diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..cb6073696
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.o
+*.d
+filterlib
+yosys
diff --git a/frontends/ilang/.gitignore b/frontends/ilang/.gitignore
new file mode 100644
index 000000000..72b06b0bf
--- /dev/null
+++ b/frontends/ilang/.gitignore
@@ -0,0 +1,4 @@
+lexer.cc
+parser.output
+parser.tab.cc
+parser.tab.h
diff --git a/frontends/verilog/.gitignore b/frontends/verilog/.gitignore
new file mode 100644
index 000000000..72b06b0bf
--- /dev/null
+++ b/frontends/verilog/.gitignore
@@ -0,0 +1,4 @@
+lexer.cc
+parser.output
+parser.tab.cc
+parser.tab.h
diff --git a/passes/techmap/.gitignore b/passes/techmap/.gitignore
new file mode 100644
index 000000000..ca9d3942c
--- /dev/null
+++ b/passes/techmap/.gitignore
@@ -0,0 +1 @@
+stdcells.inc
diff --git a/techlibs/.gitignore b/techlibs/.gitignore
new file mode 100644
index 000000000..e81e4e4b8
--- /dev/null
+++ b/techlibs/.gitignore
@@ -0,0 +1 @@
+blackbox.v