diff --git a/updatemakes.sh b/updatemakes.sh
index cbf174f..5fd4775 100755
--- a/updatemakes.sh
+++ b/updatemakes.sh
@@ -1,29 +1,26 @@
 #!/bin/bash
 
+makefiles=(makefile makefile.icc makefile.shared makefile.unix makefile.mingw)
+
+function update_makefile() {
+	perl filter.pl $1 tmplist
+	sed -e 's/ *$//' < tmp.delme > $1
+	rm -f tmp.delme
+}
+
 bash genlist.sh > tmplist
 
-perl filter.pl makefile tmplist
-sed -e 's/ *$//' < tmp.delme > makefile
-rm -f tmp.delme
-
-perl filter.pl makefile.icc tmplist
-sed -e 's/ *$//' < tmp.delme > makefile.icc
-rm -f tmp.delme
-
-perl filter.pl makefile.shared tmplist
-sed -e 's/ *$//' < tmp.delme > makefile.shared
-rm -f tmp.delme
-
-perl filter.pl makefile.unix tmplist
-sed -e 's/ *$//' < tmp.delme > makefile.unix
-rm -f tmp.delme
-
-perl filter.pl makefile.mingw tmplist
-sed -e 's/ *$//' < tmp.delme > makefile.mingw
-rm -f tmp.delme
+for i in "${makefiles[@]}"
+do
+  update_makefile "$i"
+done
 
 perl filter.pl makefile.msvc tmplist
 sed -e 's/\.o /.obj /g' -e 's/ *$//' < tmp.delme > makefile.msvc
 rm -f tmp.delme
 
 rm -f tmplist
+
+if [ $# -eq 1 ] && [ "$1" == "-c" ]; then
+  git add ${makefiles[@]} makefile.msvc && git commit -m 'Update makefiles'
+fi