OpenBSD changes needed: Changed makefile using sh, changed main.cpp includes

Makefile

@@ -1,7 +1,7 @@
 PREFIX ?= /usr/local
 MANDIR ?= $(PREFIX)/share/man/man1/
 BUILDTYPE ?= Release
-SHELL = /bin/bash
+SHELL = /bin/sh
 
 # inherit from env if set
 CC := $(CC)

README.md

@@ -63,6 +63,14 @@ $ make -j
 $ make install
 ```
 
+On OpenBSD 
+```sh
+$ git clone https://github.com/mapbox/tippecanoe.git
+$ cd tippecanoe
+$ gmake
+$ doas gmake install
+```
+
 See [Development](#development) below for how to upgrade your
 C++ compiler or install prerequisite packages if you get
 compiler errors.

main.cpp

@@ -39,7 +39,13 @@
 #include <sys/sysctl.h>
 #include <sys/param.h>
 #include <sys/mount.h>
-#else
+#endif
+#ifdef __OpenBSD__
+#include <sys/types.h>
+#include <sys/mount.h>
+#endif
+
+#if !defined(__APPLE__) && !defined(__OpenBSD__) 
 #include <sys/statfs.h>
 #endif
 
@@ -85,7 +91,7 @@ struct source {
 	std::string layer = "";
 	std::string file = "";
 	std::string description = "";
-	std::string format = "";
+  std::string format = "";
 };
 
 size_t CPUS;