--- arj-3.10.22/environ.c
+++ arj-3.10.22/environ.c
@@ -58,7 +58,7 @@
   #include <sys/ioctl.h>
   #include <sys/statfs.h>
   #include <sys/statvfs.h>
- #elif defined(__FreeBSD__)||defined(__NetBSD__)
+ #elif defined(__FreeBSD__)||defined(__NetBSD__)||defined(__APPLE__)
   #include <sys/param.h>
   #include <sys/mount.h>
  #elif defined(__QNXNTO__)
--- arj-3.10.22/gnu/configure.in
+++ arj-3.10.22/gnu/configure.in
@@ -62,6 +62,11 @@
         DLL_FLAGS="-shared -export-dynamic"
         LD_STRIP="gnu/stripgcc.lnk"
 	;;
+*darwin*)
+	# not ELF
+	DLL_EXT=".dylib"
+	DLL_FLAGS=""
+	;;
 interix3*)
 	# not ELF
 	DLL_FLAGS="-shared"
--- arj-3.10.22/arjcrypt.c
+++ arj-3.10.22/arjcrypt.c
@@ -329,6 +329,13 @@
 }
 #endif
 
+#if defined(__APPLE__)
+int main()
+{
+ return(0);
+}
+#endif
+
 /* External entry */
 
 #if TARGET==DOS