Three notes on OpenBSD.

README.md

@@ -108,5 +108,26 @@ to remove GCC-specific options. For example, on Solaris:
 The feature test macros on these systems isn't reliable, so you may also
 need to use `-D__EXTENSIONS__` in `CFLAGS`.
 
+### OpenBSD
+
+The man page needs to go into a different path for OpenBSD's `man` command:
+
+```
+diff --git a/Makefile b/Makefile
+index 119347a..dedf69d 100644
+--- a/Makefile
++++ b/Makefile
+@@ -14,8 +14,8 @@ endlessh: endlessh.c
+ install: endlessh
+        install -d $(DESTDIR)$(PREFIX)/bin
+        install -m 755 endlessh $(DESTDIR)$(PREFIX)/bin/
+-       install -d $(DESTDIR)$(PREFIX)/share/man/man1
+-       install -m 644 endlessh.1 $(DESTDIR)$(PREFIX)/share/man/man1/
++       install -d $(DESTDIR)$(PREFIX)/man/man1
++       install -m 644 endlessh.1 $(DESTDIR)$(PREFIX)/man/man1/
+
+ clean:
+        rm -rf endlessh
+```
 
 [np]: https://nullprogram.com/blog/2019/03/22/