add support for LOCAL_MODULE_STEM_32 and LOCAL_MODULE_STEM_64

Some executables will need to be built for both 32-bit and 64-bit.
For linker/linker64, debuggerd/debuggerd64, and a few more, they
will be installed in the same path (/system/bin), but with different
filenames.  Allow the module to specify LOCAL_MODULE_STEM_32 and
LOCAL_MODULE_STEM_64 to name the two versions.

Change-Id: I573e8678c7332245a064f31246be0a05f0a9e25f

5 files changed, 23 insertions, 26 deletions

diff --git a/core/base_rules.mk b/core/base_rules.mk
index 051addc..43f351a 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -167,17 +167,7 @@ generated_sources_dir := $(call local-generated-sources-dir)
 ###########################################################
 # Pick a name for the intermediate and final targets
 ###########################################################
-ifndef LOCAL_MODULE_STEM
-  LOCAL_MODULE_STEM := $(LOCAL_MODULE)
-endif
-
-ifndef LOCAL_BUILT_MODULE_STEM
-  LOCAL_BUILT_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
-endif
-
-ifndef LOCAL_INSTALLED_MODULE_STEM
-  LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
-endif
+include $(BUILD_SYSTEM)/configure_module_stem.mk
 
 # OVERRIDE_BUILT_MODULE_PATH is only allowed to be used by the
 # internal SHARED_LIBRARIES build files.
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 5aa228f..8129014 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -199,6 +199,8 @@ LOCAL_C_INCLUDES_32:=
 LOCAL_C_INCLUDES_64:=
 LOCAL_MODULE_PATH_32:=
 LOCAL_MODULE_PATH_64:=
+LOCAL_MODULE_STEM_32:=
+LOCAL_MODULE_STEM_64:=
 
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.
diff --git a/core/configure_module_stem.mk b/core/configure_module_stem.mk
new file mode 100644
index 0000000..2823e37
--- /dev/null
+++ b/core/configure_module_stem.mk
@@ -0,0 +1,16 @@
+my_multilib_stem := $(LOCAL_MODULE_STEM_$(if $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_IS_64_BIT),64,32))
+ifdef my_multilib_stem
+LOCAL_MODULE_STEM := $(my_multilib_stem)
+endif
+
+ifndef LOCAL_MODULE_STEM
+  LOCAL_MODULE_STEM := $(LOCAL_MODULE)
+endif
+
+ifndef LOCAL_BUILT_MODULE_STEM
+  LOCAL_BUILT_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
+endif
+
+ifndef LOCAL_INSTALLED_MODULE_STEM
+  LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
+endif
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index 32f2c91..b3ca4fc 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -13,20 +13,9 @@ $(error This file should not be used to build host binaries.  Included by (or ne
 endif
 
 # The name of the target file, without any path prepended.
-# TODO: This duplicates logic from base_rules.mk because we need to
-#       know its results before base_rules.mk is included.
-#       Consolidate the duplicates.
-ifndef LOCAL_MODULE_STEM
-  LOCAL_MODULE_STEM := $(LOCAL_MODULE)
-endif
-
-ifndef LOCAL_BUILT_MODULE_STEM
-  LOCAL_BUILT_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
-endif
-
-ifndef LOCAL_INSTALLED_MODULE_STEM
-  LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_MODULE_STEM)$(LOCAL_MODULE_SUFFIX)
-endif
+# This duplicates logic from base_rules.mk because we need to
+# know its results before base_rules.mk is included.
+include $(BUILD_SYSTEM)/configure_module_stem.mk
 
 # base_rules.make defines $(intermediates), but we need its value
 # before we include base_rules.  Make a guess, and verify that
diff --git a/core/shared_library_internal.mk b/core/shared_library_internal.mk
index b5ac32a..3090d36 100644
--- a/core/shared_library_internal.mk
+++ b/core/shared_library_internal.mk
@@ -16,7 +16,7 @@ endif
 ifneq ($(strip $(OVERRIDE_BUILT_MODULE_PATH)),)
 $(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
 endif
-ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
+ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)$(LOCAL_MODULE_STEM_32)$(LOCAL_MODULE_STEM_64)),)
 $(error $(LOCAL_PATH): Cannot set module stem for a library)
 endif