autogen.sh: Don't presume /usr/bin/m4.

* autogen.sh: Don't presume /usr/bin/m4.

diff --git a/autogen.sh b/autogen.sh
index 78b6802..501925f 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -21,7 +21,7 @@ else
   libtool --version
 fi
 echo ""
-${M4:-/usr/bin/m4} --version
+${M4:-m4} --version
 echo ""
 
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