config.mk revision 343ed674e35ae0911542abe67dca3fb3a1cccf95 
1## Clang configurations.
2
3# WITHOUT_CLANG covers both HOST and TARGET
4ifeq ($(WITHOUT_CLANG),true)
5WITHOUT_TARGET_CLANG := true
6WITHOUT_HOST_CLANG := true
7endif
8
9LLVM_PREBUILTS_VERSION := 3.6
10LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/$(LLVM_PREBUILTS_VERSION)/bin
11LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib/clang/$(LLVM_PREBUILTS_VERSION)/lib/linux/
12
13CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
14CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)
15LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX)
16LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX)
17
18CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
19LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX)
20
21# The C/C++ compiler can be wrapped by setting the CC/CXX_WRAPPER vars.
22ifdef CC_WRAPPER
23  ifneq ($(CC_WRAPPER),$(firstword $(CLANG)))
24    CLANG := $(CC_WRAPPER) $(CLANG)
25  endif
26endif
27ifdef CXX_WRAPPER
28  ifneq ($(CXX_WRAPPER),$(firstword $(CLANG_CXX)))
29    CLANG_CXX := $(CXX_WRAPPER) $(CLANG_CXX)
30  endif
31endif
32
33# Clang flags for all host or target rules
34CLANG_CONFIG_EXTRA_ASFLAGS :=
35CLANG_CONFIG_EXTRA_CFLAGS :=
36CLANG_CONFIG_EXTRA_CONLYFLAGS := -std=gnu99
37CLANG_CONFIG_EXTRA_CPPFLAGS :=
38CLANG_CONFIG_EXTRA_LDFLAGS :=
39
40CLANG_CONFIG_EXTRA_CFLAGS += \
41  -D__compiler_offsetof=__builtin_offsetof
42
43# Help catch common 32/64-bit errors.
44CLANG_CONFIG_EXTRA_CFLAGS += \
45  -Werror=int-conversion
46
47# Disable overly aggressive warning for macros defined with a leading underscore
48# This happens in AndroidConfig.h, which is included nearly everywhere.
49CLANG_CONFIG_EXTRA_CFLAGS += \
50  -Wno-reserved-id-macro
51
52# Workaround for ccache with clang.
53# See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
54CLANG_CONFIG_EXTRA_CFLAGS += \
55  -Wno-unused-command-line-argument
56
57# Disable -Winconsistent-missing-override until we can clean up the existing
58# codebase for it.
59CLANG_CONFIG_EXTRA_CPPFLAGS += \
60  -Wno-inconsistent-missing-override
61
62CLANG_CONFIG_UNKNOWN_CFLAGS := \
63  -finline-functions \
64  -finline-limit=64 \
65  -fno-canonical-system-headers \
66  -fno-tree-sra \
67  -fprefetch-loop-arrays \
68  -funswitch-loops \
69  -Wmaybe-uninitialized \
70  -Wno-error=maybe-uninitialized \
71  -Wno-free-nonheap-object \
72  -Wno-literal-suffix \
73  -Wno-maybe-uninitialized \
74  -Wno-old-style-declaration \
75  -Wno-psabi \
76  -Wno-unused-but-set-variable \
77  -Wno-unused-but-set-parameter \
78  -Wno-unused-local-typedefs
79
80# Clang flags for all host rules
81CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
82CLANG_CONFIG_HOST_EXTRA_CFLAGS :=
83CLANG_CONFIG_HOST_EXTRA_CPPFLAGS :=
84CLANG_CONFIG_HOST_EXTRA_LDFLAGS :=
85
86# Clang flags for all target rules
87CLANG_CONFIG_TARGET_EXTRA_ASFLAGS :=
88CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc
89CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc
90CLANG_CONFIG_TARGET_EXTRA_LDFLAGS :=
91
92# HOST config
93clang_2nd_arch_prefix :=
94include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk
95
96# HOST_2ND_ARCH config
97ifdef HOST_2ND_ARCH
98clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX)
99include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk
100endif
101
102# TARGET config
103clang_2nd_arch_prefix :=
104include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk
105
106# TARGET_2ND_ARCH config
107ifdef TARGET_2ND_ARCH
108clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
109include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
110endif
111
112# Address sanitizer clang config
113ADDRESS_SANITIZER_RUNTIME_LIBRARY := libclang_rt.asan_$(TARGET_ARCH)_android
114ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fsanitize=address -fno-omit-frame-pointer
115ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
116
117ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES := libdl $(ADDRESS_SANITIZER_RUNTIME_LIBRARY)
118ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
119
120# This allows us to use the superset of functionality that compiler-rt
121# provides to Clang (for supporting features like -ftrapv).
122COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras
123
124ifeq ($(HOST_PREFER_32_BIT),true)
125# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source.
126FORCE_BUILD_LLVM_COMPONENTS := true
127endif
128