cxx_stl_setup.mk revision ea07676552f18ccb01bbbfe6e34dc6c0ac88d3be 
1#############################################################
2## Set up flags based on LOCAL_CXX_STL.
3## Input variables: LOCAL_CXX_STL
4## Output variables: My_cflags, my_c_includes, my_shared_libraries, etc.
5#############################################################
6
7# Select the appropriate C++ STL
8ifeq ($(strip $(LOCAL_CXX_STL)),default)
9    ifndef LOCAL_SDK_VERSION
10        # Platform code. Select the appropriate STL.
11        ifndef USE_MINGW
12            my_cxx_stl := libc++
13            ifdef LOCAL_IS_HOST_MODULE
14                ifneq (,$(BUILD_HOST_static))
15                    my_cxx_stl := libc++_static
16                endif
17            endif
18        else
19            # libc++ is not supported on mingw.
20            my_cxx_stl := libstdc++
21        endif
22    else
23        my_cxx_stl := ndk
24    endif
25else
26    my_cxx_stl := $(strip $(LOCAL_CXX_STL))
27endif
28
29# Yes, this is actually what the clang driver does.
30HOST_linux_dynamic_gcclibs := -lgcc_s -lgcc -lc -lgcc_s -lgcc
31HOST_linux_static_gcclibs := -Wl,--start-group -lgcc -lgcc_eh -lc -Wl,--end-group
32HOST_darwin_dynamic_gcclibs := -lc -lSystem
33HOST_darwin_static_gcclibs := NO_STATIC_HOST_BINARIES_ON_DARWIN
34
35my_link_type := dynamic
36ifdef LOCAL_IS_HOST_MODULE
37    ifneq (,$(BUILD_HOST_static))
38        my_link_type := static
39    endif
40    ifeq (-static,$(filter -static,$(my_ldflags)))
41        my_link_type := static
42    endif
43else
44    ifeq (true,$(LOCAL_FORCE_STATIC_EXECUTABLE))
45        my_link_type := static
46    endif
47endif
48
49ifneq ($(filter $(my_cxx_stl),libc++ libc++_static),)
50    my_cflags += -D_USING_LIBCXX
51    my_c_includes += external/libcxx/include
52
53    ifeq ($(my_link_type),dynamic)
54        my_shared_libraries += libc++
55    else
56        my_static_libraries += libc++_static
57    endif
58
59    ifdef LOCAL_IS_HOST_MODULE
60        my_cppflags += -nostdinc++
61        my_ldflags += -nodefaultlibs
62        my_ldlibs += -lpthread -lm
63        my_ldlibs += $($(my_prefix)$(HOST_OS)_$(my_link_type)_gcclibs)
64    else
65        ifeq (arm,$($(my_prefix)$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH))
66            my_static_libraries += libunwind_llvm
67            my_ldflags += -Wl,--exclude-libs,libunwind_llvm.a
68        endif
69
70        ifeq ($(my_link_type),static)
71            my_static_libraries += libm libc libdl
72        else
73            my_shared_libraries += libdl
74        endif
75    endif
76else ifeq ($(my_cxx_stl),ndk)
77    # Using an NDK STL. Handled in binary.mk.
78    ifndef LOCAL_IS_HOST_MODULE
79        my_system_shared_libraries += libstdc++
80    endif
81else ifeq ($(my_cxx_stl),libstdc++)
82    # Using bionic's basic libstdc++. Not actually an STL. Only around until the
83    # tree is in good enough shape to not need it.
84    ifndef LOCAL_IS_HOST_MODULE
85        my_c_includes += bionic/libstdc++/include
86        my_system_shared_libraries += libstdc++
87    endif
88    # Host builds will use GNU libstdc++.
89else ifeq ($(my_cxx_stl),none)
90    ifdef LOCAL_IS_HOST_MODULE
91        my_cppflags += -nostdinc++
92        my_ldflags += -nodefaultlibs
93        my_ldlibs += $($(my_prefix)$(HOST_OS)_$(my_link_type)_gcclibs)
94    endif
95else
96    $(error $(LOCAL_PATH): $(LOCAL_MODULE): $(my_cxx_stl) is not a supported STL.)
97endif
98