Export of internal Abseil changes.

--
f6c627ce4470a814adc377947b58346eef69a4c9 by Jon Cohen <cohenjon@google.com>:

Don't create install rules when Abseil is used as a subdirectory.

Fix #287

PiperOrigin-RevId: 240559825

--
a5d9b06fe736143068997988b654b5f66ec3266a by Matt Calabrese <calabrese@google.com>:

Make absl::nullopt an inline constexpr variable, as specified in the standard (with a workaround for pre-c++17 compilers).

PiperOrigin-RevId: 240552286

--
d7bee50cff745fbb8d1cdf56a200d9073d311c80 by Abseil Team <absl-team@google.com>:

Internal Change

PiperOrigin-RevId: 240425622

--
828dd49d392d83dbeecd9d3e9cb14551ab265905 by Jon Cohen <cohenjon@google.com>:

Add default link options to absl builds.

Currently all this does is add -ignore:4221 to Abseil msvc builds, but the structure is all in place to add more link options when necessary

Fix #277

Note: This CL changes tact for us in that it puts the default options in the helper function as opposed to the invocations of absl_cc_blah.  The original intent of keeping these out of the helper functions was to make generating the CMakeLists.txt files have a smaller diff, but looking now that is a problem for the future, and small compared to making maintenance and use of our CMake buildsystem easier
PiperOrigin-RevId: 240409463

--
4aa120e9dcf76d29e9ca0008d0f6d4d9fa8abe8c by Matt Kulukundis <kfm@google.com>:

Reduce flake rate for non-determistic test to < 1/10,000

PiperOrigin-RevId: 240370938

--
bc30e219531827bfbf90915b2067c7fb8160bb6d by Derek Mauro <dmauro@google.com>:

Add Bazel caching on Kokoro for new linux targets.

PiperOrigin-RevId: 240356556

--
c4e06d79a50d7bb211312b7845c4bd92c0761747 by Jon Cohen <cohenjon@google.com>:

include AbseilInstallDirs instead of GNUInstallDirs.  It worked before because global_CMakeLists.txt also included AbseilInstallDirs

PiperOrigin-RevId: 240206409

--
c254dc6cade8a263f3f97fb1417d92fe5235ff32 by Jon Cohen <cohenjon@google.com>:

Fix logic for when we create the variant_exception_safety_test in CMake.  Currently we are only running in on gcc > 4.9, when we want it run on every compiler except gcc <= 4.8

PiperOrigin-RevId: 240194174

--
01518006b351d3670ba1d349cfbcb7dd6f3a8b84 by CJ Johnson <johnsoncj@google.com>:

Removes old implementation warning comment now that InlinedVector has an implementation detail file

PiperOrigin-RevId: 240167265

--
eb05355ae8c7397752ab7a65afc9e0a99472ba9d by Jon Cohen <cohenjon@google.com>:

Remove the forward declaration of Span

PiperOrigin-RevId: 240156660

--
b7e75aa3933d6e79dd086821cf58d15e72f476f4 by Jon Cohen <cohenjon@google.com>:

Prepare CMake install rule for LTS releases:
  * Remove the warning against installing in system install locations
  * Insert versioning to keep different LTS installs from colliding.  Headers are installed in <prefix>/absl_$version/include, .a files in <prefix>/absl_$version/lib, and config files in <prefix>/absl_$version/lib/cmake

PiperOrigin-RevId: 240153986

--
de63488ab6236e041f08260794b0b634a2b8ed16 by CJ Johnson <johnsoncj@google.com>:

Reduce reader confusion by using std::addressof(...) even when the type is known to not overload operator&(...)

PiperOrigin-RevId: 240131902
GitOrigin-RevId: f6c627ce4470a814adc377947b58346eef69a4c9
Change-Id: I95dbbacaaf65aceeeca9e9bee5fd9ea456225f62

25 files changed, 301 insertions, 166 deletions

diff --git a/absl/algorithm/BUILD.bazel b/absl/algorithm/BUILD.bazel
index 8d266db5..c506f3b9 100644
--- a/absl/algorithm/BUILD.bazel
+++ b/absl/algorithm/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -28,6 +29,7 @@ cc_library(
     name = "algorithm",
     hdrs = ["algorithm.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_test(
@@ -35,6 +37,7 @@ cc_test(
     size = "small",
     srcs = ["algorithm_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":algorithm",
         "@com_google_googletest//:gtest_main",
@@ -45,6 +48,7 @@ cc_test(
     name = "algorithm_benchmark",
     srcs = ["equal_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     deps = [
         ":algorithm",
@@ -59,6 +63,7 @@ cc_library(
         "container.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":algorithm",
         "//absl/base:core_headers",
@@ -70,6 +75,7 @@ cc_test(
     name = "container_test",
     srcs = ["container_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":container",
         "//absl/base",
diff --git a/absl/base/BUILD.bazel b/absl/base/BUILD.bazel
index 804f62a0..8133a462 100644
--- a/absl/base/BUILD.bazel
+++ b/absl/base/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
     "ABSL_EXCEPTIONS_FLAG",
     "ABSL_EXCEPTIONS_FLAG_LINKOPTS",
@@ -40,6 +41,7 @@ cc_library(
         "internal/spinlock_wait.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl/base:__pkg__",
     ],
@@ -53,6 +55,7 @@ cc_library(
         "policy_checks.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_library(
@@ -61,6 +64,7 @@ cc_library(
     hdrs = ["dynamic_annotations.h"],
     copts = ABSL_DEFAULT_COPTS,
     defines = ["__CLANG_SUPPORT_DYN_ANNOTATION__"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_library(
@@ -74,6 +78,7 @@ cc_library(
         "thread_annotations.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":config",
     ],
@@ -92,7 +97,7 @@ cc_library(
     linkopts = select({
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
-    }),
+    }) + ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -115,6 +120,7 @@ cc_library(
         "internal/scheduling_mode.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -149,7 +155,7 @@ cc_library(
     linkopts = select({
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
-    }),
+    }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base_internal",
         ":config",
@@ -164,6 +170,7 @@ cc_test(
     size = "small",
     srcs = ["internal/atomic_hook_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -178,6 +185,7 @@ cc_test(
         "bit_cast_test.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -190,7 +198,7 @@ cc_library(
     srcs = ["internal/throw_delegate.cc"],
     hdrs = ["internal/throw_delegate.h"],
     copts = ABSL_DEFAULT_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -204,7 +212,7 @@ cc_test(
     name = "throw_delegate_test",
     srcs = ["throw_delegate_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":throw_delegate",
         "@com_google_googletest//:gtest_main",
@@ -216,6 +224,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/exception_testing.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -228,6 +237,7 @@ cc_library(
 cc_library(
     name = "pretty_function",
     hdrs = ["internal/pretty_function.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//absl:__subpackages__"],
 )
 
