1 # Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 # Base compiler configuration. 6 config("compiler") { 7 includes = [ "//" ] 8 if (is_win) { 9 cflags = [ 10 # TODO(brettw) these probably need to be refactored. 11 "/Od", "/WX", "/Zi", "/Gy", "/GS", "/RTC1", "/EHsc", 12 ] 13 } else { 14 cflags = [ 15 # TODO(brettw) obviously this needs to be parameterized. 16 "-arch i386", 17 18 # See http://crbug.com/32204 19 "-fno-strict-aliasing", 20 21 "-fno-threadsafe-statics", 22 "-fstack-protector-all", 23 "-fvisibility=hidden", 24 "-fvisibility-inlines-hidden", 25 ] 26 # !!! Please keep additions sorted alphabetically. 27 28 # TODO(brettw) these should be clang-only. 29 # if (is_clang) { 30 cflags += [ 31 "-fcolor-diagnostics", 32 ] 33 #} 34 35 cflags_c = [ 36 "-std=c99", 37 ] 38 39 cflags_cc = [ 40 "-fno-exceptions", 41 "-std=gnu++11", 42 ] 43 } 44 45 if (is_mac) { 46 # These are used for both compiler and linker flags on Mac. 47 common_mac_flags = [ 48 # TODO(brettw) obviously this needs to be parameterized. 49 "-arch i386", 50 51 # Set which SDK to use. 52 # TODO(brettw) this needs to be configurable somehow. 53 "-isysroot", "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk", 54 55 "-mmacosx-version-min=10.6", 56 ] 57 58 # Mac compiler flags. 59 cflags += [ 60 # Without this, the constructors and destructors of a C++ object inside 61 # an Objective C struct won't be called, which is very bad. 62 "-fobjc-call-cxx-cdtors", 63 ] 64 cflags += common_mac_flags 65 66 # Mac linker flags. 67 ldflags = [ 68 "-L.", 69 70 # TODO(brettW) I don't understand these options. 71 "-Wl,-rpath,@loader_path/.", 72 "-Wl,-rpath,@loader_path/../../..", 73 ] 74 ldflags += common_mac_flags 75 } 76 } 77 78 # runtime_library ------------------------------------------------------------- 79 # 80 # Sets the runtime library and associated options. 81 # 82 # We don't bother making multiple versions that are toggle-able since there 83 # is more than one axis of control (which makes it complicated) and there's 84 # no practical reason for anybody to change this since the CRT must agree. 85 86 config("runtime_library") { 87 if (is_component_build) { 88 # Component mode: dynamic CRT. 89 defines = [ "COMPONENT_BUILD" ] 90 if (is_win) { 91 # Since the library is shared, it requires exceptions or will give errors 92 # about things not matching, so keep exceptions on. 93 if (is_debug) { 94 cflags = [ "/MDd" ] 95 } else { 96 cflags = [ "/MD" ] 97 } 98 } 99 } else { 100 # Static CRT. 101 if (is_win) { 102 # We don't use exceptions, and when we link statically we can just get 103 # rid of them entirely. 104 defines = [ "_HAS_EXCEPTIONS=0" ] 105 if (is_debug) { 106 cflags = [ "/MTd" ] 107 } else { 108 cflags = [ "/MT" ] 109 } 110 } 111 } 112 113 if (is_win) { 114 defines += [ 115 "__STD_C", 116 "__STDC_CONSTANT_MACROS", 117 "__STDC_FORMAT_MACROS", 118 "_CRT_RAND_S", 119 "_CRT_SECURE_NO_DEPRECATE", 120 "_SCL_SECURE_NO_DEPRECATE", 121 "_UNICODE", 122 "UNICODE", 123 ] 124 } 125 } 126 127 # chromium_code --------------------------------------------------------------- 128 # 129 # Toggles between higher and lower warnings for code that is (or isn't) 130 # part of Chromium. 131 132 config("chromium_code") { 133 if (is_win) { 134 cflags = [ 135 "/W4", # Warning level 4. 136 ] 137 } else if (is_mac) { 138 cflags = [ 139 "-Wall", 140 "-Werror", 141 "-Wextra", 142 ] 143 } 144 } 145 config("no_chromium_code") { 146 if (is_win) { 147 cflags = [ 148 "/W3", # Warning level 3. 149 "/wd4800", # Disable warning when forcing value to bool. 150 ] 151 defines = [ 152 "_CRT_NONSTDC_NO_WARNINGS", 153 "_CRT_NONSTDC_NO_DEPRECATE", 154 ] 155 } 156 } 157 158 # rtti ------------------------------------------------------------------------ 159 # 160 # Allows turning Run-Time Type Identification on or off. 161 162 config("rtti") { 163 if (is_win) { 164 cflags_cc = [ "/GR" ] 165 } 166 } 167 config("no_rtti") { 168 if (is_win) { 169 cflags_cc = [ "/GR-" ] 170 } else { 171 cflags_cc = [ "-fno-rtti" ] 172 } 173 } 174 175 # Warnings --------------------------------------------------------------------- 176 177 config("default_warnings") { 178 if (is_win) { 179 # Please keep ordered and add names if you add more. 180 cflags = [ 181 "/wd4018", # Comparing signed and unsigned values. 