6feb6d5607
This change basically ported our target multilib to the host side. It supports 2 host build modes: x86 and x86_64 multilib build. For now you need to set "BUILD_HOST_64bit=true" to switch to x86_64 multilib build. Later we'll default to x86_64 build and have a flag to force 32-bit only build, which may be needed by SDK build. In host module definition, like in target ones, you can use the following LOCAL variables to set up multilib configuration: LOCAL_MULTILIB: can be "both", "first", "32" or "64". It also supports the same set of arch or 32-vs-64 specific LOCAL variables. By default, it builds only for the first arch. To keep path compatibility, in x86_64 build files are still output to out/host/linux-x86; Both 32-bit and 64-bit executables are in out/host/linux-86/bin; In x86_64 build 32-bit shared libraries are installed to out/host/linux-x86/lib32 and 64-bit shared libraries are installed to out/host/linux-x86/lib; 32-bit object files are output to out/host/linux-x86/obj32 and 64-bit object files are output to out/host/linux-x86/obj. Bug: 13751317 Change-Id: I6044f83b7db369a33e05209e8c588eb6dc83409f
78 lines
2.5 KiB
Makefile
78 lines
2.5 KiB
Makefile
# We don't automatically set up rules to build packages for both
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# TARGET_ARCH and TARGET_2ND_ARCH.
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# By default, an package is built for TARGET_ARCH.
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# To build it for TARGET_2ND_ARCH in a 64bit product, use "LOCAL_MULTILIB := 32".
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my_prefix := TARGET_
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include $(BUILD_SYSTEM)/multilib.mk
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ifeq ($(TARGET_SUPPORTS_32_BIT_APPS)|$(TARGET_SUPPORTS_64_BIT_APPS),true|true)
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# packages default to building for either architecture,
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# the preferred if its supported, otherwise the non-preferred.
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else ifeq ($(TARGET_SUPPORTS_64_BIT_APPS),true)
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# only 64-bit apps supported
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ifeq ($(filter $(my_module_multilib),64 both first),$(my_module_multilib))
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# if my_module_multilib was 64, both, first, or unset, build for 64-bit
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my_module_multilib := 64
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else
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# otherwise don't build this app
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my_module_multilib := none
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endif
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else
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# only 32-bit apps supported
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ifeq ($(filter $(my_module_multilib),32 both),$(my_module_multilib))
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# if my_module_multilib was 32, both, or unset, build for 32-bit
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my_module_multilib := 32
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else ifeq ($(my_module_multilib),first)
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ifndef TARGET_IS_64_BIT
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# if my_module_multilib was first and this is a 32-bit build, build for
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# 32-bit
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my_module_multilib := 32
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else
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# if my_module_multilib was first and this is a 64-bit build, don't build
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# this app
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my_module_multilib := none
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endif
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else
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# my_module_mulitlib was 64 or none, don't build this app
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my_module_multilib := none
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endif
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endif
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LOCAL_NO_2ND_ARCH_MODULE_SUFFIX := true
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# if TARGET_PREFER_32_BIT_APPS is set, try to build 32-bit first
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ifdef TARGET_2ND_ARCH
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ifeq ($(TARGET_PREFER_32_BIT_APPS),true)
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LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
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else
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LOCAL_2ND_ARCH_VAR_PREFIX :=
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endif
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endif
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# check if preferred arch is supported
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include $(BUILD_SYSTEM)/module_arch_supported.mk
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ifeq ($(my_module_arch_supported),true)
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# first arch is supported
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include $(BUILD_SYSTEM)/package_internal.mk
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else ifneq (,$(TARGET_2ND_ARCH))
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# check if the non-preferred arch is the primary or secondary
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ifeq ($(TARGET_PREFER_32_BIT_APPS),true)
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LOCAL_2ND_ARCH_VAR_PREFIX :=
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else
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LOCAL_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX)
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endif
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# check if non-preferred arch is supported
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include $(BUILD_SYSTEM)/module_arch_supported.mk
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ifeq ($(my_module_arch_supported),true)
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# secondary arch is supported
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include $(BUILD_SYSTEM)/package_internal.mk
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endif
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endif # TARGET_2ND_ARCH
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LOCAL_2ND_ARCH_VAR_PREFIX :=
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LOCAL_NO_2ND_ARCH_MODULE_SUFFIX :=
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my_module_arch_supported :=
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