Macos apparently lies an pretends to be Linux?

lib/portability.h

diff --git a/lib/portability.h b/lib/portability.h
index d7f163a..ea503fe 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -193,7 +193,7 @@
 #endif
 #endif
 
-#ifdef __linux__
+#if defined(__linux__) && !defined(__APPLE__)
 #include <sys/personality.h>
 #else
 #define LINUX_PER32 0