If m4 doesn't support --version, try if gm4 does.

diff --git a/buildconf b/buildconf
index 10eed4c..997031b 100755 (executable)
--- a/buildconf
+++ b/buildconf
@@ -248,7 +248,7 @@ fi
 #--------------------------------------------------------------------------
 # m4 check
 #
-m4=`${M4:-m4} --version 2>/dev/null|head -n 1`;
+m4=`${M4:-m4} --version 2>/dev/null || ${M4:-gm4} --version 2>/dev/null | head -n 1`;
 m4_version=`echo $m4 | sed -e 's/^.* \([0-9]\)/\1/' -e 's/[a-z]* *$//'`
 
 if { echo $m4 | grep "GNU" >/dev/null 2>&1; } then