gnu: ungoogled-chromium: Update to 147.0.7727.55.

Fixes various CVEs, too many to list.

* gnu/packages/chromium.scm (%preserved-third-party-files): Add
  base/third_party/nspr,
  buildtools/third_party/libc++,
  buildtools/third_party/libc++abi,
  third_party/catapult/third_party/beautifulsoup4-4.9.3,
  third_party/catapult/third_party/html5lib-1.1,
  third_party/catapult/third_party/typ,
  third_party/dawn/third_party/renderdoc,
  third_party/dawn/third_party/webgpu-headers,
  third_party/devscripts,
  third_party/devtools-frontend/src/front_end/third_party/csp_evaluator,
  third_party/devtools-frontend/src/front_end/third_party/legacy-javascript,
  third_party/devtools-frontend/src/front_end/third_party/source-map-scopes-codec,
  third_party/federated_compute/chromium/fcp/confidentialcompute,
  third_party/freetype,
  third_party/fxdiv,
  third_party/hyphenation-patterns,
  third_party/icu,
  third_party/libc++,
  third_party/libpfm4,
  third_party/libpng,
  third_party/libx11,
  third_party/libxcb-keysyms,
  third_party/llvm-libc,
  third_party/neon_2_sse,
  third_party/opus,
  third_party/pdfium/third_party/lcms,
  third_party/pdfium/third_party/libopenjpeg,
  third_party/perfetto/protos/third_party/pprof,
  third_party/perfetto/protos/third_party/primes,
  third_party/perfetto/protos/third_party/simpleperf,
  third_party/pyyaml,
  third_party/sentencepiece,
  third_party/sentencepiece/src/third_party/darts_clone,
  third_party/six and
  third_party/skia/include/third_party/vulkan.
Remove:
  net/third_party/nss,
  third_party/compiler-rt/src/lib,
  third_party/libaom/source/libaom/third_party/SVT-AV1,
  third_party/skia/third_party/vulkanmemoryallocator and
  third_party/webrtc/rtc_base/third_party/sigslot.

(%chromium-version): Update to 147.0.7727.55.
(%ungoogled-origin, %debian-origin): Update hashes.
(%debian-patches): Add debianization/safe-libcxx.patch,
  disable/enterprise-tests.patch,
  disable/rustc-allow-features.patch,
  fixes/bytemuck.patch,
  fixes/libpng-testonly.patch,
  llvm-19/clang19.patch (move from bookwork),
  llvm-19/clone-traits.patch,
  llvm-19/keyfactory.patch,
  llvm-19/value-or.patch,
  llvm-22/ignore-for-ubsan.patch,
  trixie/cookie-string-view.patch and
  trixie/nodejs-main.patch.
Remove trixie/rust-no-alloc-shim.patch.

(%guix-patches): Add ungoogled-chromium-custom-compiler.patch and
ungoogled-chromium-empty-parsed-rustc-args.patch.  Remove
ungoogled-chromium-unbundle-icu-target.patch which was merged upstream.
(ungoogled-chromium-snippet): Remove icu from replace_gn_files args.  Our
icu does not have ucmndata.h, umapfile.h and putilimp.h which are required
to build now.
(ungoogled-chromium) [arguments] <#:configure-flags>: Add is_component_build,
webnn_use_tflite, fatal_linker_warnings, enable_perfetto_unittests,
skia_enable_skshapper_tests, tint_build_unittests, enable_nocompile_tests,
enable_screen_ai_browsertests flags and set them to false.  Set
use_system_icu to false.  Remove enable_glic, enable_js_type_check and
removed_rust_stdlib_libs.  The first two were removed and the last one is
not necessary any longer.  Add blink_symbol_level and v8_symbol_level and
set them to zero.
[arguments] <#:phases> {patch-stuff}: Remove compiler substitution which
is not needed anymore.  Adjust rustfmt_path to guix.
{include-pthreadpool}: New phase.
{adjust-CPLUS_INCLUDE_PATH}: Help clang find gcc's bits/c++config.h.
[inputs]: icu-77 is required now, even though we're not using it this time.

