chromium: Update to 138.0.7204.35 (scarthgap)

Chromium 138+ uses its bundled libc++ and compiler-rt. To ensure the build
system uses these and does not fall back to system-provided runtime libraries,
explicitly pass the target triple and disable system stdlib++.

This avoids linker errors caused by missing crtbeginS.o, crtendS.o, and libgcc
when using Clang with a minimal sysroot.

scarthgap branch of meta-oe ships with clang18. meta-lts-mixins with scarthgap-clang20
branch should be included in layer.conf

Release Notes:
https://chromereleases.googleblog.com/2025/07/stable-channel-update-for-desktop_15.html

Build and patch changes:
Added patches:

0011-fix-check_version-Only-compare-node.js-major-version.patch
Updated patches:

0009-Adjust-the-Rust-build-to-our-needs.patch
Removed patches:

0011-Disable-crabbyavif-to-fix-build-errors.patch
0012-Revert-Allow-and-use-std-hardware_destructive_interf.patch
0013-Revert-Set-Rust-symbol-visibility-to-hidden-when-C-s.patch
0014-pdfium-Fix-missing-PDFiumAPIStringBufferAdapter-temp.patch
0015-Revert-Connect-the-Rust-log-crate-to-the-base-loggin.patch
License changes:
Added licenses:

third_party/compiler-rt/src/LICENSE.TXT
third_party/libtess2/LICENSE
third_party/llvm-libc/src/LICENSE.TXT
third_party/net/third_party/mozilla_security_manager/LICENSE
Removed licenses:

third_party/accessibility-audit/LICENSE
third_party/io_grpc_grpc_api/LICENSE
third_party/libavifinfo/LICENSE
Updated licenses:

third_party/android_deps/libs/com_google_android_gms_play_services_auth/LICENSE → third_party/android_deps/autorolled/committed/libs/com_google_android_gms_play_services_auth/LICENSE
third_party/android_deps/libs/com_google_android_gms_play_services_auth_api_phone/LICENSE → third_party/android_deps/autorolled/committed/libs/com_google_android_gms_play_services_auth_api_phone/LICENSE
third_party/android_deps/libs/com_google_android_gms_play_services_auth_base/LICENSE → third_party/android_deps/autorolled/committed/libs/com_google_android_gms_play_services_auth_base/LICENSE
third_party/android_deps/libs/com_google_android_gms_play_services_auth_blockstore/LICENSE → third_party/android_deps/autorolled/committed/libs/com_google_android_gms_play_services_auth_blockstore/LICENSE
third_party/android_deps/libs/com_google_android_gms_play_services_fido/LICENSE → third_party/android_deps/autorolled/committed/libs/com_google_android_gms_play_services_fido/LICENSE
third_party/android_deps/libs/com_google_android_libraries_identity_googleid_googleid/LICENSE →
third_party/android_deps/autorolled/committed/libs/com_google_android_libraries_identity_googleid_googleid/LICENSE
third_party/expat/src/expat/COPYING
third_party/libjpeg_turbo/LICENSE
Test-built
chromium-ozone-wayland

master, clang, MACHINE=qemux86-64
chromium-x11

master, clang, MACHINE=qemux86-64, qemuarm, qemuarm64
Repo hashes (from meta-chromium-test)
meta-oe:
commit: "491671faee11ea131feab5a3a451d1a01deb2ab1"
poky:
commit: "ac257900c33754957b2696529682029d997a8f28"
meta-clang:
commit: "76596813cd0061bd9818a80926e6900af61fcaa0"
meta-lts-mixins:
commit: "96deb45139df027473faf0938fe006d33c45c375"

Author: caneraltinbasak

meta-chromium/recipes-browser/chromium/chromium-gn.inc

@@ -25,12 +25,10 @@ SRC_URI += "\
     file://0008-Use-the-correct-path-to-libclang_rt.builtins.a.patch \
     file://0009-Adjust-the-Rust-build-to-our-needs.patch \
     file://0010-Don-t-require-profiler_builtins.rlib.patch \
-    file://0011-Disable-crabbyavif-to-fix-build-errors.patch \
-    file://0012-Revert-Allow-and-use-std-hardware_destructive_interf.patch \
-    file://0013-Revert-Set-Rust-symbol-visibility-to-hidden-when-C-s.patch \
-    file://0014-pdfium-Fix-missing-PDFiumAPIStringBufferAdapter-temp.patch \
-    file://0015-Revert-Connect-the-Rust-log-crate-to-the-base-loggin.patch \
+    file://0011-fix-check_version-Only-compare-node.js-major-version.patch \
+    file://0012-chromium-fix-v4l2-compiler-error-on-arm.patch \
 "
+
 # ARM/AArch64-specific patches.
 SRC_URI:append:aarch64 = "${@bb.utils.contains('TUNE_FEATURES', 'crypto', '', ' file://arm/0001-Fix-AES-crypto-SIGILL-on-rpi4-64.patch', d)}"
 
