Minor build system fixes.
diff --git a/.gitignore b/.gitignore
index 6209bf6..f08cb72 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,7 @@
 googletest/m4/ltsugar.m4
 googletest/m4/ltversion.m4
 googletest/m4/lt~obsolete.m4
+googlemock/m4
 
 # Ignore generated directories.
 googlemock/fused-src/