* gnu/packages/patches/ungoogled-chromium-custom-compiler.patch: Add it.
* gnu/packages/patches/ungoogled-chromium-empty-parsed-rustc-args.patch: Same.
* gnu/packages/patches/ungoogled-chromium-unbundle-icu-target.patch: Remove it.
* gnu/local.mk: (Un)register the above patches.

Change-Id: I597b69b15368e9b410fa3d29342700d9ea0b0d82
Signed-off-by: Andreas Enge <andreas@enge.fr>

5 files changed, 455 insertions, 88 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 17d4af244bf..c5e5f07ec23 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -2522,10 +2522,11 @@ dist_patch_DATA =						\
   %D%/packages/patches/ultrastar-deluxe-no-freesans.patch               \
   %D%/packages/patches/unity-test-set-subdir-correctly.patch            \
   %D%/packages/patches/unity-test-support-int64.patch           \
+  %D%/packages/patches/ungoogled-chromium-custom-compiler.patch         \
+  %D%/packages/patches/ungoogled-chromium-empty-parsed-rustc-args.patch \
   %D%/packages/patches/ungoogled-chromium-extension-search-path.patch   \
   %D%/packages/patches/ungoogled-chromium-RUNPATH.patch         \
   %D%/packages/patches/ungoogled-chromium-system-nspr.patch     \
-  %D%/packages/patches/ungoogled-chromium-unbundle-icu-target.patch     \
   %D%/packages/patches/unknown-horizons-python-3.8-distro.patch \
   %D%/packages/patches/unknown-horizons-python-3.9.patch        \
   %D%/packages/patches/unknown-horizons-python-3.10.patch       \
diff --git a/gnu/packages/chromium.scm b/gnu/packages/chromium.scm
index ee46688d0f3..c6186ff7056 100644
--- a/gnu/packages/chromium.scm
+++ b/gnu/packages/chromium.scm
@@ -79,11 +79,13 @@
   '("base/third_party/cityhash" ;Expat
     "base/third_party/double_conversion" ;BSD-3
     "base/third_party/icu" ;Unicode, X11-style
+    "base/third_party/nspr" ;MPL-2.0
     "base/third_party/superfasthash" ;BSD-3
     "base/third_party/symbolize" ;BSD-3
     "base/third_party/xdg_user_dirs" ;Expat
+    "buildtools/third_party/libc++" ;BSD
+    "buildtools/third_party/libc++abi" ;BSD
     "net/third_party/mozilla_security_manager" ;MPL-1.1/GPL2+/LGPL2.1+
-    "net/third_party/nss" ;MPL-2.0
     "net/third_party/quiche" ;BSD-3
     "net/third_party/uri_template" ;ASL2.0
     "third_party/abseil-cpp" ;ASL2.0
@@ -104,8 +106,11 @@
     "third_party/catapult" ;BSD-3
     "third_party/catapult/common/py_vulcanize/third_party/rcssmin" ;ASL2.0
     "third_party/catapult/common/py_vulcanize/third_party/rjsmin" ;ASL2.0
+    "third_party/catapult/third_party/beautifulsoup4-4.9.3" ;Expat
+    "third_party/catapult/third_party/html5lib-1.1" ;Expat
     "third_party/catapult/third_party/polymer" ;BSD-3
     "third_party/catapult/third_party/six" ;Expat
+    "third_party/catapult/third_party/typ" ;ASL2.0
     ;; XXX: This is a minified version of <https://d3js.org/>.
     "third_party/catapult/tracing/third_party/d3" ;BSD-3
     "third_party/catapult/tracing/third_party/gl-matrix" ;Expat
@@ -120,19 +125,12 @@
     "third_party/cld_3" ;ASL2.0
     "third_party/closure_compiler" ;ASL2.0
     "third_party/compiler-rt" ;ASL2.0
-    "third_party/compiler-rt/src/lib" ;ASL2.0
-    "third_party/compiler-rt/src/lib/builtins" ;ASL2.0
     "third_party/content_analysis_sdk" ;BSD-3
     "third_party/cpuinfo" ;BSD-2
     "third_party/crabbyavif" ;ASL2.0