@@ -237,7 +247,7 @@ cc_library(
     srcs = ["internal/exception_safety_testing.cc"],
     hdrs = ["internal/exception_safety_testing.h"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":config",
         ":pretty_function",
@@ -253,7 +263,7 @@ cc_test(
     name = "exception_safety_testing_test",
     srcs = ["exception_safety_testing_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":exception_safety_testing",
         "//absl/memory",
@@ -271,6 +281,7 @@ cc_test(
         "internal/inline_variable_testing.h",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base_internal",
         "@com_google_googletest//:gtest_main",
@@ -282,6 +293,7 @@ cc_test(
     size = "small",
     srcs = ["invoke_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base_internal",
         "//absl/memory",
@@ -297,6 +309,7 @@ cc_library(
     testonly = 1,
     srcs = ["spinlock_test_common.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -312,7 +325,7 @@ cc_test(
     size = "medium",
     srcs = ["spinlock_test_common.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = ["no_test_wasm"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -327,6 +340,7 @@ cc_library(
     testonly = 1,
     srcs = ["internal/spinlock_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl/base:__pkg__",
     ],
@@ -343,6 +357,7 @@ cc_binary(
     name = "spinlock_benchmark",
     testonly = 1,
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":spinlock_benchmark_common",
@@ -356,6 +371,7 @@ cc_library(
         "internal/unaligned_access.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":config",
         ":core_headers",
@@ -378,9 +394,7 @@ cc_test(
     name = "config_test",
     srcs = ["config_test.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = [
-        "no_test_wasm",
-    ],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":config",
         "//absl/synchronization:thread_pool",
@@ -392,9 +406,7 @@ cc_test(
     name = "call_once_test",
     srcs = ["call_once_test.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = [
-        "no_test_wasm",
-    ],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -407,6 +419,7 @@ cc_test(
     name = "raw_logging_test",
     srcs = ["raw_logging_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         "//absl/strings",
@@ -419,6 +432,7 @@ cc_test(
     size = "small",
     srcs = ["internal/sysinfo_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         "//absl/synchronization",
@@ -431,6 +445,7 @@ cc_test(
     size = "small",
     srcs = ["internal/low_level_alloc_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["no_test_ios_x86_64"],
     deps = [":malloc_internal"],
 )
@@ -440,9 +455,7 @@ cc_test(
     size = "small",
     srcs = ["internal/thread_identity_test.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = [
-        "no_test_wasm",
-    ],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":base",
         ":core_headers",
@@ -455,6 +468,7 @@ cc_test(
     name = "thread_identity_benchmark",
     srcs = ["internal/thread_identity_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     visibility = ["//visibility:private"],
     deps = [
@@ -467,6 +481,7 @@ cc_test(
 cc_library(
     name = "bits",
     hdrs = ["internal/bits.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -478,6 +493,7 @@ cc_test(
     size = "small",
     srcs = ["internal/bits_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":bits",
         "@com_google_googletest//:gtest_main",
@@ -489,6 +505,7 @@ cc_library(
     testonly = 1,
     srcs = ["internal/scoped_set_env.cc"],
     hdrs = ["internal/scoped_set_env.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -500,6 +517,7 @@ cc_test(
     size = "small",
     srcs = ["internal/scoped_set_env_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":scoped_set_env",
         "@com_google_googletest//:gtest_main",
diff --git a/absl/container/BUILD.bazel b/absl/container/BUILD.bazel
index cd914baf..066a9886 100644
--- a/absl/container/BUILD.bazel
+++ b/absl/container/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_EXCEPTIONS_FLAG",
     "ABSL_EXCEPTIONS_FLAG_LINKOPTS",
     "ABSL_TEST_COPTS",
@@ -30,6 +31,7 @@ cc_library(
     name = "compressed_tuple",
     hdrs = ["internal/compressed_tuple.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/utility",
     ],
@@ -39,6 +41,7 @@ cc_test(
     name = "compressed_tuple_test",
     srcs = ["internal/compressed_tuple_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":compressed_tuple",
         "//absl/memory",
@@ -51,6 +54,7 @@ cc_library(
     name = "fixed_array",
     hdrs = ["fixed_array.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":compressed_tuple",
         "//absl/algorithm",
@@ -65,7 +69,7 @@ cc_test(
     name = "fixed_array_test",
     srcs = ["fixed_array_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":fixed_array",
         "//absl/base:exception_testing",
@@ -79,6 +83,7 @@ cc_test(
     name = "fixed_array_test_noexceptions",
     srcs = ["fixed_array_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":fixed_array",
         "//absl/base:exception_testing",
@@ -92,7 +97,7 @@ cc_test(
     name = "fixed_array_exception_safety_test",
     srcs = ["fixed_array_exception_safety_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":fixed_array",
         "//absl/base:exception_safety_testing",
@@ -104,6 +109,7 @@ cc_test(
     name = "fixed_array_benchmark",
     srcs = ["fixed_array_benchmark.cc"],
     copts = ABSL_TEST_COPTS + ["$(STACK_FRAME_UNLIMITED)"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     deps = [
         ":fixed_array",
@@ -115,6 +121,7 @@ cc_library(
     name = "inlined_vector_internal",
     hdrs = ["internal/inlined_vector.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/meta:type_traits",
     ],
@@ -124,6 +131,7 @@ cc_library(
     name = "inlined_vector",
     hdrs = ["inlined_vector.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":inlined_vector_internal",
         "//absl/algorithm",
@@ -138,6 +146,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/counting_allocator.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
 )
 
