Build host tools as 32bit on all Darwin machines.

Change-Id: I121b388056e68b787518c66a01c172bc4ffaef9b

core/combo/HOST_darwin-x86.mk

@@ -17,6 +17,13 @@
 # Configuration for Darwin (Mac OS X) on x86.
 # Included by combo/select.mk
 
+# We build everything in 32-bit, because some host tools are
+# 32-bit-only anyway (emulator, acc), and because it gives us
+# more consistency between the host tools and the target.
+HOST_GLOBAL_CFLAGS += -m32
+HOST_GLOBAL_LDFLAGS += -m32
+
+
 HOST_GLOBAL_CFLAGS += -fPIC
 HOST_NO_UNDEFINED_LDFLAGS := -Wl,-undefined,error
 
@@ -38,6 +45,7 @@ define transform-host-o-to-shared-lib-inner
     $(HOST_CXX) \
         -dynamiclib -single_module -read_only_relocs suppress \
         $(HOST_GLOBAL_LD_DIRS) \
+        $(HOST_GLOBAL_LDFLAGS) \
         $(PRIVATE_ALL_OBJECTS) \
         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
         $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
@@ -53,6 +61,7 @@ $(HOST_CXX) \
         -o $@ \
         -Wl,-dynamic -headerpad_max_install_names \
         $(HOST_GLOBAL_LD_DIRS) \
+        $(HOST_GLOBAL_LDFLAGS) \
         $(call normalize-target-libraries,$(PRIVATE_ALL_SHARED_LIBRARIES)) \
         $(PRIVATE_ALL_OBJECTS) \
         $(call normalize-target-libraries,$(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \