config.mk revision 32f7ff14ce7fe30679beffb448a4a0e6f45cfcc4 
1## Clang configurations.
2
3LLVM_PREBUILTS_VERSION := 3.6
4LLVM_PREBUILTS_PATH := prebuilts/clang/$(BUILD_OS)-x86/host/$(LLVM_PREBUILTS_VERSION)/bin
5LLVM_RTLIB_PATH := $(LLVM_PREBUILTS_PATH)/../lib/clang/$(LLVM_PREBUILTS_VERSION)/lib/linux/
6
7CLANG := $(LLVM_PREBUILTS_PATH)/clang$(BUILD_EXECUTABLE_SUFFIX)
8CLANG_CXX := $(LLVM_PREBUILTS_PATH)/clang++$(BUILD_EXECUTABLE_SUFFIX)
9LLVM_AS := $(LLVM_PREBUILTS_PATH)/llvm-as$(BUILD_EXECUTABLE_SUFFIX)
10LLVM_LINK := $(LLVM_PREBUILTS_PATH)/llvm-link$(BUILD_EXECUTABLE_SUFFIX)
11
12CLANG_TBLGEN := $(BUILD_OUT_EXECUTABLES)/clang-tblgen$(BUILD_EXECUTABLE_SUFFIX)
13LLVM_TBLGEN := $(BUILD_OUT_EXECUTABLES)/llvm-tblgen$(BUILD_EXECUTABLE_SUFFIX)
14
15# Clang flags for all host or target rules
16CLANG_CONFIG_EXTRA_ASFLAGS :=
17CLANG_CONFIG_EXTRA_CFLAGS :=
18CLANG_CONFIG_EXTRA_CONLYFLAGS := -std=gnu99
19CLANG_CONFIG_EXTRA_CPPFLAGS :=
20CLANG_CONFIG_EXTRA_LDFLAGS :=
21
22CLANG_CONFIG_EXTRA_CFLAGS += \
23  -D__compiler_offsetof=__builtin_offsetof
24
25# Help catch common 32/64-bit errors.
26CLANG_CONFIG_EXTRA_CFLAGS += \
27  -Werror=int-conversion
28
29# Disable overly aggressive warning for macros defined with a leading underscore
30# This used to happen in AndroidConfig.h, which was included everywhere.
31# TODO: can we remove this now?
32CLANG_CONFIG_EXTRA_CFLAGS += \
33  -Wno-reserved-id-macro
34
35# Disable overly aggressive warning for format strings.
36# Bug: 20148343
37CLANG_CONFIG_EXTRA_CFLAGS += \
38  -Wno-format-pedantic
39
40# Workaround for ccache with clang.
41# See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
42CLANG_CONFIG_EXTRA_CFLAGS += \
43  -Wno-unused-command-line-argument
44
45# Disable -Winconsistent-missing-override until we can clean up the existing
46# codebase for it.