@@ -145,7 +154,7 @@ cc_test(
     name = "inlined_vector_test",
     srcs = ["inlined_vector_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":counting_allocator",
         ":inlined_vector",
@@ -164,6 +173,7 @@ cc_test(
     name = "inlined_vector_test_noexceptions",
     srcs = ["inlined_vector_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":counting_allocator",
         ":inlined_vector",
@@ -182,6 +192,7 @@ cc_test(
     name = "inlined_vector_benchmark",
     srcs = ["inlined_vector_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     deps = [
         ":inlined_vector",
@@ -197,6 +208,7 @@ cc_library(
     srcs = ["internal/test_instance_tracker.cc"],
     hdrs = ["internal/test_instance_tracker.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -206,6 +218,7 @@ cc_test(
     name = "test_instance_tracker_test",
     srcs = ["internal/test_instance_tracker_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":test_instance_tracker",
         "@com_google_googletest//:gtest_main",
@@ -230,6 +243,7 @@ cc_library(
     name = "flat_hash_map",
     hdrs = ["flat_hash_map.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":container_memory",
         ":hash_function_defaults",
@@ -243,6 +257,7 @@ cc_test(
     name = "flat_hash_map_test",
     srcs = ["flat_hash_map_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":flat_hash_map",
@@ -260,6 +275,7 @@ cc_library(
     name = "flat_hash_set",
     hdrs = ["flat_hash_set.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":container_memory",
         ":hash_function_defaults",
@@ -274,6 +290,7 @@ cc_test(
     name = "flat_hash_set_test",
     srcs = ["flat_hash_set_test.cc"],
     copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":flat_hash_set",
@@ -292,6 +309,7 @@ cc_library(
     name = "node_hash_map",
     hdrs = ["node_hash_map.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":container_memory",
         ":hash_function_defaults",
@@ -306,6 +324,7 @@ cc_test(
     name = "node_hash_map_test",
     srcs = ["node_hash_map_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":hash_generator_testing",
@@ -323,6 +342,7 @@ cc_library(
     name = "node_hash_set",
     hdrs = ["node_hash_set.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_function_defaults",
         ":node_hash_policy",
@@ -336,6 +356,7 @@ cc_test(
     name = "node_hash_set_test",
     srcs = ["node_hash_set_test.cc"],
     copts = ABSL_TEST_COPTS + ["-DUNORDERED_SET_CXX17"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":node_hash_set",
@@ -351,6 +372,7 @@ cc_library(
     name = "container_memory",
     hdrs = ["internal/container_memory.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/memory",
         "//absl/utility",
@@ -361,6 +383,7 @@ cc_test(
     name = "container_memory_test",
     srcs = ["internal/container_memory_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":container_memory",
@@ -373,6 +396,7 @@ cc_library(
     name = "hash_function_defaults",
     hdrs = ["internal/hash_function_defaults.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
         "//absl/hash",
@@ -384,6 +408,7 @@ cc_test(
     name = "hash_function_defaults_test",
     srcs = ["internal/hash_function_defaults_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS,
     deps = [
         ":hash_function_defaults",
@@ -399,6 +424,7 @@ cc_library(
     srcs = ["internal/hash_generator_testing.cc"],
     hdrs = ["internal/hash_generator_testing.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_policy_testing",
         "//absl/meta:type_traits",
@@ -411,6 +437,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/hash_policy_testing.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/hash",
         "//absl/strings",
@@ -421,6 +448,7 @@ cc_test(
     name = "hash_policy_testing_test",
     srcs = ["internal/hash_policy_testing_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_policy_testing",
         "@com_google_googletest//:gtest_main",
@@ -431,6 +459,7 @@ cc_library(
     name = "hash_policy_traits",
     hdrs = ["internal/hash_policy_traits.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = ["//absl/meta:type_traits"],
 )
 
@@ -438,6 +467,7 @@ cc_test(
     name = "hash_policy_traits_test",
     srcs = ["internal/hash_policy_traits_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_policy_traits",
         "@com_google_googletest//:gtest_main",
@@ -448,6 +478,7 @@ cc_library(
     name = "hashtable_debug",
     hdrs = ["internal/hashtable_debug.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hashtable_debug_hooks",
     ],
@@ -457,6 +488,7 @@ cc_library(
     name = "hashtable_debug_hooks",
     hdrs = ["internal/hashtable_debug_hooks.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_library(
@@ -467,6 +499,7 @@ cc_library(
     ],
     hdrs = ["internal/hashtablez_sampler.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":have_sse",
         "//absl/base",
@@ -481,6 +514,7 @@ cc_library(
 cc_test(
     name = "hashtablez_sampler_test",
     srcs = ["internal/hashtablez_sampler_test.cc"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hashtablez_sampler",
         ":have_sse",
@@ -496,12 +530,14 @@ cc_library(
     name = "node_hash_policy",
     hdrs = ["internal/node_hash_policy.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_test(
     name = "node_hash_policy_test",
     srcs = ["internal/node_hash_policy_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_policy_traits",
         ":node_hash_policy",
@@ -513,6 +549,7 @@ cc_library(
     name = "raw_hash_map",
     hdrs = ["internal/raw_hash_map.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":container_memory",
         ":raw_hash_set",
@@ -523,6 +560,7 @@ cc_library(
     name = "have_sse",
     hdrs = ["internal/have_sse.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
 )
 
@@ -530,6 +568,7 @@ cc_library(
     name = "common",
     hdrs = ["internal/common.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/meta:type_traits",
         "//absl/types:optional",
@@ -541,6 +580,7 @@ cc_library(
     srcs = ["internal/raw_hash_set.cc"],
     hdrs = ["internal/raw_hash_set.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":common",
         ":compressed_tuple",
@@ -584,6 +624,7 @@ cc_test(
     size = "small",
     srcs = ["internal/raw_hash_set_allocator_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":raw_hash_set",
         ":tracked",
@@ -596,6 +637,7 @@ cc_library(
     name = "layout",
     hdrs = ["internal/layout.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:core_headers",
         "//absl/meta:type_traits",
@@ -610,6 +652,7 @@ cc_test(
     size = "small",
     srcs = ["internal/layout_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS,
     visibility = ["//visibility:private"],
     deps = [
@@ -626,6 +669,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/tracked.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
 )
 
 cc_library(
@@ -633,6 +677,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_map_constructor_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -645,6 +690,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_map_lookup_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -657,6 +703,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_map_modifiers_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -669,6 +716,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_set_constructor_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -682,6 +730,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_set_members_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/meta:type_traits",
         "@com_google_googletest//:gtest",
@@ -693,6 +742,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_map_members_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/meta:type_traits",
         "@com_google_googletest//:gtest",
@@ -704,6 +754,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_set_lookup_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -716,6 +767,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/unordered_set_modifiers_test.h"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash_generator_testing",
         ":hash_policy_testing",
@@ -727,6 +779,7 @@ cc_test(
     name = "unordered_set_test",
     srcs = ["internal/unordered_set_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":unordered_set_constructor_test",
@@ -741,6 +794,7 @@ cc_test(
     name = "unordered_map_test",
     srcs = ["internal/unordered_map_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = NOTEST_TAGS_NONMOBILE,
     deps = [
         ":unordered_map_constructor_test",
diff --git a/absl/container/inlined_vector.h b/absl/container/inlined_vector.h
index 77988058..bd4ed666 100644
--- a/absl/container/inlined_vector.h
+++ b/absl/container/inlined_vector.h
@@ -454,7 +454,7 @@ class InlinedVector {
   // Overload of `InlinedVector::operator=()` to replace the contents of the
   // inlined vector with the contents of `other`.
   InlinedVector& operator=(const InlinedVector& other) {
-    if (ABSL_PREDICT_FALSE(this == &other)) return *this;
+    if (ABSL_PREDICT_FALSE(this == std::addressof(other))) return *this;
 
