| """Abseil compiler options. |
| |
| This is the source of truth for Abseil compiler options. To modify Abseil |
| compilation options: |
| |
| (1) Edit the appropriate list in this file based on the platform the flag is |
| needed on. |
| (2) Run `<path_to_absl>/copts/generate_copts.py`. |
| |
| The generated copts are consumed by configure_copts.bzl and |
| AbseilConfigureCopts.cmake. |
| """ |
| |
| # /Wall with msvc includes unhelpful warnings such as C4711, C4710, ... |
| MSVC_BIG_WARNING_FLAGS = [ |
| "/W3", |
| ] |
| |
| LLVM_BIG_WARNING_FLAGS = [ |
| "-Wall", |
| "-Wextra", |
| "-Weverything", |
| ] |
| |
| # Docs on single flags is preceded by a comment. |
| # Docs on groups of flags is preceded by ###. |
| LLVM_DISABLE_WARNINGS_FLAGS = [ |
| # Abseil does not support C++98 |
| "-Wno-c++98-compat-pedantic", |
| # Turns off all implicit conversion warnings. Most are re-enabled below. |
| "-Wno-conversion", |
| "-Wno-covered-switch-default", |
| "-Wno-deprecated", |
| "-Wno-disabled-macro-expansion", |
| "-Wno-double-promotion", |
| ### |
| # Turned off as they include valid C++ code. |
| "-Wno-comma", |
| "-Wno-extra-semi", |
| "-Wno-extra-semi-stmt", |
| "-Wno-packed", |
| "-Wno-padded", |
| ### |
| # Google style does not use unsigned integers, though STL containers |
| # have unsigned types. |
| "-Wno-sign-compare", |
| ### |
| "-Wno-float-conversion", |
| "-Wno-float-equal", |
| "-Wno-format-nonliteral", |
| # Too aggressive: warns on Clang extensions enclosed in Clang-only |
| # compilation paths. |
| "-Wno-gcc-compat", |
| ### |
| # Some internal globals are necessary. Don't do this at home. |
| "-Wno-global-constructors", |
| "-Wno-exit-time-destructors", |
| ### |
| "-Wno-non-modular-include-in-module", |
| "-Wno-old-style-cast", |
| # Warns on preferred usage of non-POD types such as string_view |
| "-Wno-range-loop-analysis", |
| "-Wno-reserved-id-macro", |
| "-Wno-shorten-64-to-32", |
| "-Wno-switch-enum", |
| "-Wno-thread-safety-negative", |
| "-Wno-unknown-warning-option", |
| "-Wno-unreachable-code", |
| # Causes warnings on include guards |
| "-Wno-unused-macros", |
| "-Wno-weak-vtables", |
| # Causes warnings on usage of types/compare.h comparison operators. |
| "-Wno-zero-as-null-pointer-constant", |
| ### |
| # Implicit conversion warnings turned off by -Wno-conversion |
| # which are re-enabled below. |
| "-Wbitfield-enum-conversion", |
| "-Wbool-conversion", |
| "-Wconstant-conversion", |
| "-Wenum-conversion", |
| "-Wint-conversion", |
| "-Wliteral-conversion", |
| "-Wnon-literal-null-conversion", |
| "-Wnull-conversion", |
| "-Wobjc-literal-conversion", |
| "-Wno-sign-conversion", |
| "-Wstring-conversion", |
| ] |
| |
| LLVM_TEST_DISABLE_WARNINGS_FLAGS = [ |
| "-Wno-c99-extensions", |
| "-Wno-deprecated-declarations", |
| "-Wno-missing-noreturn", |
| "-Wno-missing-prototypes", |
| "-Wno-missing-variable-declarations", |
| "-Wno-null-conversion", |
| "-Wno-shadow", |
| "-Wno-shift-sign-overflow", |
| "-Wno-sign-compare", |
| "-Wno-unused-function", |
| "-Wno-unused-member-function", |
| "-Wno-unused-parameter", |
| "-Wno-unused-private-field", |
| "-Wno-unused-template", |
| "-Wno-used-but-marked-unused", |
| "-Wno-zero-as-null-pointer-constant", |
| # gtest depends on this GNU extension being offered. |
| "-Wno-gnu-zero-variadic-macro-arguments", |
