diff --git a/Makefile.am b/Makefile.am
index 306ce24..1cd1c23 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -32,6 +32,7 @@ changelogs = \
EXTRA_DIST= \
$(changelogs) \
+ macros/gob2.m4 \
diff --git a/configure.in b/configure.in
index 93e089c..9e5ff3f 100644
--- a/configure.in
+++ b/configure.in
@@ -1,4 +1,6 @@
AC_INIT(Makefile.am)
+AC_CONFIG_MACRO_DIR([macros])
+AC_SUBST(ACLOCAL_AMFLAGS, "$ACLOCAL_FLAGS -I macros")
dnl ******************************
dnl Version
diff --git a/macros/gob2.m4 b/macros/gob2.m4
new file mode 100644
index 0000000..b3659fa
--- /dev/null
+++ b/macros/gob2.m4
@@ -0,0 +1,58 @@
+dnl
+dnl GOB_HOOK(script if found, fail)
+dnl if fail = "failure", abort if GOB not found
+dnl
+
+
+AC_DEFUN([GOB2_HOOK],[
+ AC_PATH_PROG(GOB2,gob2)
+ if test ! x$GOB2 = x; then
+ if test ! x$1 = x; then
+ AC_MSG_CHECKING(for gob-2 >= $1)
+ g_r_ve=`echo $1|sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+ g_r_ma=`echo $1|sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+ g_r_mi=`echo $1|sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+ g_ve=`$GOB2 --version 2>&1|sed 's/Gob version \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+ g_ma=`$GOB2 --version 2>&1|sed 's/Gob version \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+ g_mi=`$GOB2 --version 2>&1|sed 's/Gob version \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+
+ if test $g_ve -eq $g_r_ve; then
+ if test $g_ma -ge $g_r_ma; then
+ if test $g_mi -ge $g_r_mi; then
+ AC_MSG_RESULT(ok)
+ else
+ if test $g_ma -gt $g_r_ma; then
+ AC_MSG_RESULT(ok)
+ else
+ AC_MSG_ERROR("found $g_ve.$g_ma.$g_mi requires $g_r_ve.$g_r_ma.$g_r_mi")
+ fi
+ fi
+ else
+ AC_MSG_ERROR("found $g_ve.$g_ma.$g_mi requires $g_r_ve.$g_r_ma.$g_r_mi")
+ fi
+ else
+ if test $g_ve -gt $g_r_ve; then
+ AC_MSG_RESULT(ok)
+ else
+ AC_MSG_ERROR(major version $g_ve found but $g_r_ve required)
+ fi
+ fi
+
+ unset gob_version
+ unset g_ve
+ unset g_ma
+ unset g_mi
+ unset g_r_ve
+ unset g_r_ma
+ unset g_r_mi
+ fi
+ AC_SUBST(GOB2)
+ $2
+ else
+ $3
+ fi
+])
+
+AC_DEFUN([GOB2_CHECK],[
+ GOB2_HOOK($1,[],[AC_MSG_WARN([Cannot find GOB-2, check http://www.5z.com/jirka/gob.html])])
+])