     // Optimized to avoid reallocation.
     // Prefer reassignment to copy construction for elements.
@@ -475,7 +475,7 @@ class InlinedVector {
   // NOTE: As a result of calling this overload, `other` may be empty or it's
   // contents may be left in a moved-from state.
   InlinedVector& operator=(InlinedVector&& other) {
-    if (ABSL_PREDICT_FALSE(this == &other)) return *this;
+    if (ABSL_PREDICT_FALSE(this == std::addressof(other))) return *this;
 
     if (other.allocated()) {
       clear();
@@ -840,7 +840,7 @@ class InlinedVector {
   //
   // Swaps the contents of this inlined vector with the contents of `other`.
   void swap(InlinedVector& other) {
-    if (ABSL_PREDICT_FALSE(this == &other)) return;
+    if (ABSL_PREDICT_FALSE(this == std::addressof(other))) return;
 
     SwapImpl(other);
   }
@@ -864,7 +864,8 @@ class InlinedVector {
   }
 
   void init_allocation(const Allocation& allocation) {
-    new (&storage_.rep_.allocation_storage.allocation) Allocation(allocation);
+    new (static_cast<void*>(std::addressof(
+        storage_.rep_.allocation_storage.allocation))) Allocation(allocation);
   }
 
   // TODO(absl-team): investigate whether the reinterpret_cast is appropriate.
@@ -1154,7 +1155,7 @@ class InlinedVector {
     if (!allocated() && !other.allocated()) {
       // Both inlined: swap up to smaller size, then move remaining elements.
       InlinedVector* a = this;
-      InlinedVector* b = &other;
+      InlinedVector* b = std::addressof(other);
       if (size() < other.size()) {
         swap(a, b);
       }
@@ -1186,7 +1187,7 @@ class InlinedVector {
     // pointer/capacity into the originally inlined vector and swap
     // the tags.
     InlinedVector* a = this;
-    InlinedVector* b = &other;
+    InlinedVector* b = std::addressof(other);
     if (a->allocated()) {
       swap(a, b);
     }
@@ -1305,10 +1306,4 @@ auto AbslHashValue(H h, const InlinedVector<TheT, TheN, TheA>& v) -> H {
 }
 }  // namespace absl
 
-// -----------------------------------------------------------------------------
-// Implementation of InlinedVector
-//
-// Do not depend on any below implementation details!
-// -----------------------------------------------------------------------------
-
 #endif  // ABSL_CONTAINER_INLINED_VECTOR_H_
diff --git a/absl/container/internal/raw_hash_set_test.cc b/absl/container/internal/raw_hash_set_test.cc
index 02fd0bfa..4d94f785 100644
--- a/absl/container/internal/raw_hash_set_test.cc
+++ b/absl/container/internal/raw_hash_set_test.cc
@@ -1785,7 +1785,7 @@ TEST(Table, IterationOrderChangesByInstance) {
 
     std::vector<IntTable> tables;
     bool found_difference = false;
-    for (int i = 0; !found_difference && i < 500; ++i) {
+    for (int i = 0; !found_difference && i < 5000; ++i) {
       tables.push_back(MakeSimpleTable(size));
       found_difference = OrderOfIteration(tables.back()) != reference;
     }
@@ -1799,7 +1799,7 @@ TEST(Table, IterationOrderChangesByInstance) {
 
 TEST(Table, IterationOrderChangesOnRehash) {
   std::vector<IntTable> garbage;
-  for (int i = 0; i < 500; ++i) {
+  for (int i = 0; i < 5000; ++i) {
     auto t = MakeSimpleTable(20);
     const auto reference = OrderOfIteration(t);
     // Force rehash to the same size.
diff --git a/absl/copts/AbseilConfigureCopts.cmake b/absl/copts/AbseilConfigureCopts.cmake
index 5084958c..b2b3f88d 100644
--- a/absl/copts/AbseilConfigureCopts.cmake
+++ b/absl/copts/AbseilConfigureCopts.cmake
@@ -3,6 +3,7 @@ include(GENERATED_AbseilCopts)
 
 set(ABSL_LSAN_LINKOPTS "")
 set(ABSL_HAVE_LSAN OFF)
+set(ABSL_DEFAULT_LINKOPTS "")
 
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
@@ -19,6 +20,7 @@ elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
     set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
     set(ABSL_EXCEPTIONS_FLAG "${ABSL_LLVM_EXCEPTIONS_FLAGS}")
+    set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
     if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
       # AppleClang doesn't have lsan
       # https://developer.apple.com/documentation/code_diagnostics
@@ -32,6 +34,7 @@ elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
   set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}")
   set(ABSL_TEST_COPTS "${ABSL_MSVC_FLAGS};${ABSL_MSVC_TEST_FLAGS}")
   set(ABSL_EXCEPTIONS_FLAG "${ABSL_MSVC_EXCEPTIONS_FLAGS}")
+  set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
 else()
   message(WARNING "Unknown compiler: ${CMAKE_CXX_COMPILER}.  Building with no default flags")
   set(ABSL_DEFAULT_COPTS "")
diff --git a/absl/copts/GENERATED_AbseilCopts.cmake b/absl/copts/GENERATED_AbseilCopts.cmake
index 9031bfa5..043c88a2 100644
--- a/absl/copts/GENERATED_AbseilCopts.cmake
+++ b/absl/copts/GENERATED_AbseilCopts.cmake
@@ -201,6 +201,10 @@ list(APPEND ABSL_MSVC_FLAGS
     "/wd4800"
 )
 
+list(APPEND ABSL_MSVC_LINKOPTS
+    "-ignore:4221"
+)
+
 list(APPEND ABSL_MSVC_TEST_FLAGS
     "/wd4018"
     "/wd4101"
diff --git a/absl/copts/GENERATED_copts.bzl b/absl/copts/GENERATED_copts.bzl
index e05a58e3..d40380b8 100644
--- a/absl/copts/GENERATED_copts.bzl
+++ b/absl/copts/GENERATED_copts.bzl
@@ -202,6 +202,10 @@ ABSL_MSVC_FLAGS = [
     "/wd4800",
 ]
 
+ABSL_MSVC_LINKOPTS = [
+    "-ignore:4221",
+]
+
 ABSL_MSVC_TEST_FLAGS = [
     "/wd4018",
     "/wd4101",
diff --git a/absl/copts/configure_copts.bzl b/absl/copts/configure_copts.bzl
index 1655addd..00159317 100644
--- a/absl/copts/configure_copts.bzl
+++ b/absl/copts/configure_copts.bzl
@@ -14,6 +14,7 @@ load(
     "ABSL_LLVM_TEST_FLAGS",
     "ABSL_MSVC_EXCEPTIONS_FLAGS",
     "ABSL_MSVC_FLAGS",
+    "ABSL_MSVC_LINKOPTS",
     "ABSL_MSVC_TEST_FLAGS",
 )
 