47CLANG_CONFIG_EXTRA_CPPFLAGS += \
48  -Wno-inconsistent-missing-override
49
50CLANG_CONFIG_UNKNOWN_CFLAGS := \
51  -finline-functions \
52  -finline-limit=64 \
53  -fno-canonical-system-headers \
54  -Wno-clobbered \
55  -fno-devirtualize \
56  -fno-tree-sra \
57  -fprefetch-loop-arrays \
58  -funswitch-loops \
59  -Wmaybe-uninitialized \
60  -Wno-error=clobbered \
61  -Wno-error=maybe-uninitialized \
62  -Wno-error=unused-but-set-parameter \
63  -Wno-error=unused-but-set-variable \
64  -Wno-free-nonheap-object \
65  -Wno-literal-suffix \
66  -Wno-maybe-uninitialized \
67  -Wno-old-style-declaration \
68  -Wno-psabi \
69  -Wno-unused-but-set-parameter \
70  -Wno-unused-but-set-variable \
71  -Wno-unused-local-typedefs \
72  -Wunused-but-set-parameter \
73  -Wunused-but-set-variable
74
75# Clang flags for all host rules
76CLANG_CONFIG_HOST_EXTRA_ASFLAGS :=
77CLANG_CONFIG_HOST_EXTRA_CFLAGS :=
78CLANG_CONFIG_HOST_EXTRA_CPPFLAGS :=
79CLANG_CONFIG_HOST_EXTRA_LDFLAGS :=
80
81# Clang flags for all host cross rules
82CLANG_CONFIG_HOST_CROSS_EXTRA_ASFLAGS :=
83CLANG_CONFIG_HOST_CROSS_EXTRA_CFLAGS :=
84CLANG_CONFIG_HOST_CROSS_EXTRA_CPPFLAGS :=
85CLANG_CONFIG_HOST_CROSS_EXTRA_LDFLAGS :=
86
87# Clang flags for all target rules
88CLANG_CONFIG_TARGET_EXTRA_ASFLAGS :=
89CLANG_CONFIG_TARGET_EXTRA_CFLAGS := -nostdlibinc
90CLANG_CONFIG_TARGET_EXTRA_CPPFLAGS := -nostdlibinc
91CLANG_CONFIG_TARGET_EXTRA_LDFLAGS :=
92
93CLANG_DEFAULT_UB_CHECKS := \
94  bool \
95  integer-divide-by-zero \
96  return \
97  returns-nonnull-attribute \
98  shift-exponent \
99  unreachable \
100  vla-bound \
101
102# TODO(danalbert): The following checks currently have compiler performance
103# issues.
104# CLANG_DEFAULT_UB_CHECKS += alignment
105# CLANG_DEFAULT_UB_CHECKS += bounds
106# CLANG_DEFAULT_UB_CHECKS += enum
107# CLANG_DEFAULT_UB_CHECKS += float-cast-overflow
108# CLANG_DEFAULT_UB_CHECKS += float-divide-by-zero
109# CLANG_DEFAULT_UB_CHECKS += nonnull-attribute
110# CLANG_DEFAULT_UB_CHECKS += null
111# CLANG_DEFAULT_UB_CHECKS += shift-base
112# CLANG_DEFAULT_UB_CHECKS += signed-integer-overflow
113
114# TODO(danalbert): Fix UB in libc++'s __tree so we can turn this on.
115# https://llvm.org/PR19302
116# http://reviews.llvm.org/D6974
117# CLANG_DEFAULT_UB_CHECKS += object-size
118
119# HOST config
120clang_2nd_arch_prefix :=
121include $(BUILD_SYSTEM)/clang/HOST_$(HOST_ARCH).mk
122
123# HOST_2ND_ARCH config
124ifdef HOST_2ND_ARCH
125clang_2nd_arch_prefix := $(HOST_2ND_ARCH_VAR_PREFIX)
126include $(BUILD_SYSTEM)/clang/HOST_$(HOST_2ND_ARCH).mk
127endif
128
129ifdef HOST_CROSS_OS
130include $(BUILD_SYSTEM)/clang/HOST_CROSS_$(HOST_CROSS_OS).mk
131endif
132
133# TARGET config
134clang_2nd_arch_prefix :=
135include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_ARCH).mk
136
137# TARGET_2ND_ARCH config
138ifdef TARGET_2ND_ARCH
139clang_2nd_arch_prefix := $(TARGET_2ND_ARCH_VAR_PREFIX)
140include $(BUILD_SYSTEM)/clang/TARGET_$(TARGET_2ND_ARCH).mk
141endif
142
143ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS := -fno-omit-frame-pointer
144ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS := -Wl,-u,__asan_preinit
145
146ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES :=
147ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES := libasan
148
149# This allows us to use the superset of functionality that compiler-rt
150# provides to Clang (for supporting features like -ftrapv).
151COMPILER_RT_CONFIG_EXTRA_STATIC_LIBRARIES := libcompiler_rt-extras
152
153ifeq ($(HOST_PREFER_32_BIT),true)
154# We don't have 32-bit prebuilt libLLVM/libclang, so force to build them from source.
155FORCE_BUILD_LLVM_COMPONENTS := true
156endif
157