| ] |
| |
| MSVC_DEFINES = [ |
| "/DNOMINMAX", # Don't define min and max macros (windows.h) |
| # Don't bloat namespace with incompatible winsock versions. |
| "/DWIN32_LEAN_AND_MEAN", |
| # Don't warn about usage of insecure C functions. |
| "/D_CRT_SECURE_NO_WARNINGS", |
| "/D_SCL_SECURE_NO_WARNINGS", |
| # Introduced in VS 2017 15.8, allow overaligned types in aligned_storage |
| "/D_ENABLE_EXTENDED_ALIGNED_STORAGE", |
| ] |
| |
| COPT_VARS = { |
| "ABSL_GCC_FLAGS": [ |
| "-Wall", |
| "-Wextra", |
| "-Wcast-qual", |
| "-Wconversion-null", |
| "-Wmissing-declarations", |
| "-Woverlength-strings", |
| "-Wpointer-arith", |
| "-Wunused-local-typedefs", |
| "-Wunused-result", |
| "-Wvarargs", |
| "-Wvla", # variable-length array |
| "-Wwrite-strings", |
| # gcc-4.x has spurious missing field initializer warnings. |
| # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36750 |
| # Remove when gcc-4.x is no longer supported. |
| "-Wno-missing-field-initializers", |
| # Google style does not use unsigned integers, though STL containers |
| # have unsigned types. |
| "-Wno-sign-compare", |
| ], |
| "ABSL_GCC_TEST_FLAGS": [ |
| "-Wno-conversion-null", |
| "-Wno-deprecated-declarations", |
| "-Wno-missing-declarations", |
| "-Wno-sign-compare", |
| "-Wno-unused-function", |
| "-Wno-unused-parameter", |
| "-Wno-unused-private-field", |
| ], |
| "ABSL_LLVM_FLAGS": |
| LLVM_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS, |
| "ABSL_LLVM_TEST_FLAGS": |
| LLVM_TEST_DISABLE_WARNINGS_FLAGS, |
| "ABSL_CLANG_CL_FLAGS": |
| (MSVC_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS + MSVC_DEFINES), |
| "ABSL_CLANG_CL_TEST_FLAGS": |
| LLVM_TEST_DISABLE_WARNINGS_FLAGS, |
| "ABSL_MSVC_FLAGS": |
| MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [ |
| # Increase the number of sections available in object files |
| "/bigobj", |
| "/wd4005", # macro-redefinition |
| "/wd4068", # unknown pragma |
| # qualifier applied to function type has no meaning; ignored |
| "/wd4180", |
| # conversion from 'type1' to 'type2', possible loss of data |
| "/wd4244", |
| # conversion from 'size_t' to 'type', possible loss of data |
| "/wd4267", |
| # The decorated name was longer than the compiler limit |
| "/wd4503", |
| # forcing value to bool 'true' or 'false' (performance warning) |
| "/wd4800", |
| ], |
| "ABSL_MSVC_TEST_FLAGS": [ |
| "/wd4018", # signed/unsigned mismatch |
| "/wd4101", # unreferenced local variable |
| "/wd4503", # decorated name length exceeded, name was truncated |
| "/wd4996", # use of deprecated symbol |
| "/DNOMINMAX", # disable the min() and max() macros from <windows.h> |
| ], |
| "ABSL_MSVC_LINKOPTS": [ |
| # Object file doesn't export any previously undefined symbols |
| "-ignore:4221", |
| ], |
| # "HWAES" is an abbreviation for "hardware AES" (AES - Advanced Encryption |
| # Standard). These flags are used for detecting whether or not the target |
| # architecture has hardware support for AES instructions which can be used |
| # to improve performance of some random bit generators. |
| "ABSL_RANDOM_HWAES_ARM64_FLAGS": ["-march=armv8-a+crypto"], |
| "ABSL_RANDOM_HWAES_ARM32_FLAGS": ["-mfpu=neon"], |
| "ABSL_RANDOM_HWAES_X64_FLAGS": [ |
| "-maes", |
| "-msse4.1", |
| ], |
| "ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [], |
| } |