@@ -40,3 +41,8 @@ ABSL_EXCEPTIONS_FLAG = select({
 ABSL_EXCEPTIONS_FLAG_LINKOPTS = select({
     "//conditions:default": [],
 })
+
+ABSL_DEFAULT_LINKOPTS = select({
+    "//absl:windows": ABSL_MSVC_LINKOPTS,
+    "//conditions:default": [],
+})
diff --git a/absl/copts/copts.py b/absl/copts/copts.py
index 3c9d4294..608d7c0e 100644
--- a/absl/copts/copts.py
+++ b/absl/copts/copts.py
@@ -153,26 +153,39 @@ COPT_VARS = {
         "-Wno-unused-private-field",
     ],
     "ABSL_GCC_EXCEPTIONS_FLAGS": ["-fexceptions"],
-    "ABSL_LLVM_FLAGS": LLVM_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS,
-    "ABSL_LLVM_TEST_FLAGS": LLVM_TEST_DISABLE_WARNINGS_FLAGS,
+    "ABSL_LLVM_FLAGS":
+        LLVM_BIG_WARNING_FLAGS + LLVM_DISABLE_WARNINGS_FLAGS,
+    "ABSL_LLVM_TEST_FLAGS":
+        LLVM_TEST_DISABLE_WARNINGS_FLAGS,
     "ABSL_LLVM_EXCEPTIONS_FLAGS": ["-fexceptions"],
-    "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_CLANG_CL_EXCEPTIONS_FLAGS": MSVC_STYLE_EXCEPTIONS_FLAGS,
-    "ABSL_MSVC_FLAGS": MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [
-        "/wd4005",  # macro-redefinition
-        "/wd4068",  # unknown pragma
-        "/wd4180",  # qualifier applied to function type has no meaning; ignored
-        "/wd4244",  # conversion from 'type1' to 'type2', possible loss of data
-        "/wd4267",  # conversion from 'size_t' to 'type', possible loss of data
-        # forcing value to bool 'true' or 'false' (performance warning)
-        "/wd4800",
-    ],
+    "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_CLANG_CL_EXCEPTIONS_FLAGS":
+        MSVC_STYLE_EXCEPTIONS_FLAGS,
+    "ABSL_MSVC_FLAGS":
+        MSVC_BIG_WARNING_FLAGS + MSVC_DEFINES + [
+            "/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",
+            # 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
     ],
-    "ABSL_MSVC_EXCEPTIONS_FLAGS": MSVC_STYLE_EXCEPTIONS_FLAGS,
+    "ABSL_MSVC_EXCEPTIONS_FLAGS":
+        MSVC_STYLE_EXCEPTIONS_FLAGS,
+    "ABSL_MSVC_LINKOPTS": [
+        # Object file doesn't export any previously undefined symbols
+        "/ignore:4221",
+    ],
 }
diff --git a/absl/debugging/BUILD.bazel b/absl/debugging/BUILD.bazel
index c9184f92..0854314e 100644
--- a/absl/debugging/BUILD.bazel
+++ b/absl/debugging/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -33,6 +34,7 @@ cc_library(
     ],
     hdrs = ["stacktrace.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":debugging_internal",
         "//absl/base",
@@ -53,6 +55,7 @@ cc_library(
         "symbolize.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":debugging_internal",
         ":demangle_internal",
@@ -66,6 +69,7 @@ cc_test(
     name = "symbolize_test",
     srcs = ["symbolize_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":stack_consumption",
         ":symbolize",
@@ -85,6 +89,7 @@ cc_library(
         "internal/examine_stack.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":stacktrace",
@@ -99,6 +104,7 @@ cc_library(
     srcs = ["failure_signal_handler.cc"],
     hdrs = ["failure_signal_handler.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":examine_stack",
         ":stacktrace",
@@ -115,7 +121,7 @@ cc_test(
     linkopts = select({
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
-    }),
+    }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":failure_signal_handler",
         ":stacktrace",
@@ -147,6 +153,7 @@ cc_library(
         "internal/vdso_support.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base",
         "//absl/base:core_headers",
@@ -169,6 +176,7 @@ cc_test(
     name = "demangle_test",
     srcs = ["internal/demangle_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":demangle_internal",
         ":stack_consumption",
@@ -183,6 +191,7 @@ cc_library(
     name = "leak_check",
     srcs = ["leak_check.cc"],
     hdrs = ["leak_check.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = ["//absl/base:core_headers"],
 )
 
@@ -192,6 +201,7 @@ cc_library(
 cc_library(
     name = "leak_check_disable",
     srcs = ["leak_check_disable.cc"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     linkstatic = 1,
     alwayslink = 1,
 )
@@ -212,6 +222,7 @@ cc_library(
         "//absl:llvm_compiler": ["-DLEAK_SANITIZER"],
         "//conditions:default": [],
     }),
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
 )
 
@@ -221,6 +232,7 @@ cc_library(
     srcs = ["leak_check.cc"],
     hdrs = ["leak_check.h"],
     copts = ["-ULEAK_SANITIZER"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
 )
 
