[webrtc] Add a new port

ports/webrtc/absl-labels.txt

@@ -0,0 +1,208 @@
+//third_party/abseil-cpp:absl
+//third_party/abseil-cpp:absl_component_deps
+//third_party/abseil-cpp/absl/algorithm:algorithm
+//third_party/abseil-cpp/absl/algorithm:container
+//third_party/abseil-cpp/absl/base:atomic_hook
+//third_party/abseil-cpp/absl/base:base
+//third_party/abseil-cpp/absl/base:base_internal
+//third_party/abseil-cpp/absl/base:config
+//third_party/abseil-cpp/absl/base:core_headers
+//third_party/abseil-cpp/absl/base:cycleclock_internal
+//third_party/abseil-cpp/absl/base:dynamic_annotations
+//third_party/abseil-cpp/absl/base:endian
+//third_party/abseil-cpp/absl/base:errno_saver
+//third_party/abseil-cpp/absl/base:fast_type_id
+//third_party/abseil-cpp/absl/base:iterator_traits_internal
+//third_party/abseil-cpp/absl/base:log_severity
+//third_party/abseil-cpp/absl/base:malloc_internal
+//third_party/abseil-cpp/absl/base:no_destructor
+//third_party/abseil-cpp/absl/base:nullability
+//third_party/abseil-cpp/absl/base:nullability_traits_internal
+//third_party/abseil-cpp/absl/base:prefetch
+//third_party/abseil-cpp/absl/base:raw_logging_internal
+//third_party/abseil-cpp/absl/base:spinlock_wait
+//third_party/abseil-cpp/absl/base:strerror
+//third_party/abseil-cpp/absl/base:throw_delegate
+//third_party/abseil-cpp/absl/base:tracing_internal
+//third_party/abseil-cpp/absl/cleanup:cleanup
+//third_party/abseil-cpp/absl/cleanup:cleanup_internal
+//third_party/abseil-cpp/absl/container:btree
+//third_party/abseil-cpp/absl/container:common
+//third_party/abseil-cpp/absl/container:common_policy_traits
+//third_party/abseil-cpp/absl/container:compressed_tuple
+//third_party/abseil-cpp/absl/container:container_memory
+//third_party/abseil-cpp/absl/container:fixed_array
+//third_party/abseil-cpp/absl/container:flat_hash_map
+//third_party/abseil-cpp/absl/container:flat_hash_set
+//third_party/abseil-cpp/absl/container:hash_container_defaults
+//third_party/abseil-cpp/absl/container:hash_function_defaults
+//third_party/abseil-cpp/absl/container:hash_policy_traits
+//third_party/abseil-cpp/absl/container:hashtable_control_bytes
+//third_party/abseil-cpp/absl/container:hashtable_debug_hooks
+//third_party/abseil-cpp/absl/container:hashtablez_sampler
+//third_party/abseil-cpp/absl/container:inlined_vector
+//third_party/abseil-cpp/absl/container:inlined_vector_internal
+//third_party/abseil-cpp/absl/container:layout
+//third_party/abseil-cpp/absl/container:linked_hash_map
+//third_party/abseil-cpp/absl/container:linked_hash_set
+//third_party/abseil-cpp/absl/container:node_hash_map
+//third_party/abseil-cpp/absl/container:node_hash_set
+//third_party/abseil-cpp/absl/container:node_slot_policy
+//third_party/abseil-cpp/absl/container:raw_hash_map
+//third_party/abseil-cpp/absl/container:raw_hash_set
+//third_party/abseil-cpp/absl/container:raw_hash_set_resize_impl
+//third_party/abseil-cpp/absl/crc:cpu_detect
+//third_party/abseil-cpp/absl/crc:crc32c
+//third_party/abseil-cpp/absl/crc:crc_cord_state
+//third_party/abseil-cpp/absl/crc:crc_internal
+//third_party/abseil-cpp/absl/crc:non_temporal_arm_intrinsics
+//third_party/abseil-cpp/absl/crc:non_temporal_memcpy
+//third_party/abseil-cpp/absl/debugging:bounded_utf8_length_sequence
+//third_party/abseil-cpp/absl/debugging:debugging_internal
+//third_party/abseil-cpp/absl/debugging:decode_rust_punycode
+//third_party/abseil-cpp/absl/debugging:demangle_internal
+//third_party/abseil-cpp/absl/debugging:demangle_rust
+//third_party/abseil-cpp/absl/debugging:examine_stack
+//third_party/abseil-cpp/absl/debugging:failure_signal_handler
+//third_party/abseil-cpp/absl/debugging:leak_check
+//third_party/abseil-cpp/absl/debugging:stacktrace
+//third_party/abseil-cpp/absl/debugging:symbolize
