Disable 32-bit Darwin builds

Mac OSX 10.14 Mojave deprecates 32-bit executables, and the 10.14 SDK
does not successfully link 32-bit files.

Test: Install Xcode 10 beta, `m checkbuild host`
Change-Id: Ifad471fb88ead4bda870f49837d937fb5742f3f6

core/combo/HOST_darwin-x86.mk

@@ -1,69 +0,0 @@
-#
-# Copyright (C) 2006 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Configuration for Darwin (Mac OS X) on x86.
-# Included by combo/select.mk
-
-define $(combo_var_prefix)transform-shared-lib-to-toc
-$(call _gen_toc_command_for_macho,$(1),$(2))
-endef
-
-$(combo_2nd_arch_prefix)HOST_GLOBAL_ARFLAGS := cqs
-
-############################################################
-## Macros after this line are shared by the 64-bit config.
-
-HOST_CUSTOM_LD_COMMAND := true
-
-define transform-host-o-to-shared-lib-inner
-$(hide) $(PRIVATE_CXX) \
-        -dynamiclib -single_module -read_only_relocs suppress \
-        $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
-            $(PRIVATE_HOST_GLOBAL_LDFLAGS) \
-        ) \
-        $(PRIVATE_ALL_OBJECTS) \
-        $(addprefix -force_load , $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
-        $(PRIVATE_ALL_SHARED_LIBRARIES) \
-        $(PRIVATE_ALL_STATIC_LIBRARIES) \
-        $(PRIVATE_LDLIBS) \
-        -o $@ \
-        -install_name @rpath/$(notdir $@) \
-        -Wl,-rpath,@loader_path/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
-        -Wl,-rpath,@loader_path/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
-        $(PRIVATE_LDFLAGS)
-endef
-
-define transform-host-o-to-executable-inner
-$(hide) $(PRIVATE_CXX) \
-        $(foreach path,$(PRIVATE_RPATHS), \
-          -Wl,-rpath,@loader_path/$(path)) \
-        -o $@ \
-        -Wl,-headerpad_max_install_names \
-        $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
-           $(PRIVATE_HOST_GLOBAL_LDFLAGS) \
-        ) \
-        $(PRIVATE_ALL_SHARED_LIBRARIES) \
-        $(PRIVATE_ALL_OBJECTS) \
-        $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES) \
-        $(PRIVATE_ALL_STATIC_LIBRARIES) \
-        $(PRIVATE_LDFLAGS) \
-        $(PRIVATE_LDLIBS)
-endef
-
-# $(1): The file to check
-define get-file-size
-stat -f "%z" $(1)
-endef

core/combo/HOST_darwin-x86_64.mk

@@ -23,7 +23,44 @@ endef
 
 HOST_GLOBAL_ARFLAGS := cqs
 
-# We Reuse the following functions with the same name from HOST_darwin-x86.mk:
-# transform-host-o-to-shared-lib-inner
-# transform-host-o-to-executable-inner
-# get-file-size
+HOST_CUSTOM_LD_COMMAND := true
+
+define transform-host-o-to-shared-lib-inner
+$(hide) $(PRIVATE_CXX) \
+        -dynamiclib -single_module -read_only_relocs suppress \
+        $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
+            $(PRIVATE_HOST_GLOBAL_LDFLAGS) \
+        ) \
+        $(PRIVATE_ALL_OBJECTS) \
+        $(addprefix -force_load , $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES)) \
+        $(PRIVATE_ALL_SHARED_LIBRARIES) \
+        $(PRIVATE_ALL_STATIC_LIBRARIES) \
+        $(PRIVATE_LDLIBS) \
+        -o $@ \
+        -install_name @rpath/$(notdir $@) \
+        -Wl,-rpath,@loader_path/../$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+        -Wl,-rpath,@loader_path/$(notdir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)HOST_OUT_SHARED_LIBRARIES)) \
+        $(PRIVATE_LDFLAGS)
+endef
+
+define transform-host-o-to-executable-inner
+$(hide) $(PRIVATE_CXX) \
+        $(foreach path,$(PRIVATE_RPATHS), \
+          -Wl,-rpath,@loader_path/$(path)) \
+        -o $@ \
+        -Wl,-headerpad_max_install_names \
+        $(if $(PRIVATE_NO_DEFAULT_COMPILER_FLAGS),, \
+           $(PRIVATE_HOST_GLOBAL_LDFLAGS) \
+        ) \
+        $(PRIVATE_ALL_SHARED_LIBRARIES) \
+        $(PRIVATE_ALL_OBJECTS) \
+        $(PRIVATE_ALL_WHOLE_STATIC_LIBRARIES) \
+        $(PRIVATE_ALL_STATIC_LIBRARIES) \
+        $(PRIVATE_LDFLAGS) \
+        $(PRIVATE_LDLIBS)
+endef
+
+# $(1): The file to check
+define get-file-size
+stat -f "%z" $(1)
+endef

core/envsetup.mk

@@ -147,6 +147,11 @@ $(error Building on a 32-bit x86 host is not supported: $(UNAME)!)
 endif
 endif
 
+ifeq ($(HOST_OS),darwin)
+  # Mac no longer supports 32-bit executables
+  HOST_2ND_ARCH :=
+endif
+
 BUILD_ARCH := $(HOST_ARCH)
 BUILD_2ND_ARCH := $(HOST_2ND_ARCH)