182 "/wd4100", # Unreferenced formal function parameter. 183 "/wd4121", # Alignment of a member was sensitive to packing. 184 "/wd4125", # Decimal digit terminates octal escape sequence. 185 "/wd4127", # Conditional expression is constant. 186 "/wd4130", # Logical operation on address of string constant. 187 # TODO(brettw) is this necessary? If so, it should probably be on whoever 188 # is silly enough to be doing this rather than globally. 189 #"/wd4131", # Function uses old-style declarator. 190 "/wd4189", # A variable was declared and initialized but never used. 191 "/wd4201", # Nonstandard extension used: nameless struct/union. 192 "/wd4238", # Nonstandard extension used: class rvalue used as lvalue. 193 "/wd4244", # Conversion: possible loss of data. 194 "/wd4245", # Conversion: signed/unsigned mismatch, 195 "/wd4251", # Class needs to have dll-interface. 196 "/wd4310", # Cast truncates constant value. 197 "/wd4351", # Elements of array will be default initialized. 198 "/wd4355", # 'this' used in base member initializer list. 199 "/wd4396", # Inline friend template thing. 200 "/wd4428", # Universal character name encountered in source. 201 "/wd4481", # Nonstandard extension: override specifier. 202 "/wd4503", # Decorated name length exceeded, name was truncated. 203 "/wd4505", # Unreferenced local function has been removed. 204 "/wd4510", # Default constructor could not be generated. 205 "/wd4512", # Assignment operator could not be generated. 206 "/wd4530", # Exception handler used, but unwind semantics not enabled. 207 "/wd4610", # Class can never be instantiated, constructor required. 208 "/wd4611", # C++ object destruction and 'catch'. 209 "/wd4701", # Potentially uninitialized local variable name used. 210 "/wd4702", # Unreachable code. 211 "/wd4706", # Assignment within conditional expression. 212 "/wd4819", # Character not in the current code page. 213 ] 214 } 215 216 # TODO(brettw) this should probably be if(clang). 217 if (is_mac) { 218 cflags = [ 219 # Warn for weird old-style text after an #endif. 220 "-Wendif-labels", 221 222 "-Wnewline-eof", 223 224 # Don't warn about the "struct foo f = {0};" initialization pattern. 225 "-Wno-missing-field-initializers", 226 227 # Don't warn about unused function parameters. 228 "-Wno-unused-parameter", 229 ] 230 231 # TODO(brettw) Ones below here should be clang-only when we have a flag 232 # for it. 233 #if (is_clang) { 234 cflags += [ 235 "-Wheader-hygiene", 236 237 # This warns on using ints as initializers for floats in 238 # initializer lists (e.g. |int a = f(); CGSize s = { a, a };|), 239 # which happens in several places in chrome code. Not sure if 240 # this is worth fixing. 241 "-Wno-c++11-narrowing", 242 243 # Don't die on dtoa code that uses a char as an array index. 244 # This is required solely for base/third_party/dmg_fp/dtoa.cc. 245 # TODO(brettw) move this to that project then! 246 "-Wno-char-subscripts", 247 248 # Warns on switches on enums that cover all enum values but 249 # also contain a default: branch. Chrome is full of that. 250 "-Wno-covered-switch-default", 251 252 # Clang considers the `register` keyword as deprecated, but e.g. 253 # code generated by flex (used in angle) contains that keyword. 254 # http://crbug.com/255186 255 "-Wno-deprecated-register", 256 257 # Clang spots more unused functions. 258 "-Wno-unused-function", 259 260 # Warns when a const char[] is converted to bool. 261 "-Wstring-conversion", 262 ] 263 #} #is_clang 264 } 265 } 266
