Export of internal Abseil changes.

--
5a5dba4252e764e6737070bf0a31074bf23a3b41 by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 244898913

--
3eb7d5b445ffbf08a104e39cd15aecf568417333 by Matt Calabrese <calabrese@google.com>:

Introduce absl::is_trivially_move_constructible and absl::is_trivially_move_assignable, and update the absl::is_trivially_copy_constructible and absl::is_trivially_copy_assignable traits to use similar techniques (should now be closer to the standard behavior).

PiperOrigin-RevId: 244859015

--
7da05a24fa786cab3985de0c39a186d73dcbcfb5 by Abseil Team <absl-team@google.com>:

Fix misspellings in comments in raw_hash_set.h.

PiperOrigin-RevId: 244754700

--
5c057be96048f21473d5ec45005ab4dcd8dd354f by Derek Mauro <dmauro@google.com>:

Internal change

PiperOrigin-RevId: 244744239

--
592394e3c2e98f1238d3fb6fcb0d20c3e3739ba9 by Derek Mauro <dmauro@google.com>:

Limit the raw_hash_set prefetch test to x86-64.

PiperOrigin-RevId: 244737534

--
99ebe4e003633c8ff7838b035b31a827994879ef by Derek Mauro <dmauro@google.com>:

Workaround warning 4091 in an MSVC header.

PiperOrigin-RevId: 244701744

--
0aa23f09a32efe7985ee55b0217190f08da42477 by Abseil Team <absl-team@google.com>:

Fix comment typo.

PiperOrigin-RevId: 244659371

--
c6cdb87e9f28062c8daa29b3d8d68182ecc16383 by Derek Mauro <dmauro@google.com>:

Fix -Wundef warnings and support -Wundef.

PiperOrigin-RevId: 244244968

--
06b81245f7696b20c3c63b0618d33ac25e29cad6 by Abseil Team <absl-team@google.com>:

Fix a typo in inlined_vector.h.

PiperOrigin-RevId: 244230809

--
94877a2125d2cfe837384240e4d6551f39d737e4 by Greg Falcon <gfalcon@google.com>:

Fix sysinfo_test for emscripten.

PiperOrigin-RevId: 244198804

--
ec7783531ef7f9df2da37d341d61f7cb2bf843f0 by Shaindel Schwartz <shaindel@google.com>:

Import of CCTZ from GitHub.

Fixes #291.

PiperOrigin-RevId: 244184598

--
b652c14fa95ea206c217487ee713b11f5d1762b3 by Matt Calabrese <calabrese@google.com>:

Emulate the `in_place_index` and `in_place_type` variable templates such that they are syntactically usable in C++11 with `any` and `variant`. Also pull in the variable templates from namespace std when available.

The main observable differences here are:

1)
The types of `in_place_index_t<I>` and `in_place_type_t<T>` become function pointer types rather than structs when using the implementation that is not an alias of the std equivalents.

2)
The types of `in_place_index<I>` and `in_place_type<T>` are not directly `in_place_index_t<I>` and `in_place_type_t<T>`, but rather they become function types that decay to the corresponding function pointer types.

3)
The default constructor for `in_place_index_t` and `in_place_type_t` instantiations is no longer explicit, but for these templates I think that's less important than for something like `in_place_t` since the _type_t and _index_t versions basically never have their template parameter non-deduced when participating in overload resolution with conflicting candidates.

4) While idiomatic usage of `in_place_type_t` and `in_place_index_t` with std::variant and std::any should not be affected, there is the possibility that strange, non-idiomatic uses may be affected in the wild.

5) Default construction (rather than value-initialization) leads to a default-constructed pointer.

PiperOrigin-RevId: 244180003

--
b9ac5a96581837ffa24532117b7ea302a5569751 by Derek Mauro <dmauro@google.com>:

Fix MSVC debug assertion.

isprint is undefined for values not representable as unsigned char or
EOF.

PiperOrigin-RevId: 244083005

--
41758be6137c2f25e84b50f23938e49484be2903 by Shaindel Schwartz <shaindel@google.com>:

Update config settings for Apple platforms.

PiperOrigin-RevId: 244040587

--
c90df6a26db94b0305a0c954455a621542a89d91 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 244024427

--
c71e9ceb89495354eca7d02bd905ffeaa9029aec by Derek Mauro <dmauro@google.com>:

Adds missing ABSL_DEFAULT_COPTS and ABSL_TEST_COPTS to CMakeLists.txt

Don't error on deprecated declarations in tests. It is completely
reasonable to test that code marked deprecated still works.

PiperOrigin-RevId: 244003941

--
e1326a96527a8ba9b8d120161545260da9c4562e by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 243990623

--
90b8e12934c7711e1bfcc0117d21288bf9220dee by Abseil Team <absl-team@google.com>:

Add variation of absl::Base64Escape/WebSafeBase64Escape that directly returns its result.

PiperOrigin-RevId: 243894308

--
317fef3344481ebc5c35712d42f5d8a0fa64dff4 by Abseil Team <absl-team@google.com>:

Enable raw logging in Emscripten builds.