-    "third_party/crabbyavif/src/sys/dav1d-sys" ;ASL2.0
-    "third_party/crabbyavif/src/sys/aom-sys" ;ASL2.0
-    "third_party/crabbyavif/src/sys/libgav1-sys" ;ASL2.0
-    "third_party/crabbyavif/src/sys/libyuv-sys" ;ASL2.0
-    "third_party/crabbyavif/src/sys/ndk-sys" ;ASL2.0
     "third_party/crashpad" ;ASL2.0
     "third_party/crashpad/crashpad/third_party/lss" ;ASL2.0
-    "third_party/crashpad/crashpad/third_party/zlib/zlib_crashpad.h" ;Zlib
+    "third_party/crashpad/crashpad/third_party/zlib" ;Zlib
     "third_party/crc32c" ;BSD-3
     "third_party/cros_system_api" ;BSD-3
     "third_party/dav1d" ;BSD-2
@@ -140,19 +138,25 @@
     ;; TODO: can likely be unbundled when Vulkan is updated.
     "third_party/dawn/third_party/khronos" ;ASL2.0
     "third_party/dawn/third_party/gn/webgpu-cts" ;BSD-3
+    "third_party/dawn/third_party/renderdoc" ;Expat
+    "third_party/dawn/third_party/webgpu-headers" ;BSD-3
+    "third_party/depot_tools" ;BSD-3
+    "third_party/devscripts" ;GPL2.0
     "third_party/devtools-frontend" ;BSD-3
     "third_party/devtools-frontend/src/front_end"
     "third_party/devtools-frontend/src/front_end/third_party"
     "third_party/devtools-frontend/src/front_end/third_party/acorn" ;Expat
     "third_party/devtools-frontend/src/front_end/third_party\
 /additional_readme_paths.json" ;no explicit license; trivial
-    "third_party/devtools-frontend/src/front_end/third_party/json5" ;Expat
     "third_party/devtools-frontend/src/front_end/third_party/axe-core" ;MPL2.0
     "third_party/devtools-frontend/src/front_end/third_party/chromium" ;BSD-3
     "third_party/devtools-frontend/src/front_end/third_party/codemirror" ;Expat
+    "third_party/devtools-frontend/src/front_end/third_party/csp_evaluator" ;BSD-3
     "third_party/devtools-frontend/src/front_end/third_party/diff" ;ASL2.0
     "third_party/devtools-frontend/src/front_end/third_party/i18n" ;ASL2.0
     "third_party/devtools-frontend/src/front_end/third_party/intl-messageformat" ;BSD-3
+    "third_party/devtools-frontend/src/front_end/third_party/json5" ;Expat
+    "third_party/devtools-frontend/src/front_end/third_party/legacy-javascript" ;ASL-2.0
     "third_party/devtools-frontend/src/front_end/third_party/lighthouse" ;ASL2.0
     "third_party/devtools-frontend/src/front_end/third_party/lit" ;BSD-3
     "third_party/devtools-frontend/src/front_end/third_party/marked" ;Expat, BSD-3
@@ -164,10 +168,12 @@
     "third_party/devtools-frontend/src/front_end/third_party/puppeteer/third_party/parsel" ; Expat
     "third_party/devtools-frontend/src/front_end/third_party/puppeteer/third_party/rxjs" ; ASL2.0
     "third_party/devtools-frontend/src/front_end/third_party/puppeteer-replay" ;ASL2.0
+    "third_party/devtools-frontend/src/front_end/third_party/source-map-scopes-codec" ;BSD-3
     "third_party/devtools-frontend/src/front_end/third_party\
 /vscode.web-custom-data" ;Expat
     "third_party/devtools-frontend/src/front_end/third_party/third-party-web" ;Expat
     "third_party/devtools-frontend/src/front_end/third_party/wasmparser" ;ASL2.0
+    "third_party/devtools-frontend/src/front_end/third_party/web-vitals" ;Expat
     "third_party/devtools-frontend/src/third_party/i18n" ;ASL2.0
     "third_party/devtools-frontend/src/third_party/pyjson5" ;ASL2.0
 
