copts.py (5837B)
1 """Abseil compiler options. 2 3 This is the source of truth for Abseil compiler options. To modify Abseil 4 compilation options: 5 6 (1) Edit the appropriate list in this file based on the platform the flag is 7 needed on. 8 (2) Run `<path_to_absl>/copts/generate_copts.py`. 9 10 The generated copts are consumed by configure_copts.bzl and 11 AbseilConfigureCopts.cmake. 12 """ 13 14 ABSL_GCC_FLAGS = [ 15 "-Wall", 16 "-Wextra", 17 "-Wcast-qual", 18 "-Wconversion-null", 19 "-Wformat-security", 20 "-Wmissing-declarations", 21 "-Wnon-virtual-dtor", 22 "-Woverlength-strings", 23 "-Wpointer-arith", 24 "-Wundef", 25 "-Wunused-local-typedefs", 26 "-Wunused-result", 27 "-Wvarargs", 28 "-Wvla", # variable-length array 29 "-Wwrite-strings", 30 # Don't define min and max macros (Build on Windows using gcc) 31 "-DNOMINMAX", 32 ] 33 34 ABSL_GCC_TEST_ADDITIONAL_FLAGS = [ 35 "-Wno-deprecated-declarations", 36 "-Wno-missing-declarations", 37 "-Wno-self-move", 38 "-Wno-sign-compare", 39 "-Wno-unused-function", 40 "-Wno-unused-parameter", 41 "-Wno-unused-private-field", 42 ] 43 44 ABSL_LLVM_FLAGS = [ 45 "-Wall", 46 "-Wextra", 47 "-Wc++98-compat-extra-semi", 48 "-Wcast-qual", 49 "-Wconversion", 50 "-Wdeprecated-pragma", 51 "-Wfloat-overflow-conversion", 52 "-Wfloat-zero-conversion", 53 "-Wfor-loop-analysis", 54 "-Wformat-security", 55 "-Wgnu-redeclared-enum", 56 "-Winfinite-recursion", 57 "-Winvalid-constexpr", 58 "-Wliteral-conversion", 59 "-Wmissing-declarations", 60 "-Wnullability-completeness", 61 "-Woverlength-strings", 62 "-Wpointer-arith", 63 "-Wself-assign", 64 "-Wshadow-all", 65 "-Wshorten-64-to-32", 66 "-Wsign-conversion", 67 "-Wstring-conversion", 68 "-Wtautological-overlap-compare", 69 "-Wtautological-unsigned-zero-compare", 70 "-Wthread-safety", 71 "-Wundef", 72 "-Wuninitialized", 73 "-Wunreachable-code", 74 "-Wunused-comparison", 75 "-Wunused-local-typedefs", 76 "-Wunused-result", 77 "-Wvla", 78 "-Wwrite-strings", 79 # Warnings that are enabled by group warning flags like -Wall that we 80 # explicitly disable. 81 "-Wno-float-conversion", 82 "-Wno-implicit-float-conversion", 83 "-Wno-implicit-int-float-conversion", 84 # Disable warnings on unknown warning flags (when warning flags are 85 # unknown on older compiler versions) 86 "-Wno-unknown-warning-option", 87 # Don't define min and max macros (Build on Windows using clang) 88 "-DNOMINMAX", 89 ] 90 91 ABSL_LLVM_TEST_ADDITIONAL_FLAGS = [ 92 "-Wno-deprecated-declarations", 93 "-Wno-implicit-int-conversion", 94 "-Wno-missing-prototypes", 95 "-Wno-missing-variable-declarations", 96 "-Wno-shadow", 97 "-Wno-shorten-64-to-32", 98 "-Wno-sign-compare", 99 "-Wno-sign-conversion", 100 "-Wno-unreachable-code-loop-increment", 101 "-Wno-unused-function", 102 "-Wno-unused-member-function", 103 "-Wno-unused-parameter", 104 "-Wno-unused-private-field", 105 "-Wno-unused-template", 106 "-Wno-used-but-marked-unused", 107 # gtest depends on this GNU extension being offered. 