1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
if(NOT DEFINED LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE)
if(CMAKE_COMPILER_IS_GNUCXX)
set(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE ON)
elseif( MSVC )
set(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE OFF)
elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
set(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE ON)
elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel" )
set(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE ON)
endif()
endif()
function(_get_compile_options_from_flags output_var)
set(compile_options "")
if(LIBC_TARGET_ARCHITECTURE_IS_RISCV64 OR(LIBC_CPU_FEATURES MATCHES "FMA"))
check_flag(ADD_FMA_FLAG ${FMA_OPT_FLAG} ${ARGN})
endif()
check_flag(ADD_ROUND_OPT_FLAG ${ROUND_OPT_FLAG} ${ARGN})
check_flag(ADD_EXPLICIT_SIMD_OPT_FLAG ${EXPLICIT_SIMD_OPT_FLAG} ${ARGN})
check_flag(ADD_MISC_MATH_BASIC_OPS_OPT_FLAG ${MISC_MATH_BASIC_OPS_OPT_FLAG} ${ARGN})
if(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE)
if(ADD_FMA_FLAG)
if(LIBC_TARGET_ARCHITECTURE_IS_X86_64)
list(APPEND compile_options "-mavx2")
list(APPEND compile_options "-mfma")
elseif(LIBC_TARGET_ARCHITECTURE_IS_RISCV64)
list(APPEND compile_options "-D__LIBC_RISCV_USE_FMA")
endif()
# For clang, we will build the math functions with `-fno-math-errno` so that
# __builtin_fma* will generate the fused-mutliply-add instructions. We
# don't put the control flag to the public config yet, and see if it makes
# sense to just enable this flag by default.
if(LIBC_ADD_FNO_MATH_ERRNO)
list(APPEND compile_options "-fno-math-errno")
endif()
endif()
if(ADD_ROUND_OPT_FLAG)
if(LIBC_TARGET_ARCHITECTURE_IS_X86_64)
# ROUND_OPT_FLAG is only enabled if SSE4.2 is detected, not just SSE4.1,
# because there was code to check for SSE4.2 already, and few CPUs only
# have SSE4.1.
list(APPEND compile_options "-msse4.2")
endif()
if(LIBC_COMPILER_HAS_BUILTIN_CEIL_FLOOR_RINT_TRUNC)
list(APPEND compile_options
"-D__LIBC_USE_BUILTIN_CEIL_FLOOR_RINT_TRUNC")
endif()
if(LIBC_COMPILER_HAS_BUILTIN_ROUND)
list(APPEND compile_options "-D__LIBC_USE_BUILTIN_ROUND")
endif()
if(LIBC_COMPILER_HAS_BUILTIN_ROUNDEVEN)
list(APPEND compile_options "-D__LIBC_USE_BUILTIN_ROUNDEVEN")
endif()
endif()
if(ADD_EXPLICIT_SIMD_OPT_FLAG)
list(APPEND compile_options "-D__LIBC_EXPLICIT_SIMD_OPT")
endif()
if(ADD_MISC_MATH_BASIC_OPS_OPT_FLAG)
list(APPEND compile_options "-D__LIBC_MISC_MATH_BASIC_OPS_OPT")
if(LIBC_COMPILER_HAS_BUILTIN_FMAX_FMIN)
list(APPEND compile_options "-D__LIBC_USE_BUILTIN_FMAX_FMIN")
endif()
if(LIBC_COMPILER_HAS_BUILTIN_FMAXF16_FMINF16)
list(APPEND compile_options "-D__LIBC_USE_BUILTIN_FMAXF16_FMINF16")
endif()
if("FullFP16" IN_LIST LIBC_CPU_FEATURES AND
CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
list(APPEND compile_options
"SHELL:-Xclang -target-feature -Xclang +fullfp16")
endif()
endif()
elseif(MSVC)
if(ADD_FMA_FLAG)
list(APPEND compile_options "/arch:AVX2")
endif()
if(ADD_EXPLICIT_SIMD_OPT_FLAG)
list(APPEND compile_options "/D__LIBC_EXPLICIT_SIMD_OPT")
endif()
endif()
set(${output_var} ${compile_options} PARENT_SCOPE)
endfunction(_get_compile_options_from_flags)
function(_get_compile_options_from_config output_var)
set(config_options "")
if(LIBC_CONF_QSORT_IMPL)
list(APPEND config_options "-DLIBC_QSORT_IMPL=${LIBC_CONF_QSORT_IMPL}")
endif()
if(LIBC_TYPES_TIME_T_IS_32_BIT AND LLVM_LIBC_FULL_BUILD)
list(APPEND config_options "-DLIBC_TYPES_TIME_T_IS_32_BIT")
endif()
if(LIBC_ADD_NULL_CHECKS)
list(APPEND config_options "-DLIBC_ADD_NULL_CHECKS")
endif()
if(NOT "${LIBC_CONF_FREXP_INF_NAN_EXPONENT}" STREQUAL "")
list(APPEND config_options "-DLIBC_FREXP_INF_NAN_EXPONENT=${LIBC_CONF_FREXP_INF_NAN_EXPONENT}")
endif()
if(LIBC_CONF_MATH_OPTIMIZATIONS)
list(APPEND config_options "-DLIBC_MATH=${LIBC_CONF_MATH_OPTIMIZATIONS}")
endif()
if(LIBC_CONF_ERRNO_MODE)
list(APPEND config_options "-DLIBC_ERRNO_MODE=${LIBC_CONF_ERRNO_MODE}")
endif()
set(${output_var} ${config_options} PARENT_SCOPE)
endfunction(_get_compile_options_from_config)
function(_get_common_compile_options output_var flags)
_get_compile_options_from_flags(compile_flags ${flags})
_get_compile_options_from_config(config_flags)
set(compile_options ${LIBC_COMPILE_OPTIONS_DEFAULT} ${compile_flags} ${config_flags})
if(LLVM_LIBC_COMPILER_IS_GCC_COMPATIBLE)
list(APPEND compile_options "-fpie")
if(LLVM_LIBC_FULL_BUILD)
