diff --git a/pgn-extract/.gitignore b/pgn-extract/.gitignore
new file mode 100644
index 0000000..23df502
--- /dev/null
+++ b/pgn-extract/.gitignore
@@ -0,0 +1,3 @@
+/.ccls-cache/
+/*.o
+/pgn-extract
diff --git a/pgn-extract/Makefile b/pgn-extract/Makefile
index 589617e..bcb404a 100644
--- a/pgn-extract/Makefile
+++ b/pgn-extract/Makefile
@@ -35,7 +35,7 @@ DEBUGINFO=-g
 # Mac OS X users might need to add -D__unix__ to CFLAGS
 # and use CC=cc or CC=gcc
 
-OPTIMISE=-O3
+OPTIMISE=-O3 -D__linux__
 
 CFLAGS+=-c -pedantic -Wall -Wshadow -Wformat -Wpointer-arith \
 	-Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings \
diff --git a/pgn-extract/test/.gitignore b/pgn-extract/test/.gitignore
new file mode 100644
index 0000000..a93a5b5
--- /dev/null
+++ b/pgn-extract/test/.gitignore
@@ -0,0 +1 @@
+/.runtests