merge(3p/absl): subtree merge of Abseil up to e19260f r/1889

... notably, this includes Abseil's own StatusOr type, which
conflicted with our implementation (that was taken from TensorFlow).

Change-Id: Ie7d6764b64055caaeb8dc7b6b9d066291e6b538f

1 files changed, 31 insertions, 82 deletions

diff --git a/third_party/abseil_cpp/absl/copts/GENERATED_copts.bzl b/third_party/abseil_cpp/absl/copts/GENERATED_copts.bzl
index 3cc487845c64..6707488f23db 100644
--- a/third_party/abseil_cpp/absl/copts/GENERATED_copts.bzl
+++ b/third_party/abseil_cpp/absl/copts/GENERATED_copts.bzl
@@ -6,47 +6,6 @@
 
 ABSL_CLANG_CL_FLAGS = [
     "/W3",
-    "-Wno-c++98-compat-pedantic",
-    "-Wno-conversion",
-    "-Wno-covered-switch-default",
-    "-Wno-deprecated",
-    "-Wno-disabled-macro-expansion",
-    "-Wno-double-promotion",
-    "-Wno-comma",
-    "-Wno-extra-semi",
-    "-Wno-extra-semi-stmt",
-    "-Wno-packed",
-    "-Wno-padded",
-    "-Wno-sign-compare",
-    "-Wno-float-conversion",
-    "-Wno-float-equal",
-    "-Wno-format-nonliteral",
-    "-Wno-gcc-compat",
-    "-Wno-global-constructors",
-    "-Wno-exit-time-destructors",
-    "-Wno-non-modular-include-in-module",
-    "-Wno-old-style-cast",
-    "-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",
-    "-Wno-unused-macros",
-    "-Wno-weak-vtables",
-    "-Wno-zero-as-null-pointer-constant",
-    "-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",
     "/DNOMINMAX",
     "/DWIN32_LEAN_AND_MEAN",
     "/D_CRT_SECURE_NO_WARNINGS",
@@ -79,16 +38,17 @@ ABSL_GCC_FLAGS = [
     "-Wextra",
     "-Wcast-qual",
     "-Wconversion-null",
+    "-Wformat-security",
     "-Wmissing-declarations",
     "-Woverlength-strings",
     "-Wpointer-arith",
+    "-Wundef",
     "-Wunused-local-typedefs",
     "-Wunused-result",
     "-Wvarargs",
     "-Wvla",
     "-Wwrite-strings",
-    "-Wno-missing-field-initializers",
-    "-Wno-sign-compare",
+    "-DNOMINMAX",
 ]
 
 ABSL_GCC_TEST_FLAGS = [
@@ -104,48 +64,37 @@ ABSL_GCC_TEST_FLAGS = [
 ABSL_LLVM_FLAGS = [
     "-Wall",
     "-Wextra",
-    "-Weverything",
-    "-Wno-c++98-compat-pedantic",
-    "-Wno-conversion",
-    "-Wno-covered-switch-default",
-    "-Wno-deprecated",
-    "-Wno-disabled-macro-expansion",
-    "-Wno-double-promotion",
-    "-Wno-comma",
-    "-Wno-extra-semi",
-    "-Wno-extra-semi-stmt",
-    "-Wno-packed",
-    "-Wno-padded",
-    "-Wno-sign-compare",
+    "-Wcast-qual",
+    "-Wconversion",
+    "-Wfloat-overflow-conversion",
+    "-Wfloat-zero-conversion",
+    "-Wfor-loop-analysis",
+    "-Wformat-security",
+    "-Wgnu-redeclared-enum",
+    "-Winfinite-recursion",
+    "-Wliteral-conversion",
+    "-Wmissing-declarations",
+    "-Woverlength-strings",
+    "-Wpointer-arith",
+    "-Wself-assign",
+    "-Wshadow",
+    "-Wstring-conversion",
+    "-Wtautological-overlap-compare",
+    "-Wundef",
+    "-Wuninitialized",
+    "-Wunreachable-code",
+    "-Wunused-comparison",
+    "-Wunused-local-typedefs",
+    "-Wunused-result",
+    "-Wvla",
+    "-Wwrite-strings",
     "-Wno-float-conversion",
-    "-Wno-float-equal",
-    "-Wno-format-nonliteral",
-    "-Wno-gcc-compat",
-    "-Wno-global-constructors",
-    "-Wno-exit-time-destructors",
-    "-Wno-non-modular-include-in-module",
-    "-Wno-old-style-cast",
-    "-Wno-range-loop-analysis",
-    "-Wno-reserved-id-macro",
+    "-Wno-implicit-float-conversion",
+    "-Wno-implicit-int-float-conversion",
+    "-Wno-implicit-int-conversion",
     "-Wno-shorten-64-to-32",
-    "-Wno-switch-enum",
-    "-Wno-thread-safety-negative",
-    "-Wno-unknown-warning-option",
-    "-Wno-unreachable-code",
-    "-Wno-unused-macros",
-    "-Wno-weak-vtables",
-    "-Wno-zero-as-null-pointer-constant",
-    "-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",
+    "-DNOMINMAX",
 ]
 
 ABSL_LLVM_TEST_FLAGS = [