@@ -231,7 +243,7 @@ cc_test(
         "//absl:llvm_compiler": ["-DABSL_EXPECT_LEAK_SANITIZER"],
         "//conditions:default": [],
     }),
-    linkopts = ABSL_LSAN_LINKOPTS,
+    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":leak_check_api_enabled_for_testing",
         "//absl/base",
@@ -243,6 +255,7 @@ cc_test(
     name = "leak_check_no_lsan_test",
     srcs = ["leak_check_test.cc"],
     copts = ["-UABSL_EXPECT_LEAK_SANITIZER"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":leak_check_api_disabled_for_testing",
         "//absl/base",  # for raw_logging
@@ -257,7 +270,7 @@ cc_test(
 cc_test(
     name = "disabled_leak_check_test",
     srcs = ["leak_check_fail_test.cc"],
-    linkopts = ABSL_LSAN_LINKOPTS,
+    linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":leak_check_api_enabled_for_testing",
         ":leak_check_disable",
@@ -272,6 +285,7 @@ cc_library(
     srcs = ["internal/stack_consumption.cc"],
     hdrs = ["internal/stack_consumption.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         "//absl/base",
@@ -283,6 +297,7 @@ cc_test(
     name = "stack_consumption_test",
     srcs = ["internal/stack_consumption_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":stack_consumption",
         "//absl/base",
diff --git a/absl/hash/BUILD.bazel b/absl/hash/BUILD.bazel
index 69860d98..8c2daf70 100644
--- a/absl/hash/BUILD.bazel
+++ b/absl/hash/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -32,6 +33,7 @@ cc_library(
     ],
     hdrs = ["hash.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":city",
         "//absl/base:core_headers",
@@ -50,6 +52,7 @@ cc_library(
     name = "hash_testing",
     testonly = 1,
     hdrs = ["hash_testing.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":spy_hash_state",
         "//absl/meta:type_traits",
@@ -63,6 +66,7 @@ cc_test(
     name = "hash_test",
     srcs = ["hash_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":hash",
         ":hash_testing",
@@ -80,6 +84,7 @@ cc_library(
     testonly = 1,
     hdrs = ["internal/spy_hash_state.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":hash",
@@ -95,6 +100,7 @@ cc_library(
         "internal/city.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
         "//absl/base:core_headers",
@@ -106,6 +112,7 @@ cc_test(
     name = "city_test",
     srcs = ["internal/city_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":city",
         "@com_google_googletest//:gtest_main",
diff --git a/absl/memory/BUILD.bazel b/absl/memory/BUILD.bazel
index 7c6366fe..f815ef94 100644
--- a/absl/memory/BUILD.bazel
+++ b/absl/memory/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
     "ABSL_EXCEPTIONS_FLAG",
     "ABSL_EXCEPTIONS_FLAG_LINKOPTS",
@@ -30,6 +31,7 @@ cc_library(
     name = "memory",
     hdrs = ["memory.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:core_headers",
         "//absl/meta:type_traits",
@@ -40,6 +42,7 @@ cc_test(
     name = "memory_test",
     srcs = ["memory_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":memory",
         "//absl/base",
@@ -54,7 +57,7 @@ cc_test(
         "memory_exception_safety_test.cc",
     ],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":memory",
         "//absl/base:exception_safety_testing",
diff --git a/absl/meta/BUILD.bazel b/absl/meta/BUILD.bazel
index 1c39fa98..c2435f4f 100644
--- a/absl/meta/BUILD.bazel
+++ b/absl/meta/BUILD.bazel
@@ -1,6 +1,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -12,6 +13,7 @@ cc_library(
     name = "type_traits",
     hdrs = ["type_traits.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
     ],
@@ -21,6 +23,7 @@ cc_test(
     name = "type_traits_test",
     srcs = ["type_traits_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":type_traits",
         "//absl/base:core_headers",
diff --git a/absl/numeric/BUILD.bazel b/absl/numeric/BUILD.bazel
index 7cd7ee19..d9b561df 100644
--- a/absl/numeric/BUILD.bazel
+++ b/absl/numeric/BUILD.bazel
@@ -15,6 +15,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -31,6 +32,7 @@ cc_library(
     ],
     hdrs = ["int128.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:config",
         "//absl/base:core_headers",
@@ -45,6 +47,7 @@ cc_test(
         "int128_test.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":int128",
         "//absl/base",
@@ -59,6 +62,7 @@ cc_test(
     name = "int128_benchmark",
     srcs = ["int128_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     deps = [
         ":int128",
diff --git a/absl/synchronization/BUILD.bazel b/absl/synchronization/BUILD.bazel
index 5e69847e..67da9d46 100644
--- a/absl/synchronization/BUILD.bazel
+++ b/absl/synchronization/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -34,6 +35,7 @@ cc_library(
         "internal/graphcycles.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -72,7 +74,7 @@ cc_library(
     linkopts = select({
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
-    }),
+    }) + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":graphcycles_internal",
         "//absl/base",
@@ -92,9 +94,7 @@ cc_test(
     size = "small",
     srcs = ["barrier_test.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = [
-        "no_test_wasm",
-    ],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":synchronization",
         "//absl/time",
@@ -107,9 +107,7 @@ cc_test(
     size = "small",
     srcs = ["blocking_counter_test.cc"],
     copts = ABSL_TEST_COPTS,
-    tags = [
-        "no_test_wasm",
-    ],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":synchronization",
         "//absl/time",
@@ -122,6 +120,7 @@ cc_test(
     size = "medium",
     srcs = ["internal/graphcycles_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":graphcycles_internal",
         "//absl/base",
@@ -134,6 +133,7 @@ cc_test(
     name = "graphcycles_benchmark",
     srcs = ["internal/graphcycles_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = [
         "benchmark",
     ],
@@ -148,6 +148,7 @@ cc_library(
     name = "thread_pool",
     testonly = 1,
     hdrs = ["internal/thread_pool.h"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl:__subpackages__",
     ],
@@ -162,6 +163,7 @@ cc_test(
     size = "large",
     srcs = ["mutex_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     shard_count = 25,
     deps = [
         ":synchronization",
@@ -179,6 +181,7 @@ cc_library(
     testonly = 1,
     srcs = ["mutex_benchmark.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl/synchronization:__pkg__",
     ],
@@ -195,6 +198,7 @@ cc_binary(
     name = "mutex_benchmark",
     testonly = 1,
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         ":mutex_benchmark_common",
@@ -206,6 +210,7 @@ cc_test(
     size = "small",
     srcs = ["notification_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":synchronization",
         "//absl/time",
@@ -218,6 +223,7 @@ cc_library(
     testonly = 1,
     srcs = ["internal/per_thread_sem_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":synchronization",
         "//absl/base",
@@ -232,7 +238,7 @@ cc_test(
     name = "per_thread_sem_test",
     size = "medium",
     copts = ABSL_TEST_COPTS,
-    tags = ["no_test_wasm"],
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":per_thread_sem_test_common",
         ":synchronization",
@@ -249,6 +255,7 @@ cc_test(
         "lifetime_test.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["no_test_ios_x86_64"],
     deps = [
         ":synchronization",
diff --git a/absl/time/BUILD.bazel b/absl/time/BUILD.bazel
index a94be655..55e83a8c 100644
--- a/absl/time/BUILD.bazel
+++ b/absl/time/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -41,6 +42,7 @@ cc_library(
         "time.h",
     ],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base",
         "//absl/base:core_headers",
@@ -60,6 +62,7 @@ cc_library(
     ],
     hdrs = ["internal/test_util.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         "//absl/time:__pkg__",
     ],
@@ -82,6 +85,7 @@ cc_test(
         "time_zone_test.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":test_util",
         ":time",
@@ -103,6 +107,7 @@ cc_test(
         "time_benchmark.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = [
         "benchmark",
     ],
diff --git a/absl/time/internal/cctz/BUILD.bazel b/absl/time/internal/cctz/BUILD.bazel
index 903499be..05f56bca 100644
--- a/absl/time/internal/cctz/BUILD.bazel
+++ b/absl/time/internal/cctz/BUILD.bazel
@@ -87,7 +87,6 @@ cc_test(
         "no_test_android_arm",
         "no_test_android_arm64",
         "no_test_android_x86",
-        "no_test_wasm",
     ],
     deps = [
         ":civil_time",
@@ -106,7 +105,6 @@ cc_test(
         "no_test_android_arm",
         "no_test_android_arm64",
         "no_test_android_x86",
-        "no_test_wasm",
     ],
     deps = [
         ":civil_time",
diff --git a/absl/types/BUILD.bazel b/absl/types/BUILD.bazel
index 7da00030..a62522e4 100644
--- a/absl/types/BUILD.bazel
+++ b/absl/types/BUILD.bazel
@@ -17,6 +17,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
     "ABSL_EXCEPTIONS_FLAG",
     "ABSL_EXCEPTIONS_FLAG_LINKOPTS",
@@ -30,6 +31,7 @@ cc_library(
     name = "any",
     hdrs = ["any.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":bad_any_cast",
         "//absl/base:config",
@@ -43,6 +45,7 @@ cc_library(
     name = "bad_any_cast",
     hdrs = ["bad_any_cast.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":bad_any_cast_impl",
         "//absl/base:config",
@@ -56,7 +59,7 @@ cc_library(
         "bad_any_cast.h",
     ],
     copts = ABSL_EXCEPTIONS_FLAG + ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     visibility = ["//visibility:private"],
     deps = [
         "//absl/base",
@@ -71,7 +74,7 @@ cc_test(
         "any_test.cc",
     ],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":any",
         "//absl/base",
@@ -89,6 +92,7 @@ cc_test(
         "any_test.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":any",
         "//absl/base",
@@ -103,7 +107,7 @@ cc_test(
     name = "any_exception_safety_test",
     srcs = ["any_exception_safety_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":any",
         "//absl/base:exception_safety_testing",
@@ -115,6 +119,7 @@ cc_library(
     name = "span",
     hdrs = ["span.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/algorithm",
         "//absl/base:core_headers",
@@ -128,7 +133,7 @@ cc_test(
     size = "small",
     srcs = ["span_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":span",
         "//absl/base:config",
@@ -147,6 +152,7 @@ cc_test(
     size = "small",
     srcs = ["span_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":span",
         "//absl/base:config",
@@ -162,11 +168,12 @@ cc_test(
 