+//third_party/abseil-cpp/absl/debugging:utf8_for_code_point
+//third_party/abseil-cpp/absl/functional:any_invocable
+//third_party/abseil-cpp/absl/functional:bind_front
+//third_party/abseil-cpp/absl/functional:function_ref
+//third_party/abseil-cpp/absl/functional:overload
+//third_party/abseil-cpp/absl/hash:city
+//third_party/abseil-cpp/absl/hash:hash
+//third_party/abseil-cpp/absl/hash:weakly_mixed_integer
+//third_party/abseil-cpp/absl/log/internal:append_truncated
+//third_party/abseil-cpp/absl/log/internal:check_impl
+//third_party/abseil-cpp/absl/log/internal:check_op
+//third_party/abseil-cpp/absl/log/internal:conditions
+//third_party/abseil-cpp/absl/log/internal:config
+//third_party/abseil-cpp/absl/log/internal:fnmatch
+//third_party/abseil-cpp/absl/log/internal:format
+//third_party/abseil-cpp/absl/log/internal:globals
+//third_party/abseil-cpp/absl/log/internal:log_impl
+//third_party/abseil-cpp/absl/log/internal:log_message
+//third_party/abseil-cpp/absl/log/internal:log_sink_set
+//third_party/abseil-cpp/absl/log/internal:nullguard
+//third_party/abseil-cpp/absl/log/internal:nullstream
+//third_party/abseil-cpp/absl/log/internal:proto
+//third_party/abseil-cpp/absl/log/internal:strip
+//third_party/abseil-cpp/absl/log/internal:structured_proto
+//third_party/abseil-cpp/absl/log/internal:vlog_config
+//third_party/abseil-cpp/absl/log/internal:voidify
+//third_party/abseil-cpp/absl/log:absl_check
+//third_party/abseil-cpp/absl/log:absl_log
+//third_party/abseil-cpp/absl/log:absl_vlog_is_on
+//third_party/abseil-cpp/absl/log:die_if_null
+//third_party/abseil-cpp/absl/log:globals
+//third_party/abseil-cpp/absl/log:initialize
+//third_party/abseil-cpp/absl/log:log
+//third_party/abseil-cpp/absl/log:log_entry
+//third_party/abseil-cpp/absl/log:log_sink
+//third_party/abseil-cpp/absl/log:log_sink_registry
+//third_party/abseil-cpp/absl/log:vlog_is_on
+//third_party/abseil-cpp/absl/memory:memory
+//third_party/abseil-cpp/absl/meta:type_traits
+//third_party/abseil-cpp/absl/numeric:bits
+//third_party/abseil-cpp/absl/numeric:int128
+//third_party/abseil-cpp/absl/numeric:representation
+//third_party/abseil-cpp/absl/profiling:exponential_biased
+//third_party/abseil-cpp/absl/profiling:sample_recorder
+//third_party/abseil-cpp/absl/random/internal:distribution_caller
+//third_party/abseil-cpp/absl/random/internal:entropy_pool
+//third_party/abseil-cpp/absl/random/internal:fast_uniform_bits
+//third_party/abseil-cpp/absl/random/internal:fastmath
+//third_party/abseil-cpp/absl/random/internal:generate_real
+//third_party/abseil-cpp/absl/random/internal:iostream_state_saver
+//third_party/abseil-cpp/absl/random/internal:nonsecure_base
+//third_party/abseil-cpp/absl/random/internal:pcg_engine
+//third_party/abseil-cpp/absl/random/internal:platform
+//third_party/abseil-cpp/absl/random/internal:randen
+//third_party/abseil-cpp/absl/random/internal:randen_engine
+//third_party/abseil-cpp/absl/random/internal:randen_hwaes
+//third_party/abseil-cpp/absl/random/internal:randen_hwaes_impl
+//third_party/abseil-cpp/absl/random/internal:randen_slow
+//third_party/abseil-cpp/absl/random/internal:salted_seed_seq
+//third_party/abseil-cpp/absl/random/internal:seed_material
+//third_party/abseil-cpp/absl/random/internal:traits
+//third_party/abseil-cpp/absl/random/internal:uniform_helper
+//third_party/abseil-cpp/absl/random/internal:wide_multiply
+//third_party/abseil-cpp/absl/random:bit_gen_ref
+//third_party/abseil-cpp/absl/random:distributions
+//third_party/abseil-cpp/absl/random:random
+//third_party/abseil-cpp/absl/random:seed_gen_exception
+//third_party/abseil-cpp/absl/random:seed_sequences
+//third_party/abseil-cpp/absl/status:status
+//third_party/abseil-cpp/absl/status:statusor
+//third_party/abseil-cpp/absl/strings:append_and_overwrite