@@ -179,6 +185,7 @@
     "third_party/farmhash" ;Expat
     "third_party/fast_float" ;ASL2.0, Boost1.0, Expat
     "third_party/fdlibm" ;non-copyleft
+    "third_party/federated_compute/chromium/fcp/confidentialcompute" ;ASL2.0
     "third_party/federated_compute/src/fcp/base" ;ASL2.0
     "third_party/federated_compute/src/fcp/confidentialcompute" ;ASL2.0
     "third_party/federated_compute/src/fcp/protos/confidentialcompute" ;ASL2.0
@@ -187,7 +194,9 @@
     "third_party/fft2d" ;non-copyleft
     "third_party/flatbuffers" ;ASL2.0
     "third_party/fp16" ;Expat
+    "third_party/freetype" ;GPL2.0
     "third_party/fusejs" ;ASL2.0
+    "third_party/fxdiv" ;Expat
     "third_party/gemmlowp" ;ASL2.0
     "third_party/google_input_tools" ;ASL2.0
     "third_party/google_input_tools/third_party/closure_library" ;ASL2.0
@@ -196,6 +205,9 @@
     "third_party/harfbuzz-ng" ;Expat
     "third_party/highway" ;ASL2.0
     "third_party/hunspell" ;MPL1.1/GPL2+/LGPL2.1+
+    "third_party/hyphenation-patterns" ;Expat
+    ;; FIXME: Our icu does not have some headers such as udatamem.h.
+    "third_party/icu" ;Unicode3.0
     "third_party/ink" ;ASL2.0
     "third_party/ink_stroke_modeler" ;ASL2.0
     "third_party/inspector_protocol" ;BSD-3
@@ -208,12 +220,14 @@
     "third_party/libaddressinput" ;ASL2.0
     "third_party/libaom" ;BSD-2 or "Alliance for Open Media Patent License 1.0"
     "third_party/libaom/source/libaom/third_party/fastfeat" ;BSD-3
-    "third_party/libaom/source/libaom/third_party/SVT-AV1" ;BSD-3
     "third_party/libaom/source/libaom/third_party/vector" ;Expat
     "third_party/libaom/source/libaom/third_party/x86inc" ;ISC
+    "third_party/libc++" ;Expat
     "third_party/libdrm" ; Expat
     "third_party/libgav1" ;ASL2.0
     "third_party/libjingle_xmpp" ;BSD-3
+    "third_party/libpfm4" ;BSD
+    "third_party/libpng" ;PNG2.0
     "third_party/libphonenumber" ;ASL2.0
     "third_party/libsecret" ;LGPL2.1+
     "third_party/libsrtp" ;BSD-3
@@ -227,11 +241,15 @@
     "third_party/libvpx/source/libvpx/third_party/x86inc" ;Expat
 