 cc_library(
     name = "optional",
-    srcs = ["optional.cc"],
     hdrs = ["optional.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":bad_optional_access",
+        "//absl/base:base_internal",
         "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/memory",
@@ -180,7 +187,7 @@ cc_library(
     srcs = ["bad_optional_access.cc"],
     hdrs = ["bad_optional_access.h"],
     copts = ABSL_DEFAULT_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base",
         "//absl/base:config",
@@ -192,7 +199,7 @@ cc_library(
     srcs = ["bad_variant_access.cc"],
     hdrs = ["bad_variant_access.h"],
     copts = ABSL_EXCEPTIONS_FLAG + ABSL_DEFAULT_COPTS,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base",
         "//absl/base:config",
@@ -206,7 +213,7 @@ cc_test(
         "optional_test.cc",
     ],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":optional",
         "//absl/base",
@@ -223,7 +230,7 @@ cc_test(
         "optional_exception_safety_test.cc",
     ],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":optional",
         "//absl/base:exception_safety_testing",
@@ -236,6 +243,7 @@ cc_library(
     srcs = ["internal/variant.h"],
     hdrs = ["variant.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":bad_variant_access",
         "//absl/base:base_internal",
@@ -251,7 +259,7 @@ cc_test(
     size = "small",
     srcs = ["variant_test.cc"],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":variant",
         "//absl/base:config",
@@ -269,6 +277,7 @@ cc_test(
         "variant_benchmark.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = ["benchmark"],
     deps = [
         ":variant",
@@ -284,7 +293,7 @@ cc_test(
         "variant_exception_safety_test.cc",
     ],
     copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
-    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS,
+    linkopts = ABSL_EXCEPTIONS_FLAG_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":variant",
         "//absl/base:config",
diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt
index 8afde466..910c099a 100644
--- a/absl/types/CMakeLists.txt
+++ b/absl/types/CMakeLists.txt
@@ -172,12 +172,11 @@ absl_cc_library(
     optional
   HDRS
     "optional.h"
-  SRCS
-    "optional.cc"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::bad_optional_access
+    absl::base_internal
     absl::config
     absl::core_headers
     absl::memory
@@ -297,7 +296,8 @@ absl_cc_test(
 )
 
 # TODO(cohenjon,zhangxy) Figure out why this test is failing on gcc 4.8
-if(CMAKE_COMPILER_IS_GNUCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
+else()
 absl_cc_test(
   NAME
     variant_exception_safety_test
diff --git a/absl/types/optional.cc b/absl/types/optional.cc
deleted file mode 100644
index 44ff8294..00000000
--- a/absl/types/optional.cc
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/types/optional.h"
-
-#ifndef ABSL_HAVE_STD_OPTIONAL
-namespace absl {
-
-nullopt_t::init_t nullopt_t::init;
-extern const nullopt_t nullopt{nullopt_t::init};
-
-}  // namespace absl
-#endif  // ABSL_HAVE_STD_OPTIONAL
diff --git a/absl/types/optional.h b/absl/types/optional.h
index f0ae9a17..6806160d 100644
--- a/absl/types/optional.h
+++ b/absl/types/optional.h
@@ -61,6 +61,7 @@ using std::nullopt;
 #include <utility>
 
 #include "absl/base/attributes.h"
+#include "absl/base/internal/inline_variable.h"
 #include "absl/meta/type_traits.h"
 #include "absl/types/bad_optional_access.h"
 
@@ -126,32 +127,30 @@ namespace absl {
 template <typename T>
 class optional;
 
+namespace optional_internal {
+
+// This tag type is used as a constructor parameter type for `nullopt_t`.
+struct init_t {
+  explicit init_t() = default;
+};
+
+}  // namespace optional_internal
+
 // nullopt_t
 //
 // Class type for `absl::nullopt` used to indicate an `absl::optional<T>` type
 // that does not contain a value.
 struct nullopt_t {
-  struct init_t {};
-  static init_t init;
-
   // It must not be default-constructible to avoid ambiguity for opt = {}.
-  // Note the non-const reference, which is to eliminate ambiguity for code
-  // like:
-  //
-  // struct S { int value; };
-  //
-  // void Test() {
-  //   optional<S> opt;
-  //   opt = {{}};
-  // }
-  explicit constexpr nullopt_t(init_t& /*unused*/) {}
+  explicit constexpr nullopt_t(optional_internal::init_t) noexcept {}
 };
 
 // nullopt
 //
 // A tag constant of type `absl::nullopt_t` used to indicate an empty
 // `absl::optional` in certain functions, such as construction or assignment.
-extern const nullopt_t nullopt;
+ABSL_INTERNAL_INLINE_CONSTEXPR(nullopt_t, nullopt,
+                               nullopt_t(optional_internal::init_t()));
 
 namespace optional_internal {
 
diff --git a/absl/types/optional_test.cc b/absl/types/optional_test.cc
index 0665488e..897c183a 100644
--- a/absl/types/optional_test.cc
+++ b/absl/types/optional_test.cc
@@ -179,15 +179,7 @@ TEST(optionalTest, DefaultConstructor) {
 TEST(optionalTest, nulloptConstructor) {
   absl::optional<int> empty(absl::nullopt);
   EXPECT_FALSE(empty);
-
-#ifdef ABSL_HAVE_STD_OPTIONAL
   constexpr absl::optional<int> cempty{absl::nullopt};
-#else
-  // Creating a temporary absl::nullopt_t object instead of using absl::nullopt
-  // because absl::nullopt cannot be constexpr and have external linkage at the
-  // same time.
-  constexpr absl::optional<int> cempty{absl::nullopt_t(absl::nullopt_t::init)};
-#endif
   static_assert(!cempty.has_value(), "");
   EXPECT_TRUE((std::is_nothrow_constructible<absl::optional<int>,
                                              absl::nullopt_t>::value));
diff --git a/absl/types/span.h b/absl/types/span.h
index d7f48d9f..e5c4fe1e 100644
--- a/absl/types/span.h
+++ b/absl/types/span.h
@@ -73,9 +73,6 @@
 
 namespace absl {
 
-template <typename T>
-class Span;
-
 namespace span_internal {
 // A constexpr min function
 constexpr size_t Min(size_t a, size_t b) noexcept { return a < b ? a : b; }
@@ -133,14 +130,16 @@ template <typename T>
 using EnableIfMutable =
     typename std::enable_if<!std::is_const<T>::value, int>::type;
 
