commit db060d76c37a52b4234ad98917bec945b84f108b
from: Omar Polo <op@omarpolo.com>
date: Mon Jan 02 12:42:19 2023 UTC

add instructions for building on linux

commit - 75fd46eb6637a8c2c5c43c690dfcf4dacf02d6bf
commit + db060d76c37a52b4234ad98917bec945b84f108b
blob - 1f494eefa42c19abfed763343fdacb56fd7d49ee
blob + 9c09e89a1e3958fcc4d7a307be7fc0b05c9dc408
--- README.md
+++ README.md
@@ -14,6 +14,12 @@ To build and install it, just execute
 	$ make
 	$ doas make install
 
+On linux, `libbsd-overlay` must be used:
+
+	$ make CFLAGS="$(pkg-config --cflags libbsd-overlay)" \
+		LDFLAGS="$(pkg-config --libs libbsd-overlay libcrypto)"
+	$ sudo make install
+
 For casual use, an `install-local` target that only copies the programs
 in ~/bin is provided.