platform_build/core/executable_prefer_symlink.mk

# include this makefile to create the LOCAL_MODULE symlink to the primary version binary.
# but this requires the primary version name specified via LOCAL_MODULE_STEM_32 or LOCAL_MODULE_STEM_64,
# and different with the LOCAL_MODULE value
#
# Note: now only limited to the binaries that will be installed under system/bin directory

# Create link to the one used depending on the target
# configuration. Note that we require the TARGET_IS_64_BIT
# check because 32 bit targets may not define TARGET_PREFER_32_BIT_APPS
# et al. since those variables make no sense in that context.
ifneq ($(LOCAL_IS_HOST_MODULE),true)
  my_symlink := $(addprefix $(TARGET_OUT)/bin/, $(LOCAL_MODULE))
  ifeq ($(TARGET_IS_64_BIT),true)
    ifeq ($(TARGET_SUPPORTS_64_BIT_APPS)|$(TARGET_SUPPORTS_32_BIT_APPS),true|true)
      # We support both 32 and 64 bit apps, so we will have to
      # base our decision on whether the target prefers one or the
      # other.
      ifeq ($(TARGET_PREFER_32_BIT_APPS),true)
        $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
      else
        $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
      endif
    else ifeq ($(TARGET_SUPPORTS_64_BIT_APPS),true)
      # We support only 64 bit apps.
      $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
    else
      # We support only 32 bit apps.
      $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
    endif
  else
    $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
  endif
else
  my_symlink := $(addprefix $(HOST_OUT)/bin/, $(LOCAL_MODULE))
  ifneq ($(HOST_PREFER_32_BIT),true)
$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_64)
  else
$(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32)
  endif
endif

# $(my_symlink) doesn't need to depend on $(PRIVATE_SRC_BINARY_NAME): we can generate symlink to nonexistent file.
# If you add the dependency, make would compare the timestamp of a file against that of its symlink:
# they are always equal, because make follows symlink.
$(my_symlink):
	@echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)"
	@mkdir -p $(dir $@)
	@rm -rf $@
	$(hide) ln -sf $(PRIVATE_SRC_BINARY_NAME) $@

# We need this so that the installed files could be picked up based on the
# local module name
ALL_MODULES.$(LOCAL_MODULE).INSTALLED += $(my_symlink)

# Create the symlink when you run mm/mmm or "make <module_name>"
$(LOCAL_MODULE) : $(my_symlink)

my_symlink :=