+//third_party/abseil-cpp/absl/strings:charset
+//third_party/abseil-cpp/absl/strings:cord
+//third_party/abseil-cpp/absl/strings:cord_internal
+//third_party/abseil-cpp/absl/strings:cordz_functions
+//third_party/abseil-cpp/absl/strings:cordz_handle
+//third_party/abseil-cpp/absl/strings:cordz_info
+//third_party/abseil-cpp/absl/strings:cordz_statistics
+//third_party/abseil-cpp/absl/strings:cordz_update_scope
+//third_party/abseil-cpp/absl/strings:cordz_update_tracker
+//third_party/abseil-cpp/absl/strings:has_ostream_operator
+//third_party/abseil-cpp/absl/strings:internal
+//third_party/abseil-cpp/absl/strings:resize_and_overwrite
+//third_party/abseil-cpp/absl/strings:str_format
+//third_party/abseil-cpp/absl/strings:str_format_internal
+//third_party/abseil-cpp/absl/strings:string_view
+//third_party/abseil-cpp/absl/strings:strings
+//third_party/abseil-cpp/absl/synchronization:graphcycles_internal
+//third_party/abseil-cpp/absl/synchronization:kernel_timeout_internal
+//third_party/abseil-cpp/absl/synchronization:synchronization
+//third_party/abseil-cpp/absl/time/internal/cctz:civil_time
+//third_party/abseil-cpp/absl/time/internal/cctz:time_zone
+//third_party/abseil-cpp/absl/time:clock_interface
+//third_party/abseil-cpp/absl/time:time
+//third_party/abseil-cpp/absl/types:compare
+//third_party/abseil-cpp/absl/types:optional
+//third_party/abseil-cpp/absl/types:optional_ref
+//third_party/abseil-cpp/absl/types:source_location
+//third_party/abseil-cpp/absl/types:span
+//third_party/abseil-cpp/absl/types:variant
+//third_party/abseil-cpp/absl/utility:utility
+//third_party/abseil-cpp/absl/base:exception_testing
+//third_party/abseil-cpp/absl/base:iterator_traits_test_helper
+//third_party/abseil-cpp/absl/container:hash_generator_testing
+//third_party/abseil-cpp/absl/container:hash_policy_testing
+//third_party/abseil-cpp/absl/container:test_instance_tracker
+//third_party/abseil-cpp/absl/container:unordered_map_constructor_test
+//third_party/abseil-cpp/absl/container:unordered_map_lookup_test
+//third_party/abseil-cpp/absl/container:unordered_map_members_test
+//third_party/abseil-cpp/absl/container:unordered_map_modifiers_test
+//third_party/abseil-cpp/absl/container:unordered_set_constructor_test
+//third_party/abseil-cpp/absl/container:unordered_set_lookup_test
+//third_party/abseil-cpp/absl/container:unordered_set_members_test
+//third_party/abseil-cpp/absl/container:unordered_set_modifiers_test
+//third_party/abseil-cpp/absl/flags:absl_flags_config
+//third_party/abseil-cpp/absl/flags:config
+//third_party/abseil-cpp/absl/flags:flag
+//third_party/abseil-cpp/absl/flags:marshalling
+//third_party/abseil-cpp/absl/flags:parse
+//third_party/abseil-cpp/absl/flags:program_name
+//third_party/abseil-cpp/absl/flags:reflection
+//third_party/abseil-cpp/absl/flags:usage
+//third_party/abseil-cpp/absl/hash:hash_testing
+//third_party/abseil-cpp/absl/log/internal:container
+//third_party/abseil-cpp/absl/log/internal:flags
+//third_party/abseil-cpp/absl/log/internal:structured
+//third_party/abseil-cpp/absl/log/internal:test_actions
+//third_party/abseil-cpp/absl/log/internal:test_helpers
+//third_party/abseil-cpp/absl/log/internal:test_matchers
+//third_party/abseil-cpp/absl/log:check
+//third_party/abseil-cpp/absl/meta:requires
+//third_party/abseil-cpp/absl/random/internal:distribution_test_util
+//third_party/abseil-cpp/absl/random/internal:mock_helpers
+//third_party/abseil-cpp/absl/random/internal:mock_overload_set
+//third_party/abseil-cpp/absl/random/internal:mock_validators
+//third_party/abseil-cpp/absl/random:mocking_bit_gen
+//third_party/abseil-cpp/absl/strings:cord_test_helpers
+//third_party/abseil-cpp/absl/synchronization:thread_pool
+//third_party/abseil-cpp/absl/types:any

