104 lines
3.8 KiB
Makefile
104 lines
3.8 KiB
Makefile
#############################################################
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## Set up flags based on LOCAL_CXX_STL.
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## Input variables: LOCAL_CXX_STL, my_prefix
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## Output variables: My_cflags, my_c_includes, my_shared_libraries, etc.
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#############################################################
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# Select the appropriate C++ STL
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ifeq ($(strip $(LOCAL_CXX_STL)),default)
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ifndef LOCAL_SDK_VERSION
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# Platform code. Select the appropriate STL.
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my_cxx_stl := libc++
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ifdef LOCAL_IS_HOST_MODULE
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ifneq (,$(BUILD_HOST_static))
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my_cxx_stl := libc++_static
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endif
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endif
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else
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my_cxx_stl := ndk
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endif
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else
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my_cxx_stl := $(strip $(LOCAL_CXX_STL))
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ifdef LOCAL_SDK_VERSION
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# The NDK has historically used LOCAL_NDK_STL_VARIANT to specify the
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# STL. An Android.mk that specifies both LOCAL_CXX_STL and
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# LOCAL_SDK_VERSION will incorrectly try (and most likely fail) to use
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# the platform STL in an NDK binary. Emit an error to direct the user
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# toward the correct option.
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#
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# Note that we could also accept LOCAL_CXX_STL as an alias for
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# LOCAL_NDK_STL_VARIANT (and in fact soong does use the same name), but
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# the two options use different names for the STLs.
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): Must use LOCAL_NDK_STL_VARIANT rather than LOCAL_CXX_STL for NDK binaries)
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endif
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endif
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my_link_type := dynamic
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ifdef LOCAL_IS_HOST_MODULE
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ifneq (,$(BUILD_HOST_static))
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my_link_type := static
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endif
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ifeq (-static,$(filter -static,$(my_ldflags)))
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my_link_type := static
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endif
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else
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ifeq (true,$(LOCAL_FORCE_STATIC_EXECUTABLE))
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my_link_type := static
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endif
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endif
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my_cxx_ldlibs :=
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ifneq ($(filter $(my_cxx_stl),libc++ libc++_static),)
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ifeq ($($(my_prefix)OS),darwin)
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# libc++'s headers are annotated with availability macros that indicate
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# which version of Mac OS was the first to ship with a libc++ feature
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# available in its *system's* libc++.dylib. We do not use the system's
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# library, but rather ship our own. As such, these availability
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# attributes are meaningless for us but cause build breaks when we try
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# to use code that would not be available in the system's dylib.
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my_cppflags += -D_LIBCPP_DISABLE_AVAILABILITY
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endif
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# Note that the structure of this means that LOCAL_CXX_STL := libc++ will
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# use the static libc++ for static executables.
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ifeq ($(my_link_type),dynamic)
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ifeq ($(my_cxx_stl),libc++)
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my_shared_libraries += libc++
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else
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my_static_libraries += libc++_static
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endif
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else
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my_static_libraries += libc++_static
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endif
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ifdef LOCAL_IS_HOST_MODULE
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my_cppflags += -nostdinc++
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my_ldflags += -nostdlib++
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else
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my_static_libraries += libc++demangle
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ifeq ($(my_link_type),static)
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my_static_libraries += libm libc libunwind
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endif
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endif
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else ifeq ($(my_cxx_stl),ndk)
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# Using an NDK STL. Handled in binary.mk, except for the unwinder.
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# TODO: Switch the NDK over to the LLVM unwinder for non-arm32 architectures.
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ifeq (arm,$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
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my_static_libraries += libunwind_llvm
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my_ldflags += -Wl,--exclude-libs,libunwind_llvm.a
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else
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my_static_libraries += libgcc_stripped
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my_ldflags += -Wl,--exclude-libs,libgcc_stripped.a
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endif
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else ifeq ($(my_cxx_stl),libstdc++)
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): libstdc++ is not supported)
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else ifeq ($(my_cxx_stl),none)
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ifdef LOCAL_IS_HOST_MODULE
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my_cppflags += -nostdinc++
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my_ldflags += -nostdlib++
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endif
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else
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): $(my_cxx_stl) is not a supported STL.)
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endif
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