
+     req_gpgme_api=0
+     min_gpgme_version="$tmp"
+  fi
+
+  AC_MSG_CHECKING(for GPGME - version >= $min_gpgme_version)
+  ok=no
+  if test "$GPGME_CONFIG" != "no" ; then
+    req_major=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+    req_minor=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+    req_micro=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
+    if test "$gpgme_version_major" -gt "$req_major"; then
+        ok=yes
+    else 
+        if test "$gpgme_version_major" -eq "$req_major"; then
+            if test "$gpgme_version_minor" -gt "$req_minor"; then
+               ok=yes
+            else
+               if test "$gpgme_version_minor" -eq "$req_minor"; then
+                   if test "$gpgme_version_micro" -ge "$req_micro"; then
+                     ok=yes
+                   fi
+               fi
+            fi
+        fi
+    fi
+  fi
+  if test $ok = yes; then
+     # If we have a recent GPGME, we should also check that the
+     # API is compatible.
+     if test "$req_gpgme_api" -gt 0 ; then
+        tmp=`$GPGME_CONFIG --api-version 2>/dev/null || echo 0`
+        if test "$tmp" -gt 0 ; then
+           if test "$req_gpgme_api" -ne "$tmp" ; then
+             ok=no
+           fi
+        fi
+     fi
+  fi
+  if test $ok = yes; then
+    GPGME_CFLAGS=`$GPGME_CONFIG --cflags`
+    GPGME_LIBS=`$GPGME_CONFIG --libs`
+    AC_MSG_RESULT(yes)
+    ifelse([$2], , :, [$2])
+  else
+    GPGME_CFLAGS=""
+    GPGME_LIBS=""
+    AC_MSG_RESULT(no)
+    ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(GPGME_CFLAGS)
+  AC_SUBST(GPGME_LIBS)
+])
+
+dnl AM_PATH_GPGME_PTHREAD([MINIMUM-VERSION,
+dnl                       [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
+dnl Test for libgpgme and define GPGME_PTHREAD_CFLAGS
+dnl  and GPGME_PTHREAD_LIBS.
+dnl
+AC_DEFUN([AM_PATH_GPGME_PTHREAD],
+[ AC_REQUIRE([_AM_PATH_GPGME_CONFIG])dnl
+  tmp=ifelse([$1], ,1:0.4.2,$1)
+  if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
+     req_gpgme_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
+     min_gpgme_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
+  else
+     req_gpgme_api=0
+     min_gpgme_version="$tmp"
+  fi
+
+  AC_MSG_CHECKING(for GPGME pthread - version >= $min_gpgme_version)
+  ok=no
+  if test "$GPGME_CONFIG" != "no" ; then
+    if `$GPGME_CONFIG --thread=pthread 2> /dev/null` ; then
+      req_major=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+      req_minor=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+      req_micro=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
+      if test "$gpgme_version_major" -gt "$req_major"; then
+        ok=yes
+      else 
+        if test "$gpgme_version_major" -eq "$req_major"; then
+          if test "$gpgme_version_minor" -gt "$req_minor"; then
+            ok=yes
+          else
+            if test "$gpgme_version_minor" -eq "$req_minor"; then
+              if test "$gpgme_version_micro" -ge "$req_micro"; then
+                ok=yes
+              fi
+            fi
+          fi
+        fi
+      fi
+    fi
+  fi
+  if test $ok = yes; then
+     # If we have a recent GPGME, we should also check that the
+     # API is compatible.
+     if test "$req_gpgme_api" -gt 0 ; then
+        tmp=`$GPGME_CONFIG --api-version 2>/dev/null || echo 0`
+        if test "$tmp" -gt 0 ; then
+           if test "$req_gpgme_api" -ne "$tmp" ; then
+             ok=no
+           fi
+        fi
+     fi
+  fi
+  if test $ok = yes; then
+    GPGME_PTHREAD_CFLAGS=`$GPGME_CONFIG --thread=pthread --cflags`
+    GPGME_PTHREAD_LIBS=`$GPGME_CONFIG --thread=pthread --libs`
+    AC_MSG_RESULT(yes)
+    ifelse([$2], , :, [$2])
+  else
+    GPGME_PTHREAD_CFLAGS=""
+    GPGME_PTHREAD_LIBS=""
+    AC_MSG_RESULT(no)
+    ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(GPGME_PTHREAD_CFLAGS)
+  AC_SUBST(GPGME_PTHREAD_LIBS)
+])
+
+
+dnl AM_PATH_GPGME_GLIB([MINIMUM-VERSION,
+dnl               [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
+dnl Test for libgpgme-glib and define GPGME_GLIB_CFLAGS and GPGME_GLIB_LIBS.
+dnl
+AC_DEFUN([AM_PATH_GPGME_GLIB],
+[ AC_REQUIRE([_AM_PATH_GPGME_CONFIG])dnl
+  tmp=ifelse([$1], ,1:0.4.2,$1)
+  if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
+     req_gpgme_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
+     min_gpgme_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
+  else
+     req_gpgme_api=0
+     min_gpgme_version="$tmp"
+  fi
+
+  AC_MSG_CHECKING(for GPGME - version >= $min_gpgme_version)
+  ok=no
+  if test "$GPGME_CONFIG" != "no" ; then
+    req_major=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+    req_minor=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+    req_micro=`echo $min_gpgme_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
+    if test "$gpgme_version_major" -gt "$req_major"; then
+        ok=yes
+    else 
+        if test "$gpgme_version_major" -eq "$req_major"; then
+            if test "$gpgme_version_minor" -gt "$req_minor"; then
+               ok=yes
+            else
+               if test "$gpgme_version_minor" -eq "$req_minor"; then
+                   if test "$gpgme_version_micro" -ge "$req_micro"; then
+                     ok=yes
+                   fi
+               fi
+            fi
+        fi
+    fi
+  fi
+  if test $ok = yes; then
+     # If we have a recent GPGME, we should also check that the
+     # API is compatible.
+     if test "$req_gpgme_api" -gt 0 ; then
+        tmp=`$GPGME_CONFIG --api-version 2>/dev/null || echo 0`
+        if test "$tmp" -gt 0 ; then
+           if test "$req_gpgme_api" -ne "$tmp" ; then
+             ok=no
+           fi
+        fi
+     fi
+  fi
+  if test $ok = yes; then
+    GPGME_GLIB_CFLAGS=`$GPGME_CONFIG --glib --cflags`
+    GPGME_GLIB_LIBS=`$GPGME_CONFIG --glib --libs`
+    AC_MSG_RESULT(yes)
+    ifelse([$2], , :, [$2])
+  else
+    GPGME_GLIB_CFLAGS=""
+    GPGME_GLIB_LIBS=""
+    AC_MSG_RESULT(no)
+    ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(GPGME_GLIB_CFLAGS)
+  AC_SUBST(GPGME_GLIB_LIBS)
+])
+