PiperOrigin-RevId: 243893705
GitOrigin-RevId: 5a5dba4252e764e6737070bf0a31074bf23a3b41
Change-Id: I19293aab73cc98d9e9bf6a9fdc30819764adb9db

4 files changed, 41 insertions, 5 deletions

diff --git a/absl/base/CMakeLists.txt b/absl/base/CMakeLists.txt
index 5042f156..b9f35bc0 100644
--- a/absl/base/CMakeLists.txt
+++ b/absl/base/CMakeLists.txt
@@ -26,6 +26,8 @@ absl_cc_library(
     "internal/spinlock_posix.inc"
     "internal/spinlock_wait.cc"
     "internal/spinlock_win32.inc"
+  COPTS
+    ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::core_headers
 )
@@ -221,6 +223,8 @@ absl_cc_test(
     atomic_hook_test
   SRCS
     "internal/atomic_hook_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::core_headers
@@ -232,6 +236,8 @@ absl_cc_test(
     bit_cast_test
   SRCS
     "bit_cast_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::core_headers
@@ -243,6 +249,8 @@ absl_cc_test(
     throw_delegate_test
   SRCS
     "throw_delegate_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::throw_delegate
@@ -257,6 +265,8 @@ absl_cc_test(
     "inline_variable_test.cc"
     "inline_variable_test_a.cc"
     "inline_variable_test_b.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base_internal
     gtest_main
@@ -267,6 +277,8 @@ absl_cc_test(
     invoke_test
   SRCS
     "invoke_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base_internal
     absl::memory
@@ -297,6 +309,8 @@ absl_cc_test(
     spinlock_test
   SRCS
     "spinlock_test_common.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::core_headers
@@ -324,6 +338,8 @@ absl_cc_test(
     endian_test
   SRCS
     "internal/endian_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::config
@@ -336,6 +352,8 @@ absl_cc_test(
     config_test
   SRCS
     "config_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::config
     absl::synchronization
@@ -347,6 +365,8 @@ absl_cc_test(
     call_once_test
   SRCS
     "call_once_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::core_headers
@@ -359,6 +379,8 @@ absl_cc_test(
     raw_logging_test
   SRCS
     "raw_logging_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::strings
@@ -370,6 +392,8 @@ absl_cc_test(
     sysinfo_test
   SRCS
     "internal/sysinfo_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::synchronization
@@ -381,6 +405,8 @@ absl_cc_test(
     low_level_alloc_test
   SRCS
     "internal/low_level_alloc_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::malloc_internal
     Threads::Threads
@@ -391,6 +417,8 @@ absl_cc_test(
     thread_identity_test
   SRCS
     "internal/thread_identity_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
     absl::core_headers
@@ -415,6 +443,8 @@ absl_cc_test(
     bits_test
   SRCS
     "internal/bits_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::bits
     gtest_main
@@ -438,6 +468,8 @@ absl_cc_test(
     scoped_set_env_test
   SRCS
     "internal/scoped_set_env_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::scoped_set_env
     gtest_main
@@ -448,6 +480,8 @@ absl_cc_test(
     cmake_thread_test
   SRCS
     "internal/cmake_thread_test.cc"
+  COPTS
+    ${ABSL_TEST_COPTS}
   DEPS
     absl::base
 )
diff --git a/absl/base/internal/raw_logging.cc b/absl/base/internal/raw_logging.cc
index b5a05e8c..878fe6c6 100644
--- a/absl/base/internal/raw_logging.cc
+++ b/absl/base/internal/raw_logging.cc
@@ -36,7 +36,8 @@
 // This preprocessor token is also defined in raw_io.cc.  If you need to copy
 // this, consider moving both to config.h instead.
 #if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
-    defined(__Fuchsia__) || defined(__native_client__)
+    defined(__Fuchsia__) || defined(__native_client__) || \
+    defined(__EMSCRIPTEN__)
 #include <unistd.h>
 
 
diff --git a/absl/base/internal/sysinfo_test.cc b/absl/base/internal/sysinfo_test.cc
index 247f3d88..82bbcc2b 100644
--- a/absl/base/internal/sysinfo_test.cc
+++ b/absl/base/internal/sysinfo_test.cc
@@ -37,12 +37,12 @@ TEST(SysinfoTest, NumCPUs) {
 }
 
 TEST(SysinfoTest, NominalCPUFrequency) {
-#if !(defined(__aarch64__) && defined(__linux__))
+#if !(defined(__aarch64__) && defined(__linux__)) && !defined(__EMSCRIPTEN__)
   EXPECT_GE(NominalCPUFrequency(), 1000.0)
       << "NominalCPUFrequency() did not return a reasonable value";
 #else
-  // TODO(absl-team): Aarch64 cannot read the CPU frequency from sysfs, so we
-  // get back 1.0. Fix once the value is available.
+  // Aarch64 cannot read the CPU frequency from sysfs, so we get back 1.0.
+  // Emscripten does not have a sysfs to read from at all.
   EXPECT_EQ(NominalCPUFrequency(), 1.0)
       << "CPU frequency detection was fixed! Please update unittest.";
 #endif
diff --git a/absl/base/internal/unscaledcycleclock.h b/absl/base/internal/unscaledcycleclock.h
index 58950cc2..2d361e96 100644
--- a/absl/base/internal/unscaledcycleclock.h
+++ b/absl/base/internal/unscaledcycleclock.h
@@ -59,7 +59,8 @@
 // CycleClock that runs at atleast 1 MHz. We've found some Android
 // ARM64 devices where this is not the case, so we disable it by
 // default on Android ARM64.
-#if defined(__native_client__) || TARGET_OS_IPHONE || \
+#if defined(__native_client__) ||                      \
+    (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) || \
     (defined(__ANDROID__) && defined(__aarch64__))
 #define ABSL_USE_UNSCALED_CYCLECLOCK_DEFAULT 0
 #else