108 "-Wno-gnu-zero-variadic-macro-arguments", 109 ] 110 111 # /Wall with msvc includes unhelpful warnings such as C4711, C4710, ... 112 MSVC_BIG_WARNING_FLAGS = [ 113 "/W3", 114 ] 115 116 MSVC_WARNING_FLAGS = [ 117 # Increase the number of sections available in object files 118 "/bigobj", 119 "/wd4005", # macro-redefinition 120 "/wd4068", # unknown pragma 121 # qualifier applied to function type has no meaning; ignored 122 "/wd4180", 123 # The decorated name was longer than the compiler limit 124 "/wd4503", 125 # forcing value to bool 'true' or 'false' (performance warning) 126 "/wd4800", 127 ] 128 129 MSVC_DEFINES = [ 130 "/DNOMINMAX", # Don't define min and max macros (windows.h) 131 # Don't bloat namespace with incompatible winsock versions. 132 "/DWIN32_LEAN_AND_MEAN", 133 # Don't warn about usage of insecure C functions. 134 "/D_CRT_SECURE_NO_WARNINGS", 135 "/D_SCL_SECURE_NO_WARNINGS", 136 # Introduced in VS 2017 15.8, allow overaligned types in aligned_storage 137 "/D_ENABLE_EXTENDED_ALIGNED_STORAGE", 138 ] 139 140 141 def GccStyleFilterAndCombine(default_flags, test_flags): 142 """Merges default_flags and test_flags for GCC and LLVM. 143 144 Args: 145 default_flags: A list of default compiler flags 146 test_flags: A list of flags that are only used in tests 147 148 Returns: 149 A combined list of default_flags and test_flags, but with all flags of the 150 form '-Wwarning' removed if test_flags contains a flag of the form 151 '-Wno-warning' 152 """ 153 remove = set(["-W" + f[5:] for f in test_flags if f[:5] == "-Wno-"]) 154 return [f for f in default_flags if f not in remove] + test_flags 155 156 COPT_VARS = { 157 "ABSL_GCC_FLAGS": ABSL_GCC_FLAGS, 158 "ABSL_GCC_TEST_FLAGS": GccStyleFilterAndCombine( 159 ABSL_GCC_FLAGS, ABSL_GCC_TEST_ADDITIONAL_FLAGS 160 ), 161 "ABSL_LLVM_FLAGS": ABSL_LLVM_FLAGS, 162 "ABSL_LLVM_TEST_FLAGS": GccStyleFilterAndCombine( 163 ABSL_LLVM_FLAGS, ABSL_LLVM_TEST_ADDITIONAL_FLAGS 164 ), 165 "ABSL_CLANG_CL_FLAGS": MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES, 166 "ABSL_CLANG_CL_TEST_FLAGS": ( 167 MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + ABSL_LLVM_TEST_ADDITIONAL_FLAGS 168 ), 169 "ABSL_MSVC_FLAGS": ( 170 MSVC_BIG_WARNING_FLAGS + MSVC_WARNING_FLAGS + MSVC_DEFINES 171 ), 172 "ABSL_MSVC_TEST_FLAGS": ( 173 MSVC_BIG_WARNING_FLAGS 174 + MSVC_WARNING_FLAGS 175 + MSVC_DEFINES 176 + [ 177 "/wd4018", # signed/unsigned mismatch 178 "/wd4101", # unreferenced local variable 179 "/wd4244", # shortening conversion 180 "/wd4267", # shortening conversion 181 "/wd4503", # decorated name length exceeded, name was truncated 182 "/wd4996", # use of deprecated symbol 183 "/DNOMINMAX", # disable the min() and max() macros from <windows.h> 184 ] 185 ), 186 "ABSL_MSVC_LINKOPTS": [ 187 # Object file doesn't export any previously undefined symbols 188 "-ignore:4221", 189 ], 190 }