Abseil Common Libraries (C++) (grcp 依赖)
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216 lines
7.0 KiB
216 lines
7.0 KiB
"""Abseil compiler options. |
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This is the source of truth for Abseil compiler options. To modify Abseil |
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compilation options: |
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(1) Edit the appropriate list in this file based on the platform the flag is |
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needed on. |
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(2) Run `<path_to_absl>/copts/generate_copts.py`. |
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The generated copts are consumed by configure_copts.bzl and |
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AbseilConfigureCopts.cmake. |
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""" |
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# /Wall with msvc includes unhelpful warnings such as C4711, C4710, ... |
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MSVC_BIG_WARNING_FLAGS = [ |
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"/W3", |
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] |
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LLVM_BIG_WARNING_FLAGS = [ |
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"-Wall", |
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"-Wextra", |
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"-Weverything", |
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] |
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# Docs on single flags is preceded by a comment. |
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# Docs on groups of flags is preceded by ###. |
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LLVM_DISABLE_WARNINGS_FLAGS = [ |
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# Abseil does not support C++98 |
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"-Wno-c++98-compat-pedantic", |
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# Turns off all implicit conversion warnings. Most are re-enabled below. |
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"-Wno-conversion", |
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"-Wno-covered-switch-default", |
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"-Wno-deprecated", |
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"-Wno-disabled-macro-expansion", |
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"-Wno-double-promotion", |
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### |
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# Turned off as they include valid C++ code. |
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"-Wno-comma", |
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"-Wno-extra-semi", |
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"-Wno-extra-semi-stmt", |
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"-Wno-packed", |
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"-Wno-padded", |
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### |
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# Google style does not use unsigned integers, though STL containers |
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# have unsigned types. |
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"-Wno-sign-compare", |
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### |
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"-Wno-float-conversion", |
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"-Wno-float-equal", |
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"-Wno-format-nonliteral", |
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# Too aggressive: warns on Clang extensions enclosed in Clang-only |
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# compilation paths. |
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"-Wno-gcc-compat", |
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### |
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# Some internal globals are necessary. Don't do this at home. |
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"-Wno-global-constructors", |
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"-Wno-exit-time-destructors", |
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### |
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"-Wno-nested-anon-types", |
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"-Wno-non-modular-include-in-module", |
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"-Wno-old-style-cast", |
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# Warns on preferred usage of non-POD types such as string_view |
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"-Wno-range-loop-analysis", |
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"-Wno-reserved-id-macro", |
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"-Wno-shorten-64-to-32", |
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"-Wno-switch-enum", |
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"-Wno-thread-safety-negative", |
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"-Wno-unknown-warning-option", |
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"-Wno-unreachable-code", |
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# Causes warnings on include guards |
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"-Wno-unused-macros", |
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"-Wno-weak-vtables", |
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# Causes warnings on usage of types/compare.h comparison operators. |
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"-Wno-zero-as-null-pointer-constant", |
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### |
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# Implicit conversion warnings turned off by -Wno-conversion |
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# which are re-enabled below. |
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"-Wbitfield-enum-conversion", |
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"-Wbool-conversion", |
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"-Wconstant-conversion", |
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"-Wenum-conversion", |
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"-Wint-conversion", |
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"-Wliteral-conversion", |
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"-Wnon-literal-null-conversion", |
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"-Wnull-conversion", |
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"-Wobjc-literal-conversion", |
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"-Wno-sign-conversion", |
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"-Wstring-conversion", |
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] |
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LLVM_TEST_DISABLE_WARNINGS_FLAGS = [ |
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"-Wno-c99-extensions", |
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"-Wno-deprecated-declarations", |
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"-Wno-missing-noreturn", |
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"-Wno-missing-prototypes", |
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"-Wno-missing-variable-declarations", |
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"-Wno-null-conversion", |
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"-Wno-shadow", |
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"-Wno-shift-sign-overflow", |
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"-Wno-sign-compare", |
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"-Wno-unused-function", |
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"-Wno-unused-member-function", |
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"-Wno-unused-parameter", |
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"-Wno-unused-private-field", |
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"-Wno-unused-template", |
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"-Wno-used-but-marked-unused", |
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"-Wno-zero-as-null-pointer-constant", |
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# For a libc++ bug fixed in r357267 |
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"-Wno-gnu-include-next", |
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# gtest depends on this GNU extension being offered. |
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"-Wno-gnu-zero-variadic-macro-arguments", |