ports/webrtc/build-0001-drop-module-deps-from-toolchain-invocations.patch

@@ -0,0 +1,66 @@
+diff --git a/toolchain/apple/toolchain.gni b/toolchain/apple/toolchain.gni
+index dd2722015..f6b7a4486 100644
+--- a/toolchain/apple/toolchain.gni
++++ b/toolchain/apple/toolchain.gni
+@@ -470,7 +470,7 @@ template("single_apple_toolchain") {
+     tool("cxx") {
+       depfile = "{{output}}.d"
+       precompiled_header_type = "gcc"
+-      command = "$coverage_wrapper$cxx $md -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{module_deps_no_self}} -c {{source}} -o {{output}}"
++      command = "$coverage_wrapper$cxx $md -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
+       depsformat = "gcc"
+       description = "CXX {{output}}"
+       outputs = [ "$object_subdir/{{source_name_part}}.o" ]
+@@ -482,7 +482,7 @@ template("single_apple_toolchain") {
+
+       # Module file doesn't need coverage instrumentation because module files
+       # represent interfaces rather than implementations.
+-      command = "$cxx -MD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{module_deps_no_self}} -fmodule-name={{cc_module_name}} -c -x c++ -Xclang -emit-module {{source}} -o {{output}}"
++      command = "this-should-never-run"
+       depsformat = "gcc"
+       description = "CXX_MODULE {{output}}"
+       outputs = [ "$object_subdir/{{source_name_part}}.pcm" ]
+diff --git a/toolchain/gcc_toolchain.gni b/toolchain/gcc_toolchain.gni
+index a22678bb1..eb5db24c9 100644
+--- a/toolchain/gcc_toolchain.gni
++++ b/toolchain/gcc_toolchain.gni
+@@ -332,7 +332,7 @@ template("single_gcc_toolchain") {
+     tool("cxx") {
+       depfile = "{{output}}.d"
+       precompiled_header_type = "gcc"
+-      command = "$coverage_wrapper$cxx $md -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}${extra_cppflags}${extra_cxxflags} {{module_deps_no_self}} -c {{source}} -o {{output}}"
++      command = "$coverage_wrapper$cxx $md -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}${extra_cppflags}${extra_cxxflags} -c {{source}} -o {{output}}"
+       depsformat = "gcc"
+       description = "CXX {{output}}"
+       outputs = [ "$object_subdir/{{source_name_part}}.o" ]
+@@ -343,7 +343,7 @@ template("single_gcc_toolchain") {
+
+       # Module file doesn't need coverage instrumentation because module files
+       # represent interfaces rather than implementations.
+-      command = "$cxx -MD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}${extra_cppflags}${extra_cxxflags} {{module_deps_no_self}} -fmodule-name={{cc_module_name}} -x c++ -Xclang -emit-module -c {{source}} -o {{output}}"
++      command = "this-should-never-run"
+       depsformat = "gcc"
+       description = "CXX_MODULE {{output}}"