@@ -112,7 +110,7 @@ BUILD_CC:toolchain-clang = "clang"
 BUILD_CXX:toolchain-clang = "clang++"
 BUILD_LD:toolchain-clang = "clang"
 
-PACKAGECONFIG ??= "upower use-egl"
+PACKAGECONFIG ??= "upower use-egl use-v4l2"
 
 # this makes sure the dependencies for the EGL mode are present; otherwise, the configure scripts
 # automatically and silently fall back to GLX
@@ -124,10 +122,10 @@ PACKAGECONFIG[use-egl] = ",,virtual/egl virtual/libgles2"
 # be necessary but are OK to add).
 PACKAGECONFIG[component-build] = ""
 
-# Starting with M61, Chromium defaults to building with its own copy of libc++
-# instead of the system's libstdc++. Add a knob to control this behavior
-# https://groups.google.com/a/chromium.org/d/msg/chromium-packagers/8aYO3me2SCE/SZ8pJXhZAwAJ
-PACKAGECONFIG[custom-libcxx] = "use_custom_libcxx=true,use_custom_libcxx=false,,"
+#  As of Chromium 138, libc++ is required unconditionally.
+# https://docs.google.com/document/d/193ig0qeM23rK1yH6bW14O3zIgVztyKaY4R1XRwgmUFk/edit?usp=sharing
+# Force use_custom_libcxx=true as Chromium 138+ requires libc++
+GN_ARGS += "use_custom_libcxx=true"
 
 PACKAGECONFIG[cups] = "use_cups=true,use_cups=false,cups"
 PACKAGECONFIG[gtk4] = ""
@@ -146,6 +144,10 @@ PACKAGECONFIG[upower] = ",,,upower"
 # but remember to also use proprietary codecs so that H.264 is supported. Also note
 # that not all the hardware configs might be supported.
 PACKAGECONFIG[use-vaapi] = "use_vaapi=true use_libgav1_parser=true,use_vaapi=false,libva"
+# Enable stateless V4L2 M2M video decoding support.
+# This requires 'proprietary-codecs' PACKAGECONFIG
+# to decode h264 streams on the V4L2 M2M device.
+PACKAGECONFIG[use-v4l2] = "use_v4l2_codec=true,use_v4l2_codec=false"
 
 # Base GN arguments, mostly related to features we want to enable or disable.
 GN_ARGS = " \
@@ -203,6 +205,13 @@ DEBUG_FLAGS:remove:x86 = "-g"
 DEBUG_FLAGS:append:x86 = "-g1"
 GN_ARGS += "symbol_level=0"
 
+# For ARM builds, completely remove debug flags that cause binary size issues
+# This prevents the "output file too large" linker error on ARM32
+CFLAGS:remove:arm = "-g"
+CXXFLAGS:remove:arm = "-g"
+TARGET_CFLAGS:remove:arm = "-g"
+TARGET_CXXFLAGS:remove:arm = "-g"
+
 # As of Chromium 62.0.3202.94 and Yocto Rocko (GCC 7, binutils 2.29), passing
 # -g to the compiler results in many linker errors on aarch64, such as:
 # obj/third_party/WebKit/Source/modules/payments/libpayments.a(PaymentEventDataConversion.o)(.debug_loc+0x4e25): error: relocation overflow in R_AARCH64_ABS32
@@ -255,6 +264,10 @@ GN_ARGS += "disable_fieldtrial_testing_config=true"
 # See https://crrev.com/c/2424669
 GN_ARGS += "chrome_pgo_phase=0"
 
+# Disable passing --warning-suppression-mappings= flag to clang.
+# This feature is available on Clang21+
+GN_ARGS += "clang_warning_suppression_file="""
+
 # API keys for accessing Google services. By default, we use an invalid key
 # only to prevent the "you are missing an API key" infobar from being shown on
 # startup.
@@ -274,6 +287,9 @@ GN_ARGS += ' \
 BUILD_CPPFLAGS:append:runtime-llvm = " -isysroot=${STAGING_DIR_NATIVE} -stdlib=libc++"
 # Use libgcc for native parts
 BUILD_LDFLAGS:append:runtime-llvm = " -rtlib=libgcc -unwindlib=libgcc -stdlib=libc++ -lc++abi -rpath ${STAGING_LIBDIR_NATIVE}"
+LDFLAGS:append:runtime-llvm = " --target=${TARGET_SYS}"
+CXXFLAGS:append:runtime-llvm = " --target=${TARGET_SYS} -nostdlib++"
+CFLAGS:append:runtime-llvm = " --target=${TARGET_SYS}"
 
 # Toolchains we will use for the build. We need to point to the toolchain file
 # we've created, set the right target architecture and make sure we are not
@@ -341,15 +357,16 @@ ARM_VERSION:armv6 = "6"
 # overriding what GN wants
 TUNE_CCARGS:remove = "-mthumb"
 