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] |
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MSVC_STYLE_EXCEPTIONS_FLAGS = [ |
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"/U_HAS_EXCEPTIONS", |
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"/D_HAS_EXCEPTIONS=1", |
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"/EHsc" |
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] |
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MSVC_DEFINES = [ |
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"/DNOMINMAX", # Don't define min and max macros (windows.h) |
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# Don't bloat namespace with incompatible winsock versions. |
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"/DWIN32_LEAN_AND_MEAN", |
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# Don't warn about usage of insecure C functions. |
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"/D_CRT_SECURE_NO_WARNINGS", |
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"/D_SCL_SECURE_NO_WARNINGS", |
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# Introduced in VS 2017 15.8, allow overaligned types in aligned_storage |
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"/D_ENABLE_EXTENDED_ALIGNED_STORAGE", |
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] |
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COPT_VARS = { |
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"ABSL_GCC_FLAGS": [ |
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"-Wall", |
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"-Wextra", |
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"-Wcast-qual", |
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"-Wconversion-null", |
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"-Wmissing-declarations", |
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"-Woverlength-strings", |
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"-Wpointer-arith", |
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"-Wunused-local-typedefs", |
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"-Wunused-result", |
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"-Wvarargs", |
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"-Wvla", # variable-length array |
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"-Wwrite-strings", |
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# gcc-4.x has spurious missing field initializer warnings. |
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36750 |
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# Remove when gcc-4.x is no longer supported. |
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"-Wno-missing-field-initializers", |
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# Google style does not use unsigned integers, though STL containers |
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# have unsigned types. |
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"-Wno-sign-compare", |
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], |
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"ABSL_GCC_TEST_FLAGS": [ |
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"-Wno-conversion-null", |
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"-Wno-deprecated-declarations", |
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"-Wno-missing-declarations", |
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"-Wno-sign-compare", |
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"-Wno-unused-function", |
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"-Wno-unused-parameter", |
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"-Wno-unused-private-field", |
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], |
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"ABSL_GCC_EXCEPTIONS_FLAGS": ["-fexceptions"], |
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"ABSL_LLVM_FLAGS": |
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LLVM_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS, |
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"ABSL_LLVM_TEST_FLAGS": |
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LLVM_TEST_DISABLE_WARNINGS_FLAGS, |
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"ABSL_LLVM_EXCEPTIONS_FLAGS": ["-fexceptions"], |
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"ABSL_CLANG_CL_FLAGS": |
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(MSVC_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS + MSVC_DEFINES), |
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"ABSL_CLANG_CL_TEST_FLAGS": |
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LLVM_TEST_DISABLE_WARNINGS_FLAGS, |
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"ABSL_CLANG_CL_EXCEPTIONS_FLAGS": |
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MSVC_STYLE_EXCEPTIONS_FLAGS, |
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"ABSL_MSVC_FLAGS": |
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MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [ |
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"/wd4005", # macro-redefinition |
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"/wd4068", # unknown pragma |
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# qualifier applied to function type has no meaning; ignored |
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"/wd4180", |
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# conversion from 'type1' to 'type2', possible loss of data |
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"/wd4244", |
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# conversion from 'size_t' to 'type', possible loss of data |
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"/wd4267", |
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# The decorated name was longer than the compiler limit |
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"/wd4503", |
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# forcing value to bool 'true' or 'false' (performance warning) |
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"/wd4800", |
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], |
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"ABSL_MSVC_TEST_FLAGS": [ |
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"/wd4018", # signed/unsigned mismatch |
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"/wd4101", # unreferenced local variable |
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"/wd4503", # decorated name length exceeded, name was truncated |
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"/wd4996", # use of deprecated symbol |
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"/DNOMINMAX", # disable the min() and max() macros from <windows.h> |
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], |
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"ABSL_MSVC_EXCEPTIONS_FLAGS": |
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MSVC_STYLE_EXCEPTIONS_FLAGS, |
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"ABSL_MSVC_LINKOPTS": [ |
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# Object file doesn't export any previously undefined symbols |
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"-ignore:4221", |
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], |
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# "HWAES" is an abbreviation for "hardware AES" (AES - Advanced Encryption |
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# Standard). These flags are used for detecting whether or not the target |
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# architecture has hardware support for AES instructions which can be used |
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# to improve performance of some random bit generators. |
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"ABSL_RANDOM_HWAES_ARM64_FLAGS": ["-march=armv8-a+crypto"], |
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"ABSL_RANDOM_HWAES_ARM32_FLAGS": ["-mfpu=neon"], |
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"ABSL_RANDOM_HWAES_X64_FLAGS": [ |
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"-maes", |
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"-msse4.1", |
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], |
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"ABSL_RANDOM_HWAES_MSVC_X64_FLAGS": [ |
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"/O2", # Maximize speed |
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"/Ob2", # Aggressive inlining |
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], |
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}
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