Fix FreeBSD endian checks
FreeBSD, like OpenBSD, uses BIG_ENDIAN, LITTLE_ENDIAN, and BYTE_ORDER,
whereas Linux and compatibles use __-prefixed names. Define the names
the same as the OpenBSD block below it.
diff --git a/include/compiler.h b/include/compiler.h
index a43fb6a..957f4b5 100644
--- a/include/compiler.h
+++ b/include/compiler.h
@@ -50,6 +50,9 @@
#endif
#ifdef __FreeBSD__
# include <sys/endian.h> /* htole32 and friends */
+# define __BYTE_ORDER BYTE_ORDER
+# define __LITTLE_ENDIAN LITTLE_ENDIAN
+# define __BIG_ENDIAN BIG_ENDIAN
#elif defined(__OpenBSD__)
# include <endian.h>
# define __BYTE_ORDER BYTE_ORDER