diff --git a/.gitignore b/.gitignore
index ed690f89c..01c32fa89 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,10 @@
 .sconsign.dblite
 Buildhelper.pyc
 optcache
-
+Makefile.in
+build/*
+autom4te.cache/*
+scripts/*
+configure
+aclocal.m4
+semantic.cache
diff --git a/configure.ac b/configure.ac
index 5b2512122..88ff7e908 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,7 @@ AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_CXX
 AC_PROG_LIBTOOL
+AC_PROG_RANLIB
 
 #
 # test for headers