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