115 lines
4 KiB
Makefile
115 lines
4 KiB
Makefile
#############################################################
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## Set up flags based on LOCAL_CXX_STL.
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## Input variables: LOCAL_CXX_STL
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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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ifdef USE_MINGW
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# libc++ is not supported on mingw.
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my_cxx_stl := libstdc++
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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): $(LOCAL_MODULE): Must use LOCAL_NDK_STL_VARIANT rather than LOCAL_CXX_STL for NDK binaries)
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endif
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endif
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# Yes, this is actually what the clang driver does.
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HOST_linux_dynamic_gcclibs := -lgcc_s -lgcc -lc -lgcc_s -lgcc
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HOST_linux_static_gcclibs := -Wl,--start-group -lgcc -lgcc_eh -lc -Wl,--end-group
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HOST_darwin_dynamic_gcclibs := -lc -lSystem
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HOST_darwin_static_gcclibs := NO_STATIC_HOST_BINARIES_ON_DARWIN
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my_link_type := dynamic
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ifdef LOCAL_IS_HOST_MODULE
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ifneq (,$(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,$(LOCAL_FORCE_STATIC_EXECUTABLE))
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my_link_type := static
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endif
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endif
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ifneq ($(filter $(my_cxx_stl),libc++ libc++_static),)
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my_cflags += -D_USING_LIBCXX
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my_c_includes += external/libcxx/include
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# Note that the structure of this means that LOCAL_CXX_STL := libc++ will
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# use the static libc++ for static executables.
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ifeq ($(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 += -nodefaultlibs
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my_ldlibs += -lpthread -lm
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my_ldlibs += $($(my_prefix)$(HOST_OS)_$(my_link_type)_gcclibs)
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else
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ifeq (arm,$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
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my_static_libraries += libunwind_llvm
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my_ldflags += -Wl,--exclude-libs,libunwind_llvm.a
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endif
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ifeq ($(my_link_type),static)
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my_static_libraries += libm libc libdl
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else
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my_shared_libraries += libdl
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endif
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endif
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else ifeq ($(my_cxx_stl),ndk)
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# Using an NDK STL. Handled in binary.mk.
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ifndef LOCAL_IS_HOST_MODULE
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my_system_shared_libraries += libstdc++
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endif
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else ifeq ($(my_cxx_stl),libstdc++)
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# Using bionic's basic libstdc++. Not actually an STL. Only around until the
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# tree is in good enough shape to not need it.
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ifndef LOCAL_IS_HOST_MODULE
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my_c_includes += bionic/libstdc++/include
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my_system_shared_libraries += libstdc++
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endif
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# Host builds will use GNU libstdc++.
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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 += -nodefaultlibs
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my_ldlibs += $($(my_prefix)$(HOST_OS)_$(my_link_type)_gcclibs)
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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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