Don't try to build the emulator on Mac OS if the right tools aren't installed.
Change-Id: I3cd2f82f9ee64174bddbb12a18ca8fcf23bdcebd
diff --git a/core/main.mk b/core/main.mk
index 08efbda..2083887 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -162,10 +162,32 @@
ifneq ($(findstring llvm-gcc,$(GCC_REALPATH)),)
# Using LLVM GCC results in a non functional emulator due to it
# not honouring global register variables
- $(warning ****************************************)
- $(warning * gcc is linked to llvm-gcc which will *)
- $(warning * not create a useable emulator. *)
- $(warning ****************************************)
+ ifneq ($(strip $(BUILD_EMULATOR)),)
+ $(warning ****************************************)
+ $(warning * gcc is linked to llvm-gcc which will *)
+ $(warning * not create a useable emulator. *)
+ $(warning ****************************************)
+ endif
+ BUILD_EMULATOR := false
+else
+ BUILD_EMULATOR := true
+endif
+# When building on Leopard or above, we need to use the 10.4 SDK
+# or the generated binary will not run on Tiger.
+darwin_version := $(strip $(shell sw_vers -productVersion))
+ifneq ($(filter 10.1 10.2 10.3 10.1.% 10.2.% 10.3.% 10.4 10.4.%,$(darwin_version)),)
+ $(error Building the Android emulator requires OS X 10.5 or above)
+endif
+ifneq ($(filter 10.5 10.5.% 10.6 10.6.%,$(darwin_version)),)
+ # We are on Leopard or Snow Leopard
+ MSDK=10.5
+else
+ # We are on Lion or beyond, and 10.6 SDK is the minimum in Xcode 4.x
+ MSDK=10.6
+endif
+MACOSX_SDK := /Developer/SDKs/MacOSX$(MSDK).sdk
+ifeq ($(strip $(wildcard $(MACOSX_SDK))),)
+ BUILD_EMULATOR := false
endif
endif
