Legacy SDKs may call main master (e.g., iPhoneOS6.1).

Author: tslmy

configure.ac

@@ -225,6 +225,8 @@ if test "$my_htop_platform" = darwin; then
    AC_CHECK_TYPES([thread_extended_info_data_t], [], [], [[#include <mach/thread_info.h>]])
    AC_CHECK_MEMBERS([struct vm_statistics64.compressor_page_count], [], [], [[#include <mach/mach_host.h>]])
    AC_CHECK_MEMBERS([struct vm_statistics64.external_page_count], [], [], [[#include <mach/mach_host.h>]])
+
+   AC_CHECK_DECLS([kIOMainPortDefault], [], [], [[#include <IOKit/IOKitLib.h>]])
 fi
 
 # ----------------------------------------------------------------------

darwin/DarwinMachine.c

@@ -16,6 +16,7 @@ in the source distribution for its full text.
 #include <unistd.h>
 #include <sys/mman.h>
 #include <sys/sysctl.h>
+#include <Availability.h>
 
 #include "CRT.h"
 #include "Machine.h"
@@ -24,6 +25,10 @@ in the source distribution for its full text.
 #include "generic/openzfs_sysctl.h"
 #include "zfs/ZfsArcStats.h"
 
+// Compatibility for older SDKs.
+#if defined(HAVE_DECL_KIOMAINPORTDEFAULT) && !HAVE_DECL_KIOMAINPORTDEFAULT
+#define kIOMainPortDefault kIOMasterPortDefault
+#endif
 
 static void DarwinMachine_getHostInfo(host_basic_info_data_t* p) {
    mach_msg_type_number_t info_size = HOST_BASIC_INFO_COUNT;