+# Linking rust with partitionalloc is problematic in arm32
 GN_ARGS:append:arm = ' \
         arm_float_abi="${ARM_FLOAT_ABI}" \
         arm_fpu="${ARM_FPU}" \
         arm_tune="${ARM_TUNE}" \
         arm_version=${ARM_VERSION} \
+        use_partition_alloc_as_malloc=false \
+        enable_backup_ref_ptr_support=false \
 '
-# tcmalloc's atomicops-internals-arm-v6plus.h uses the "dmb" instruction that
-# is not available on (some?) ARMv6 models, which causes the build to fail.
-GN_ARGS:append:armv6 = ' use_partition_alloc_as_malloc=false enable_backup_ref_ptr_support=false'
+
 # The WebRTC code fails to build on ARMv6 when NEON is enabled.
 # https://bugs.chromium.org/p/webrtc/issues/detail?id=6574
 GN_ARGS:append:armv6 = ' arm_use_neon=false'
@@ -363,6 +380,7 @@ CHROMIUM_EXTRA_ARGS ?= " \
         ${@bb.utils.contains('PACKAGECONFIG', 'use-egl', '--use-angle=gles-egl', '', d)} \
         ${@bb.utils.contains('PACKAGECONFIG', 'kiosk-mode', '--kiosk --no-first-run --incognito', '', d)} \
         ${@bb.utils.contains('PACKAGECONFIG', 'gtk4', '--gtk-version=4', '', d)} \
+        ${@bb.utils.contains('PACKAGECONFIG', 'use-v4l2', '--ozone-platform-hint=wayland --enable-features=AcceleratedVideoDecoder,AcceleratedVideoDecodeLinuxGL,AcceleratedVideoDecodeLinuxZeroCopyGL', '', d)} \
 "
 
 # V8's JIT infrastructure requires binaries such as mksnapshot and
@@ -420,6 +438,7 @@ python do_write_toolchain_file () {
     toolchain_file = os.path.join(toolchain_dir, "BUILD.gn")
     write_toolchain_file(d, toolchain_file)
 }
+
 addtask write_toolchain_file after do_patch before do_configure
 
 do_add_nodejs_symlink () {
@@ -441,16 +460,34 @@ do_add_clang_latest () {
     # directory that is a copy of /usr/lib/clang/$CLANG_VERSION. Chromium
     # manually links against libclang_rt.builtins.a and uses the `clang_version`
     # GN variable to find it. This allows us to set it to the same value for all
-    # Yocto releases.
+    # Yocto releases. Also copy headers so bindgen can find system headers.
     cd "${STAGING_LIBDIR_NATIVE}/clang"
     rm -rf latest
-    # find the directory containing the library
+    
+    # Find a directory with runtime libraries and copy it as base
     for dir in *; do
-        if [ -n "$(find $dir -name 'libclang_rt.builtins*')" ] ; then
+        if [ -d "$dir" ] && [ -n "$(find $dir -name 'libclang_rt.builtins*' 2>/dev/null)" ]; then
+            echo "Copying clang directory $dir to latest (runtime libraries)"
             cp -r "$dir" latest
             break
         fi
     done
+    
+    # Find and copy headers from any versioned directory to ensure bindgen can find them
+    headers_copied=false
+    for dir in *; do
+        if [ -d "$dir/include" ]; then
+            echo "Found headers in $dir/include, copying to latest/include"
+            mkdir -p latest/include
+            cp -r "$dir/include/"* latest/include/
+            headers_copied=true
+            break
+        fi
+    done
+    
+    if [ "$headers_copied" = false ]; then
+        echo "Warning: No Clang headers found in any versioned directories"
+    fi
 }
 addtask add_clang_latest after do_configure before do_compile
 
@@ -478,6 +515,12 @@ addtask copy_target_rustlibs after do_configure before do_compile
 do_configure() {
 	cd ${S}
 	python3 ./build/linux/unbundle/replace_gn_files.py --system-libraries ${GN_UNBUNDLE_LIBS}
+
+	# Add Rust-style target triples (converted by Yocto's rust-common.bbclass)
+	grep -qxF "${RUST_TARGET_SYS}" ${S}/build/rust/known-target-triples.txt || echo "${RUST_TARGET_SYS}" >> ${S}/build/rust/known-target-triples.txt
+	grep -qxF "${RUST_HOST_SYS}" ${S}/build/rust/known-target-triples.txt || echo "${RUST_HOST_SYS}" >> ${S}/build/rust/known-target-triples.txt
+	grep -qxF "${RUST_BUILD_SYS}" ${S}/build/rust/known-target-triples.txt || echo "${RUST_BUILD_SYS}" >> ${S}/build/rust/known-target-triples.txt
+
 	gn gen --args='${GN_ARGS}' "${OUTPUT_DIR}"
 }