+       outputs = [ "$object_subdir/{{source_name_part}}.pcm" ]
+diff --git a/toolchain/win/toolchain.gni b/toolchain/win/toolchain.gni
+index 8d0b87816..dbefdda0b 100644
+--- a/toolchain/win/toolchain.gni
++++ b/toolchain/win/toolchain.gni
+@@ -239,7 +239,7 @@ template("msvc_toolchain") {
+       depsformat = "msvc"
+       description = "CXX_MODULE {{output}}"
+       outputs = [ "$object_subdir/{{source_name_part}}.pcm" ]
+-      command = "$env_wrapper$cl /Fo{{output}} /nologo $show_includes $sys_include_flags{{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{module_deps_no_self}} /Fd\"$pdbname\" -fmodule-name={{cc_module_name}} /c -x c++ -Xclang -emit-module {{source}}"
++      command = "this-should-never-run"
+     }
+
+     tool("cxx") {
+@@ -255,7 +255,7 @@ template("msvc_toolchain") {
+
+       # Note that the code coverage wrapper scripts assumes that {{source}}
+       # comes immediately after /c.
+-      command = "$coverage_wrapper$env_wrapper$cl /c {{source}} /Fo{{output}} /nologo $show_includes $sys_include_flags{{defines}} {{include_dirs}} {{cflags}} /TP {{cflags_cc}} {{module_deps_no_self}} /Fd\"$pdbname\""
++      command = "$coverage_wrapper$env_wrapper$cl /c {{source}} /Fo{{output}} /nologo $show_includes $sys_include_flags{{defines}} {{include_dirs}} {{cflags}} /TP {{cflags_cc}} /Fd\"$pdbname\""
+     }
+
+     tool("rc") {

ports/webrtc/build-0002-fix-apple-arflags-usage.patch

@@ -0,0 +1,18 @@
+diff --git a/toolchain/apple/toolchain.gni b/toolchain/apple/toolchain.gni
+index dd2722015..122773617 100644
+--- a/toolchain/apple/toolchain.gni
++++ b/toolchain/apple/toolchain.gni
+@@ -528,11 +528,11 @@ template("single_apple_toolchain") {
+
+         # Apple's libtool fails if the response file is empty (e.g., for empty targets).
+         # We work around this by writing a dummy archive with the ar magic number.
+-        command = "rm -f {{output}} && if [ -s \"$rspfile\" ]; then TOOL_VERSION=${tool_versions.filter_libtool} $python_path $script $libtool -static -D {{arflags}} -o {{output}} @$rspfile; else printf '!<arch>\n' > {{output}}; fi"
++        command = "rm -f {{output}} && if [ -s \"$rspfile\" ]; then TOOL_VERSION=${tool_versions.filter_libtool} $python_path $script $libtool -static {{arflags}} -o {{output}} @$rspfile; else printf '!<arch>\n' > {{output}}; fi"
+         description = "LIBTOOL-STATIC {{output}}"
+       } else {
+         ar = "${prefix}llvm-ar"
+-        command = "\"$ar\" {{arflags}} -r -c -s -D {{output}} @$rspfile"
++        command = "\"$ar\" {{arflags}} -r -c -s {{output}} @$rspfile"
+
+         # Remove the output file first so that ar doesn't try to modify the
+         # existing file.

