Rename TARGET_OS_* to HOST_OS_*.

runtime/vm/os_macos.cc

Index: runtime/vm/os_macos.cc
diff --git a/runtime/vm/os_macos.cc b/runtime/vm/os_macos.cc
index efeb76c81cae39900b3831715a87a93579b6d4f5..a4db52164a90072df4e3fcefada233b751ca4a2e 100644
--- a/runtime/vm/os_macos.cc
+++ b/runtime/vm/os_macos.cc
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
-#if defined(TARGET_OS_MACOS)
+#if defined(HOST_OS_MACOS)
 
 #include "vm/os.h"
 
@@ -15,7 +15,7 @@
 #include <sys/time.h>        // NOLINT
 #include <sys/resource.h>    // NOLINT
 #include <unistd.h>          // NOLINT
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
 #include <sys/sysctl.h>  // NOLINT
 #include <syslog.h>      // NOLINT
 #endif
@@ -27,7 +27,7 @@
 namespace dart {
 
 const char* OS::Name() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   return "ios";
 #else
   return "macos";
@@ -90,13 +90,13 @@ int64_t OS::GetCurrentTimeMicros() {
 }
 
 
-#if !TARGET_OS_IOS
+#if !HOST_OS_IOS
 static mach_timebase_info_data_t timebase_info;
 #endif
 
 
 int64_t OS::GetCurrentMonotonicTicks() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   // On iOS mach_absolute_time stops while the device is sleeping. Instead use
   // now - KERN_BOOTTIME to get a time difference that is not impacted by clock
   // changes. KERN_BOOTTIME will be updated by the system whenever the system
@@ -121,27 +121,27 @@ int64_t OS::GetCurrentMonotonicTicks() {
   result *= timebase_info.numer;
   result /= timebase_info.denom;
   return result;
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 }
 
 
 int64_t OS::GetCurrentMonotonicFrequency() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   return kMicrosecondsPerSecond;
 #else
   return kNanosecondsPerSecond;
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 }
 
 
 int64_t OS::GetCurrentMonotonicMicros() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   ASSERT(GetCurrentMonotonicFrequency() == kMicrosecondsPerSecond);
   return GetCurrentMonotonicTicks();
 #else
   ASSERT(GetCurrentMonotonicFrequency() == kNanosecondsPerSecond);
   return GetCurrentMonotonicTicks() / kNanosecondsPerMicrosecond;
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 }
 
 
@@ -167,7 +167,7 @@ int64_t OS::GetCurrentThreadCPUMicros() {
 
 
 intptr_t OS::ActivationFrameAlignment() {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
 #if TARGET_ARCH_ARM
   // Even if we generate code that maintains a stronger alignment, we cannot
   // assert the stronger stack alignment because C++ code will not maintain it.
@@ -183,11 +183,11 @@ intptr_t OS::ActivationFrameAlignment() {
 #else
 #error Unimplemented
 #endif
-#else   // TARGET_OS_IOS
+#else   // HOST_OS_IOS
   // OS X activation frames must be 16 byte-aligned; see "Mac OS X ABI
   // Function Call Guide".
   return 16;
-#endif  // TARGET_OS_IOS
+#endif  // HOST_OS_IOS
 }
 
 
@@ -314,7 +314,7 @@ intptr_t OS::StrNLen(const char* s, intptr_t n) {
 
 
 void OS::Print(const char* format, ...) {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   va_list args;
   va_start(args, format);
   vsyslog(LOG_INFO, format, args);
@@ -407,7 +407,7 @@ void OS::RegisterCodeObservers() {}
 
 
 void OS::PrintErr(const char* format, ...) {
-#if TARGET_OS_IOS
+#if HOST_OS_IOS
   va_list args;
   va_start(args, format);
   vsyslog(LOG_ERR, format, args);
@@ -445,4 +445,4 @@ void OS::Exit(int code) {
 
 }  // namespace dart
 
-#endif  // defined(TARGET_OS_MACOS)
+#endif  // defined(HOST_OS_MACOS)