-template <typename T>
-bool EqualImpl(Span<T> a, Span<T> b) {
+template <template <typename> class SpanT, typename T>
+bool EqualImpl(SpanT<T> a, SpanT<T> b) {
   static_assert(std::is_const<T>::value, "");
   return absl::equal(a.begin(), a.end(), b.begin(), b.end());
 }
 
-template <typename T>
-bool LessThanImpl(Span<T> a, Span<T> b) {
+template <template <typename> class SpanT, typename T>
+bool LessThanImpl(SpanT<T> a, SpanT<T> b) {
+  // We can't use value_type since that is remove_cv_t<T>, so we go the long way
+  // around.
   static_assert(std::is_const<T>::value, "");
   return std::lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
 }
@@ -165,8 +164,8 @@ struct IsConvertible : IsConvertibleHelper<From, To>::type {};
 // TODO(zhangxy): replace `IsConvertible` with `std::is_convertible` once the
 // older version of libcxx is not supported.
 template <typename From, typename To>
-using EnableIfConvertibleToSpanConst =
-    typename std::enable_if<IsConvertible<From, Span<const To>>::value>::type;
+using EnableIfConvertibleTo =
+    typename std::enable_if<IsConvertible<From, To>::value>::type;
 }  // namespace span_internal
 
 //------------------------------------------------------------------------------
@@ -551,25 +550,27 @@ const typename Span<T>::size_type Span<T>::npos;
 // operator==
 template <typename T>
 bool operator==(Span<T> a, Span<T> b) {
-  return span_internal::EqualImpl<const T>(a, b);
+  return span_internal::EqualImpl<Span, const T>(a, b);
 }
 template <typename T>
 bool operator==(Span<const T> a, Span<T> b) {
-  return span_internal::EqualImpl<const T>(a, b);
+  return span_internal::EqualImpl<Span, const T>(a, b);
 }
 template <typename T>
 bool operator==(Span<T> a, Span<const T> b) {
-  return span_internal::EqualImpl<const T>(a, b);
+  return span_internal::EqualImpl<Span, const T>(a, b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator==(const U& a, Span<T> b) {
-  return span_internal::EqualImpl<const T>(a, b);
+  return span_internal::EqualImpl<Span, const T>(a, b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator==(Span<T> a, const U& b) {
-  return span_internal::EqualImpl<const T>(a, b);
+  return span_internal::EqualImpl<Span, const T>(a, b);
 }
 
 // operator!=
@@ -585,13 +586,15 @@ template <typename T>
 bool operator!=(Span<T> a, Span<const T> b) {
   return !(a == b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator!=(const U& a, Span<T> b) {
   return !(a == b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator!=(Span<T> a, const U& b) {
   return !(a == b);
 }
@@ -599,25 +602,27 @@ bool operator!=(Span<T> a, const U& b) {
 // operator<
 template <typename T>
 bool operator<(Span<T> a, Span<T> b) {
-  return span_internal::LessThanImpl<const T>(a, b);
+  return span_internal::LessThanImpl<Span, const T>(a, b);
 }
 template <typename T>
 bool operator<(Span<const T> a, Span<T> b) {
-  return span_internal::LessThanImpl<const T>(a, b);
+  return span_internal::LessThanImpl<Span, const T>(a, b);
 }
 template <typename T>
 bool operator<(Span<T> a, Span<const T> b) {
-  return span_internal::LessThanImpl<const T>(a, b);
+  return span_internal::LessThanImpl<Span, const T>(a, b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator<(const U& a, Span<T> b) {
-  return span_internal::LessThanImpl<const T>(a, b);
+  return span_internal::LessThanImpl<Span, const T>(a, b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator<(Span<T> a, const U& b) {
-  return span_internal::LessThanImpl<const T>(a, b);
+  return span_internal::LessThanImpl<Span, const T>(a, b);
 }
 
 // operator>
@@ -633,13 +638,15 @@ template <typename T>
 bool operator>(Span<T> a, Span<const T> b) {
   return b < a;
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator>(const U& a, Span<T> b) {
   return b < a;
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator>(Span<T> a, const U& b) {
   return b < a;
 }
@@ -657,13 +664,15 @@ template <typename T>
 bool operator<=(Span<T> a, Span<const T> b) {
   return !(b < a);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator<=(const U& a, Span<T> b) {
   return !(b < a);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator<=(Span<T> a, const U& b) {
   return !(b < a);
 }
@@ -681,13 +690,15 @@ template <typename T>
 bool operator>=(Span<T> a, Span<const T> b) {
   return !(a < b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator>=(const U& a, Span<T> b) {
   return !(a < b);
 }
-template <typename T, typename U,
-          typename = span_internal::EnableIfConvertibleToSpanConst<U, T>>
+template <
+    typename T, typename U,
+    typename = span_internal::EnableIfConvertibleTo<U, absl::Span<const T>>>
 bool operator>=(Span<T> a, const U& b) {
   return !(a < b);
 }
diff --git a/absl/utility/BUILD.bazel b/absl/utility/BUILD.bazel
index 5185ccd8..d41317e3 100644
--- a/absl/utility/BUILD.bazel
+++ b/absl/utility/BUILD.bazel
@@ -1,6 +1,7 @@
 load(
     "//absl:copts/configure_copts.bzl",
     "ABSL_DEFAULT_COPTS",
+    "ABSL_DEFAULT_LINKOPTS",
     "ABSL_TEST_COPTS",
 )
 
@@ -12,6 +13,7 @@ cc_library(
     name = "utility",
     hdrs = ["utility.h"],
     copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         "//absl/base:base_internal",
         "//absl/base:config",
@@ -23,6 +25,7 @@ cc_test(
     name = "utility_test",
     srcs = ["utility_test.cc"],
     copts = ABSL_TEST_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":utility",
         "//absl/base:core_headers",