diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..1e01e7f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "libs/f90getopt"]
+	path = libs/f90getopt
+	url = https://github.com/PKM74/f90getopt
diff --git a/libs/f90getopt b/libs/f90getopt
new file mode 160000
index 0000000..872848f
--- /dev/null
+++ b/libs/f90getopt
@@ -0,0 +1 @@
+Subproject commit 872848f265bef0c20d3618be966d7a4302d20973