# Only add -ffreestanding flag in non-GPU full build mode.
if(NOT LIBC_TARGET_OS_IS_GPU)
list(APPEND compile_options "-ffreestanding")
endif()
list(APPEND compile_options "-DLIBC_FULL_BUILD")
# Manually disable standard include paths to prevent system headers from
# being included.
if(LIBC_CC_SUPPORTS_NOSTDLIBINC)
list(APPEND compile_options "-nostdlibinc")
elseif(COMPILER_RESOURCE_DIR)
# TODO: We should require COMPILER_RESOURCE_DIR to be set.
list(APPEND compile_options "-isystem${COMPILER_RESOURCE_DIR}/include")
list(APPEND compile_options "-nostdinc")
endif()
# TODO: We should set this unconditionally on Linux.
if(LIBC_TARGET_OS_IS_LINUX AND
(LIBC_CC_SUPPORTS_NOSTDLIBINC OR COMPILER_RESOURCE_DIR))
# We use -idirafter to avoid preempting libc's own headers in case the
# directory (e.g. /usr/include) contains other headers.
if(CMAKE_CROSSCOMPILING)
list(APPEND compile_options "-idirafter=${LIBC_KERNEL_HEADERS}")
else()
list(APPEND compile_options "-idirafter${LIBC_KERNEL_HEADERS}")
endif()
endif()
endif()
if(LIBC_COMPILER_HAS_FIXED_POINT)
list(APPEND compile_options "-ffixed-point")
endif()
if(NOT LIBC_TARGET_OS_IS_GPU)
list(APPEND compile_options "-fno-builtin")
endif()
list(APPEND compile_options "-fno-exceptions")
list(APPEND compile_options "-fno-lax-vector-conversions")
list(APPEND compile_options "-fno-unwind-tables")
list(APPEND compile_options "-fno-asynchronous-unwind-tables")
list(APPEND compile_options "-fno-rtti")
if (LIBC_CC_SUPPORTS_PATTERN_INIT)
list(APPEND compile_options "-ftrivial-auto-var-init=pattern")
endif()
if (LIBC_CONF_KEEP_FRAME_POINTER)
list(APPEND compile_options "-fno-omit-frame-pointer")
if (LIBC_TARGET_ARCHITECTURE_IS_X86_64)
list(APPEND compile_options "-mno-omit-leaf-frame-pointer")
endif()
endif()
if (LIBC_CONF_ENABLE_STACK_PROTECTOR)
list(APPEND compile_options "-fstack-protector-strong")
endif()
list(APPEND compile_options "-Wall")
list(APPEND compile_options "-Wextra")
# -DLIBC_WNO_ERROR=ON if you can't build cleanly with -Werror.
if(NOT LIBC_WNO_ERROR)
list(APPEND compile_options "-Werror")
endif()
list(APPEND compile_options "-Wconversion")
list(APPEND compile_options "-Wno-sign-conversion")
list(APPEND compile_options "-Wdeprecated")
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
# Silence this warning because _Complex is a part of C99.
list(APPEND compile_options "-fext-numeric-literals")
else()
list(APPEND compile_options "-Wno-c99-extensions")
list(APPEND compile_options "-Wno-gnu-imaginary-constant")
endif()
list(APPEND compile_options "-Wno-pedantic")
list(APPEND compile_options "-Wimplicit-fallthrough")
list(APPEND compile_options "-Wwrite-strings")
list(APPEND compile_options "-Wextra-semi")
if(NOT CMAKE_COMPILER_IS_GNUCXX)
list(APPEND compile_options "-Wnewline-eof")
list(APPEND compile_options "-Wnonportable-system-include-path")
list(APPEND compile_options "-Wstrict-prototypes")
list(APPEND compile_options "-Wthread-safety")
list(APPEND compile_options "-Wglobal-constructors")
endif()
elseif(MSVC)
list(APPEND compile_options "/EHs-c-")
list(APPEND compile_options "/GR-")
endif()
if (LIBC_TARGET_OS_IS_GPU)
list(APPEND compile_options "-nogpulib")
list(APPEND compile_options "-fvisibility=hidden")
list(APPEND compile_options "-fconvergent-functions")
list(APPEND compile_options "-flto")
list(APPEND compile_options "-Wno-multi-gpu")
if(LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
list(APPEND compile_options "-Wno-unknown-cuda-version")
list(APPEND compile_options "--cuda-feature=+ptx63")
if(LIBC_CUDA_ROOT)
list(APPEND compile_options "--cuda-path=${LIBC_CUDA_ROOT}")
endif()
elseif(LIBC_TARGET_ARCHITECTURE_IS_AMDGPU)
list(APPEND compile_options "SHELL:-Xclang -mcode-object-version=none")
endif()
endif()
set(${output_var} ${compile_options} PARENT_SCOPE)
endfunction()
|
