diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/copts/copts.py')
| -rw-r--r-- | third_party/abseil_cpp/absl/copts/copts.py | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/copts/copts.py b/third_party/abseil_cpp/absl/copts/copts.py new file mode 100644 index 0000000000..704ef23450 --- /dev/null +++ b/third_party/abseil_cpp/absl/copts/copts.py @@ -0,0 +1,200 @@ +"""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": [], +} |