diff --git a/Common/sim/.gitignore.templ b/Common/sim/.gitignore.templ
new file mode 100644
index 0000000..907336a
--- /dev/null
+++ b/Common/sim/.gitignore.templ
@@ -0,0 +1,4 @@
+.gitignore
+build/
+.gitignore
+build/
diff --git a/lib/SDRAM/ddr_sdr_v1_5/ghdl/.gitignore.templ b/lib/SDRAM/ddr_sdr_v1_5/ghdl/.gitignore.templ
new file mode 100644
index 0000000..907336a
--- /dev/null
+++ b/lib/SDRAM/ddr_sdr_v1_5/ghdl/.gitignore.templ
@@ -0,0 +1,4 @@
+.gitignore
+build/
+.gitignore
+build/