     "third_party/libwebm" ;BSD-3
+    "third_party/libx11" ;BSD
+    "third_party/libxcb-keysyms" ;BSD
     "third_party/libxml/chromium" ;BSD-3
     "third_party/libyuv" ;BSD-3
     "third_party/libzip" ;BSD-3
     "third_party/lit" ;BSD-3
     "third_party/lit/v3_0" ;BSD-3
+    "third_party/llvm-libc" ;ASL2.0
+    "third_party/llvm-libc/src/shared" ;ASL2.0
     "third_party/lottie" ;Expat
     "third_party/lss" ;BSD-3
     "third_party/lzma_sdk" ;public domain
@@ -244,6 +262,7 @@
     "third_party/modp_b64" ;BSD-3
     "third_party/nasm" ;BSD-2
     "third_party/nearby" ;ASL2.0
+    "third_party/neon_2_sse" ;BSD-2
     "third_party/node" ;Expat
     "third_party/oak/chromium/proto" ;ASL2.0
     "third_party/oak/chromium/proto/attestation" ;ASL2.0
@@ -251,14 +270,20 @@
     "third_party/one_euro_filter" ;BSD-3
     "third_party/openscreen" ;BSD-3
     "third_party/openscreen/src/third_party/tinycbor" ;Expat
+    "third_party/opus" ;BSD-3
     "third_party/ots" ;BSD-3
     "third_party/pdfium" ;BSD-3
     "third_party/pdfium/third_party/agg23" ;Expat
     "third_party/pdfium/third_party/bigint" ;Public domain, BSD-3
+    "third_party/pdfium/third_party/lcms" ;Expat
+    "third_party/pdfium/third_party/libopenjpeg" ;BDS-2
     "third_party/pdfium/third_party/libtiff" ;non-copyleft
     "third_party/pdfium/third_party/freetype/include/pstables.h" ;FreeType
     "third_party/perfetto" ;ASL2.0
     "third_party/perfetto/protos/third_party/chromium" ;BSD-3
+    "third_party/perfetto/protos/third_party/pprof" ;ASL2.0
+    "third_party/perfetto/protos/third_party/primes" ;ASL2.0
+    "third_party/perfetto/protos/third_party/simpleperf" ;ASL2.0
     "third_party/pffft" ;the "FFTPACK" license
     "third_party/ply" ;BSD-3
     "third_party/polymer" ;BSD-3
@@ -268,6 +293,7 @@
     "third_party/protobuf/third_party/utf8_range" ; Expat
     "third_party/pthreadpool" ;BSD-2
     "third_party/puffin" ;Non-copyleft
+    "third_party/pyyaml" ;Expat
     "third_party/pyjson5" ;ASL2.0
     "third_party/rapidhash" ;BSD-2
     "third_party/readability" ;ASL2.0
@@ -279,11 +305,14 @@
     "third_party/search_engines_data" ;BSD-3
     "third_party/securemessage" ;ASL2.0
     "third_party/selenium-atoms" ;ASL2.0
+    "third_party/sentencepiece" ;ASL2.0
+    "third_party/sentencepiece/src/third_party/darts_clone" ;BSD-3
     "third_party/shell-encryption" ;ASL2.0
     "third_party/simdutf" ;Non-copyleft
     "third_party/simplejson" ; Non-copyleft
+    "third_party/six" ;Expat
     "third_party/skia" ;BSD-3
-    "third_party/skia/third_party/vulkanmemoryallocator" ;BSD-3, Expat
+    "third_party/skia/include/third_party/vulkan" ;BSD-3
     "third_party/smhasher" ;Expat, public domain
 
     ;; FIXME: the snappy "replacement" shim (see replace_gn_files.py below) does
@@ -338,7 +367,6 @@
     "third_party/webrtc/modules/third_party/fft" ;Non-copyleft
     "third_party/webrtc/modules/third_party/g711" ;Public domain
     "third_party/webrtc/modules/third_party/g722" ;Public domain
-    "third_party/webrtc/rtc_base/third_party/sigslot" ;Public domain
     "third_party/widevine/cdm/widevine_cdm_common.h" ;BSD-3
     "third_party/woff2" ;ASL2.0
     "third_party/wuffs" ;ASL2.0
@@ -372,7 +400,7 @@
   ;; run the Blink performance tests, just remove everything to save ~70MiB.
   '("third_party/blink/perf_tests"))
 
-(define %chromium-version "141.0.7390.65")
+(define %chromium-version "147.0.7727.55")
 (define %ungoogled-revision (string-append %chromium-version "-1"))
 (define %debian-revision (string-append "debian/" %ungoogled-revision))
 
@@ -384,7 +412,7 @@
     (file-name (git-file-name "ungoogled-chromium" %ungoogled-revision))
     (sha256
      (base32
-      "1hk4rww2gccly1qv0xnswd77haj02rlza82403dxdjm8fkdfndy6"))))
+      "0l6v4wf16067igawjlh90f3d287mkw0cq4j5lvrxxy17y1skynzc"))))
 
 (define %debian-origin
   (origin
@@ -397,7 +425,7 @@
                                 ((_ version) version))))
     (sha256
      (base32
-      "06s3kvwb3490xb28n6r3q5n1c0ylsvchiw6s4h1rrp8jqzwjbmc6"))))
+      "0gqarll08i7rcs1amapciv263xvzglc8p44ikavq3xd12yyvcd98"))))
 