ports/webrtc/build-0003-disable-fno-lifetime-dse.patch

@@ -0,0 +1,16 @@
+--- a/config/compiler/BUILD.gn
++++ b/config/compiler/BUILD.gn
+@@ -625,13 +625,6 @@
+       ]
+     }
+
+-    # The performance improvement does not seem worth the risk. See
+-    # https://crbug.com/484082200 for background and https://crrev.com/c/7593035
+-    # for discussion.
+-    if (!is_wasm) {
+-      cflags += [ "-fno-lifetime-dse" ]
+-    }
+-
+     # TODO(hans): Remove this once Clang generates better optimized debug info
+     # by default. https://crbug.com/765793
+     cflags += [

ports/webrtc/build-0004-disable-sanitize-c-array-bounds.patch

@@ -0,0 +1,26 @@
+--- a/config/compiler/BUILD.gn
++++ b/config/compiler/BUILD.gn
+@@ -1901,22 +1901,7 @@
+ # See also: https://crbug.com/40891132#comment10
+ config("sanitize_c_array_bounds") {
+   if (!is_ubsan && is_clang && !(is_asan && target_cpu == "x86")) {
+-    cflags = [
+-      "-fsanitize=array-bounds",
+-      "-fsanitize-trap=array-bounds",
+-
+-      # Some code users feature detection to determine if UBSAN (or any
+-      # sanitizer) is enabled, they then do expensive debug like operations. We
+-      # want to suppress this behaviour since we want to keep performance costs
+-      # as low as possible while having these checks.
+-      "-fsanitize-ignore-for-ubsan-feature=array-bounds",
+-
+-      # Because we've enabled array-bounds sanitizing we also want to suppress
+-      # the related warning about "unsafe-buffer-usage-in-static-sized-array",
+-      # since we know that the array bounds sanitizing will catch any out-of-
+-      # bounds accesses.
+-      "-Wno-unsafe-buffer-usage-in-static-sized-array",
+-    ]
++    cflags = []
+   }
+ }
+

ports/webrtc/build-0005-disable-sanitize-return.patch

@@ -0,0 +1,20 @@
+--- a/config/compiler/BUILD.gn
++++ b/config/compiler/BUILD.gn
+@@ -1925,16 +1925,7 @@
+ # `NOTREACHED()` at the end of such functions.
+ config("sanitize_return") {
+   if (!is_ubsan && is_clang) {
+-    cflags = [
+-      "-fsanitize=return",
+-      "-fsanitize-trap=return",
+-
+-      # Some code users feature detection to determine if UBSAN (or any
+-      # sanitizer) is enabled, they then do expensive debug like operations. We
+-      # want to suppress this behaviour since we want to keep performance costs
+-      # as low as possible while having these checks.
+-      "-fsanitize-ignore-for-ubsan-feature=return",
+-    ]
++    cflags = []
+   }
+ }
+

ports/webrtc/build-0006-skip-local-vs-debugger-copy.patch

@@ -0,0 +1,19 @@
+diff --git a/vs_toolchain.py b/vs_toolchain.py
+index 5d83b6c..d82417b 100644
+--- a/vs_toolchain.py
++++ b/vs_toolchain.py
+@@ -468,7 +468,10 @@ def _CopyDebugger(target_dir, target_cpu):
+   debug_files = [('dbghelp.dll', False), ('dbgcore.dll', True),
+                  ('symsrv.dll', True)]
+   for debug_file, is_optional in debug_files:
+-    full_path = os.path.join(win_sdk_dir, 'Debuggers', target_cpu, debug_file)
++    full_path = os.path.join(win_sdk_dir, 'Debuggers', target_cpu, debug_file)
++    local_toolchain = not bool(
++        int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '1'))
++    )
+     if not os.path.exists(full_path):
+-      if is_optional:
++      if is_optional or local_toolchain:
+         continue
+       else:
+         raise Exception('%s not found in "%s"\r\nYou must install '