Support to build executables for TARGET_2ND_ARCH

By default, an executable is built for TARGET_ARCH.
To build it for TARGET_2ND_ARCH in a 64bit product, use:
LOCAL_32BIT_ONLY := true
To skip a module for TARGET_2ND_ARCH, use:
LOCAL_NO_2ND_ARCH := true

Bug: 11654773
Change-Id: Ieb293d25b21024bfe1b554044df338e064ac7b46

1 files changed, 69 insertions, 0 deletions

diff --git a/core/executable_internal.mk b/core/executable_internal.mk
new file mode 100644
index 0000000..33a573f
--- /dev/null
+++ b/core/executable_internal.mk
@@ -0,0 +1,69 @@
+###########################################################
+## Standard rules for building an executable file.
+##
+## Additional inputs from base_rules.make:
+## None.
+###########################################################
+
+ifeq ($(strip $(LOCAL_MODULE_CLASS)),)
+LOCAL_MODULE_CLASS := EXECUTABLES
+endif
+ifeq ($(strip $(LOCAL_MODULE_SUFFIX)),)
+LOCAL_MODULE_SUFFIX := $(TARGET_EXECUTABLE_SUFFIX)
+endif
+
+$(call target-executable-hook)
+
+skip_build_from_source :=
+ifdef LOCAL_PREBUILT_MODULE_FILE
+ifeq (,$(call if-build-from-source,$(LOCAL_MODULE),$(LOCAL_PATH)))
+include $(BUILD_PREBUILT)
+skip_build_from_source := true
+endif
+endif
+
+ifndef skip_build_from_source
+
+include $(BUILD_SYSTEM)/dynamic_binary.mk
+
+# Define PRIVATE_ variables from global vars
+my_target_global_ld_dirs := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LD_DIRS)
+ifeq ($(LOCAL_CLANG),true)
+my_target_global_ldflags := $(CLANG_TARGET_GLOBAL_LDFLAGS)
+else
+my_target_global_ldflags := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_LDFLAGS)
+endif
+my_target_fdo_lib := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_FDO_LIB)
+my_target_libgcc := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBGCC)
+my_target_crtbegin_dynamic_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_DYNAMIC_O)
+my_target_crtbegin_static_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTBEGIN_STATIC_O)
+my_target_crtend_o := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_CRTEND_O)
+ifdef LOCAL_SDK_VERSION
+# Make sure the prebuilt NDK paths are put ahead of the TARGET_GLOBAL_LD_DIRS,
+# so we don't have race condition when the system libraries (such as libc, libstdc++) are also built in the tree.
+my_target_global_ld_dirs := \
+    $(addprefix -L, $(patsubst %/,%,$(dir $(my_ndk_stl_shared_lib_fullpath))) \
+    $(my_ndk_version_root)/usr/lib) \
+    $(my_target_global_ld_dirs)
+my_target_global_ldflags := $(my_ndk_stl_shared_lib) $(my_target_global_ldflags)
+my_target_crtbegin_dynamic_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtbegin_dynamic.o)
+my_target_crtbegin_static_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtbegin_static.o)
+my_target_crtend_o := $(wildcard $(my_ndk_version_root)/usr/lib/crtend_android.o)
+endif
+$(linked_module): PRIVATE_TARGET_GLOBAL_LD_DIRS := $(my_target_global_ld_dirs)
+$(linked_module): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(my_target_global_ldflags)
+$(linked_module): PRIVATE_TARGET_FDO_LIB := $(my_target_fdo_lib)
+$(linked_module): PRIVATE_TARGET_LIBGCC := $(my_target_libgcc)
+$(linked_module): PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O := $(my_target_crtbegin_dynamic_o)
+$(linked_module): PRIVATE_TARGET_CRTBEGIN_STATIC_O := $(my_target_crtbegin_static_o)
+$(linked_module): PRIVATE_TARGET_CRTEND_O := $(my_target_crtend_o)
+
+ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
+$(linked_module): $(my_target_crtbegin_static_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
+	$(transform-o-to-static-executable)
+else
+$(linked_module): $(my_target_crtbegin_dynamic_o) $(all_objects) $(all_libraries) $(my_target_crtend_o)
+	$(transform-o-to-executable)
+endif
+
+endif  # skip_build_from_source