 (define (origin-file origin file)
   (computed-file
@@ -410,26 +438,38 @@
 
 (define %debian-patches
   (map debian-patch
-       '("bookworm/clang19.patch"
-         "bookworm/foreach.patch"
+       '("bookworm/foreach.patch"
+         "debianization/safe-libcxx.patch"
+         "disable/enterprise-tests.patch"
          "disable/node-version-ck.patch"
+         "disable/rustc-allow-features.patch"
+         "fixes/bytemuck.patch"
          "fixes/gentoo-stylesheet.patch"
          "fixes/libcpp-headers.patch"
+         "fixes/libpng-testonly.patch"
          "fixes/rust-clanglib.patch"
+         "llvm-19/clang19.patch"
+         "llvm-19/clone-traits.patch"
+         "llvm-19/keyfactory.patch"
+         "llvm-19/value-or.patch"
+         "llvm-22/ignore-for-ubsan.patch"
          "system/openjpeg.patch"
-         ;; Remove after rust is past
-         ;; <https://github.com/rust-lang/rust/pull/141061>.
-         "trixie/rust-no-alloc-shim.patch")))
+         "trixie/cookie-string-view.patch"
+         "trixie/nodejs-main.patch")))
 
 (define %guix-patches
   (list (local-file
          (assume-valid-file-name
           (search-patch
-           "ungoogled-chromium-extension-search-path.patch")))
+           "ungoogled-chromium-custom-compiler.patch")))
+        (local-file
+         (assume-valid-file-name
+          (search-patch
+           "ungoogled-chromium-empty-parsed-rustc-args.patch")))
         (local-file
          (assume-valid-file-name
           (search-patch
-           "ungoogled-chromium-unbundle-icu-target.patch")))
+           "ungoogled-chromium-extension-search-path.patch")))
         (local-file
          (assume-valid-file-name
           (search-patch
@@ -500,9 +540,8 @@
              "#if 0"))
           (invoke "python" "build/linux/unbundle/replace_gn_files.py"
                   "--system-libraries" "flac" "fontconfig" "freetype"
-                  "harfbuzz-ng" "icu" "libjpeg"
-                  "libpng" "libwebp" "libxml" "libxslt" "openh264" "opus"
-                  "zlib")))))
+                  "harfbuzz-ng" "libjpeg" "libpng" "libwebp" "libxml"
+                  "libxslt" "openh264" "opus" "zlib")))))
 
 (define opus+custom
   (package/inherit opus
@@ -531,7 +570,7 @@
                                   %chromium-version "-lite.tar.xz"))
               (sha256
                (base32
-                "09iwglswnr6d45zz3zsjw7jpm1xlwwkxlz9h5nlhqxyd933a04fq"))
+                "1salvlw5sykx3zmsbp7cgmf7y8yy6jlgb4b4zswzsbjrprk4jnap"))
               (modules '((guix build utils)))
               (snippet (force ungoogled-chromium-snippet))))
     (build-system gnu-build-system)
@@ -548,6 +587,7 @@
       ;; directory for an exhaustive list of supported flags.
       ;; (Note: The 'configure' phase will do that for you.)
       #~(list "is_debug=false"
+              "is_component_build=false"
               ;; Use the "official" release optimizations, as opposed to
               ;; a developer build.
               "is_official_build=true"
@@ -555,6 +595,7 @@
               "use_clang_modules=false"
               "use_custom_libcxx=false" ; support for this is deprecated and to be removed.
               "optimize_webui=false"
+              "webnn_use_tflite=false"
               "safe_browsing_use_unrar=false"
               "chrome_pgo_phase=0"
               "use_sysroot=false"
@@ -572,12 +613,10 @@
               "enable_service_discovery=false"
               "enable_vr=false"
               "enable_enterprise_companion=false"
-              "enable_glic=false"
               "enable_iterator_debugging=false"
               "enable_hangout_services_extension=false"
               "enable_widevine=false"
-              ;; Disable type-checking for the Web UI to avoid a Java dependency.
-              "enable_js_type_check=false"
+              "fatal_linker_warnings=false"
               ;; Disable code using TensorFlow until it has been scrutinized
               ;; by the ungoogled project.
               "build_with_tflite_lib=false"
@@ -589,6 +628,11 @@
               "angle_has_histograms=false"
               "angle_build_tests=false"
               "build_angle_perftests=false"
+              "enable_perfetto_unittests=false"
+              "skia_enable_skshapper_tests=false"
+              "tint_build_unittests=false"
+              "enable_nocompile_tests=false"
+              "enable_screen_ai_browsertests=false"
 
