--- /dev/null
+Fix AM_PATH_LIBGCRYPT not found
+
+This patch installs a copy of libgcrypt.m4 from the libgcrypt source tarball
+to systemd m4 directory.
+
+Libgcrypt uses a custom m4 macro and not pkg-config to check if the
+development files are available. Though libgcrypt support is optional in
+systemd, this macro should be available whenever autoreconf is used, otherwise
+the re-configuration will fail with:
+
+ configure.ac:616: warning: macro 'AM_PATH_LIBGCRYPT' not found in library
+
+As asking the user to install the development package of libgcrypt on the host
+machine or adding libgcrypt as a build dependency to systemd is not
+acceptable, the required file is added to the m4 directory.
+
+Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
+Index: systemd-213/m4/libgcrypt.m4
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ systemd-213/m4/libgcrypt.m4 2014-06-11 10:41:11.749305509 +0200
+@@ -0,0 +1,123 @@
++dnl Autoconf macros for libgcrypt
++dnl Copyright (C) 2002, 2004 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
++dnl modifications, as long as this notice is preserved.
++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 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 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 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_LIBGCRYPT],
++[ AC_ARG_WITH(libgcrypt-prefix,
++ AC_HELP_STRING([--with-libgcrypt-prefix=PFX],
++ [prefix where LIBGCRYPT is installed (optional)]),
++ libgcrypt_config_prefix="$withval", libgcrypt_config_prefix="")
++ if test x$libgcrypt_config_prefix != x ; then
++ if test x${LIBGCRYPT_CONFIG+set} != xset ; then
++ LIBGCRYPT_CONFIG=$libgcrypt_config_prefix/bin/libgcrypt-config
++ fi
++ fi
++
++ AC_PATH_TOOL(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/'`
++ min_libgcrypt_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
++ else
++ req_libgcrypt_api=0
++ min_libgcrypt_version="$tmp"
++ fi
++
++ AC_MSG_CHECKING(for LIBGCRYPT - version >= $min_libgcrypt_version)
++ ok=no
++ if test "$LIBGCRYPT_CONFIG" != "no" ; then
++ req_major=`echo $min_libgcrypt_version | \
++ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
++ req_minor=`echo $min_libgcrypt_version | \
++ 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`
++ major=`echo $libgcrypt_config_version | \
++ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
++ minor=`echo $libgcrypt_config_version | \
++ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
++ micro=`echo $libgcrypt_config_version | \
++ sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
++ if test "$major" -gt "$req_major"; then
++ ok=yes
++ else
++ if test "$major" -eq "$req_major"; then
++ if test "$minor" -gt "$req_minor"; then
++ ok=yes
++ else
++ if test "$minor" -eq "$req_minor"; then
++ if test "$micro" -ge "$req_micro"; then
++ ok=yes
++ fi
++ fi
++ fi
++ fi
++ fi
++ fi
++ if test $ok = yes; then
++ AC_MSG_RESULT([yes ($libgcrypt_config_version)])
++ else
++ AC_MSG_RESULT(no)
++ fi
++ if test $ok = yes; then
++ # If we have a recent libgcrypt, we should also check that the
++ # API is compatible
++ if test "$req_libgcrypt_api" -gt 0 ; then
++ tmp=`$LIBGCRYPT_CONFIG --api-version 2>/dev/null || echo 0`
++ if test "$tmp" -gt 0 ; then
++ AC_MSG_CHECKING([LIBGCRYPT API version])
++ if test "$req_libgcrypt_api" -eq "$tmp" ; then
++ AC_MSG_RESULT([okay])
++ else
++ ok=no
++ AC_MSG_RESULT([does not match. want=$req_libgcrypt_api got=$tmp])
++ fi
++ fi
++ fi
++ fi
++ if test $ok = yes; then
++ LIBGCRYPT_CFLAGS=`$LIBGCRYPT_CONFIG --cflags`
++ LIBGCRYPT_LIBS=`$LIBGCRYPT_CONFIG --libs`
++ ifelse([$2], , :, [$2])
++ if test x"$host" != x ; then
++ libgcrypt_config_host=`$LIBGCRYPT_CONFIG --host 2>/dev/null || echo none`
++ if test x"$libgcrypt_config_host" != xnone ; then
++ if test x"$libgcrypt_config_host" != x"$host" ; then
++ AC_MSG_WARN([[
++***
++*** The config script $LIBGCRYPT_CONFIG was
++*** 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
++*** to specify a matching config script.
++***]])
++ fi
++ fi
++ fi
++ else
++ LIBGCRYPT_CFLAGS=""
++ LIBGCRYPT_LIBS=""
++ ifelse([$3], , :, [$3])
++ fi
++ AC_SUBST(LIBGCRYPT_CFLAGS)
++ AC_SUBST(LIBGCRYPT_LIBS)
++])
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