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+"""absl specific copts.
+
+Flags specified here must not impact ABI. Code compiled with and without these
+opts will be linked together, and in some cases headers compiled with and
+without these options will be part of the same program.
+"""
+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_TEST_FLAGS = [
+ "-Wno-conversion-null",
+ "-Wno-missing-declarations",
+ "-Wno-sign-compare",
+ "-Wno-unused-function",
+ "-Wno-unused-parameter",
+ "-Wno-unused-private-field",
+]
+
+LLVM_FLAGS = [
+ "-Wall",
+ "-Wextra",
+ "-Weverything",
+ "-Wno-c++98-compat-pedantic",
+ "-Wno-comma",
+ "-Wno-conversion",
+ "-Wno-disabled-macro-expansion",
+ "-Wno-documentation",
+ "-Wno-documentation-unknown-command",
+ "-Wno-double-promotion",
+ "-Wno-exit-time-destructors",
+ "-Wno-extra-semi",
+ "-Wno-float-conversion",
+ "-Wno-float-equal",
+ "-Wno-format-nonliteral",
+ "-Wno-gcc-compat",
+ "-Wno-global-constructors",
+ "-Wno-google3-inheriting-constructor",
+ "-Wno-google3-lambda-expression",
+ "-Wno-google3-rvalue-reference",
+ "-Wno-google3-trailing-return-type",
+ "-Wno-nested-anon-types",
+ "-Wno-non-modular-include-in-module",
+ "-Wno-old-style-cast",
+ "-Wno-packed",
+ "-Wno-padded",
+ "-Wno-range-loop-analysis",
+ "-Wno-reserved-id-macro",
+ "-Wno-shorten-64-to-32",
+ "-Wno-sign-conversion",
+ "-Wno-switch-enum",
+ "-Wno-thread-safety-negative",
+ "-Wno-undef",
+ "-Wno-unused-macros",
+ "-Wno-weak-vtables",
+ # flags below are also controled by -Wconversion which is disabled
+ "-Wbitfield-enum-conversion",
+ "-Wbool-conversion",
+ "-Wconstant-conversion",
+ "-Wenum-conversion",
+ "-Wint-conversion",
+ "-Wliteral-conversion",
+ "-Wnon-literal-null-conversion",
+ "-Wnull-conversion",
+ "-Wobjc-literal-conversion",
+ "-Wstring-conversion",
+]
+
+LLVM_TEST_FLAGS = [
+ "-Wno-c99-extensions",
+ "-Wno-missing-noreturn",
+ "-Wno-missing-prototypes",
+ "-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",
+]
+
+MSVC_FLAGS = [
+ "/W3",
+ "/WX",
+ "/wd4005", # macro-redifinition
+ "/wd4068", # unknown pragma
+ "/wd4244", # conversion from 'type1' to 'type2', possible loss of data
+ "/wd4267", # conversion from 'size_t' to 'type', possible loss of data
+ "/wd4800", # forcing value to bool 'true' or 'false' (performance warning)
+ "/DWIN32_LEAN_AND_MEAN", # Don't bloat namespace with incompatible winsock versions.
+]
+
+MSVC_TEST_FLAGS = [
+ "/wd4018", # signed/unsigned mismatch
+ "/wd4101", # unreferenced local variable
+ "/wd4503", # decorated name length exceeded, name was truncated
+]
+
+def _qualify_flags(scope, flags):
+ return [scope + x for x in flags]
+
+HYBRID_FLAGS = _qualify_flags("-Xgcc-only=", GCC_FLAGS) + _qualify_flags("-Xclang-only=", LLVM_FLAGS)
+HYBRID_TEST_FLAGS = _qualify_flags("-Xgcc-only=", GCC_TEST_FLAGS) + _qualify_flags("-Xclang-only=", LLVM_TEST_FLAGS)
+
+# /Wall with msvc includes unhelpful warnings such as C4711, C4710, ...
+ABSL_DEFAULT_COPTS = select({
+ "//absl:windows": MSVC_FLAGS,
+ "//absl:llvm_warnings": LLVM_FLAGS,
+ "//conditions:default": GCC_FLAGS,
+})
+
+# in absence of modules (--compiler=gcc or -c opt), cc_tests leak their copts
+# to their (included header) dependencies and fail to build outside absl
+ABSL_TEST_COPTS = ABSL_DEFAULT_COPTS + select({
+ "//absl:windows": MSVC_TEST_FLAGS,
+ "//absl:llvm_warnings": LLVM_TEST_FLAGS,
+ "//conditions:default": GCC_TEST_FLAGS,
+})
+
+ABSL_EXCEPTIONS_FLAG = select({
+ "//absl:windows": ["/U_HAS_EXCEPTIONS", "/D_HAS_EXCEPTIONS=1", "/EHsc"],
+ "//conditions:default": ["-fexceptions"],
+})