               "clang_warning_suppression_file=\"\""
 
@@ -597,6 +641,8 @@
               "is_cfi=false"
 
               "symbol_level=0"
+              "blink_symbol_level=0"
+              "v8_symbol_level=0"
               "v8_enable_backtrace=false"
 
               ;; Define a custom toolchain that simply looks up CC, AR and
@@ -628,26 +674,10 @@
                              ;; invokation and fails if it's just the version number.
                              " (f6e511eec 2024-10-15) (built from a source tarball)\"")
 
-              ;; Chromium's build/rust/std/BUILD.gn has a hardcoded
-              ;; list of stdlib rlibs (stdlib_files) that GN uses to
-              ;; declare build outputs.  GN requires static output
-              ;; declarations, so the list must exactly match what
-              ;; rlibs exist in the Rust sysroot.  Chromium's list
-              ;; includes unicode_width because their bundled
-              ;; toolchain (Rust 1.89) ships it as a dependency of
-              ;; getopts 0.2.23.  Our Rust 1.93 has getopts 0.2.24
-              ;; which dropped that dependency, so unicode_width is
-              ;; not in our sysroot.  This GN arg removes it from
-              ;; the list.  (Chromium's own use of unicode_width via
-              ;; codespan-reporting is a separate vendored copy under
-              ;; third_party/rust/chromium_crates_io/ and is
-              ;; unaffected.)
-              "removed_rust_stdlib_libs=[\"unicode_width\"]"
-
               ;; Prefer system libraries.
               "use_system_freetype=true"
               "use_system_harfbuzz=true"
-              "use_system_icu=true"
+              "use_system_icu=false"
               "use_system_lcms2=true"
               "use_system_libffi=true"
               "use_system_libjpeg=true"
@@ -713,9 +743,9 @@
 
                 ;; Many files try to include ICU headers from "third_party/icu/...".
                 ;; Remove the "third_party/" prefix to use system headers instead.
-                (substitute* (find-files "chrome" "\\.cc$")
-                  (("third_party/icu/source/(common|i18n)/")
-                   ""))
+                ;(substitute* (find-files "chrome" "\\.cc$")
+                ;  (("third_party/icu/source/(common|i18n)/")
+                ;   ""))
 
                 ;; XXX: Should be unnecessary when use_system_lcms2=true.
                 (substitute* "third_party/pdfium/core/fxcodec/icc/icc_transform.h"
@@ -732,16 +762,19 @@
                   (("include \"third_party/curl")
                    "include \"curl"))
 
-                ;; Unknown flags as of clang-19, can be removed when building with
-                ;; newer clang.
-                (substitute* "build/config/compiler/BUILD.gn"
-                  (("-gsimple-template-names") ""))
-
-                ;; Clang libs are not under bindgen root directory.
-                (substitute* "build/rust/rust_bindgen_generator.gni"
+                ;; Our clang libs and rustfmt are not under bindgen root directory.
+                (substitute* '("build/rust/rust_bindgen_generator.gni"
+                               "build/rust/rust_bindgen.gni")
                   (("(_libclang_path = )rust_bindgen_root" _ libclang)
-                   (string-append libclang "clang_base_path"))))))
-          (add-after 'patch-stuff 'add-absolute-references
+                   (string-append libclang "clang_base_path"))
+                  (("(_rustfmt_path = \")\\$\\{rust_bindgen_root\\}" _ rustfmt)
+                   (string-append rustfmt "${rust_sysroot_absolute}"))))))
+          (add-after 'patch-stuff 'include-pthreadpool
+            ;; FIXME: Somehow the build system cannot locate this header.
+            (lambda _
+              (copy-file "third_party/pthreadpool/src/include/pthreadpool.h"
+                         "pthreadpool.h")))
+          (add-after 'include-pthreadpool 'add-absolute-references
             (lambda* (#:key inputs #:allow-other-keys)
               (let ((cups-config (search-input-file inputs "/bin/cups-config"))
                     (libnssckbi.so (search-input-file inputs
@@ -763,13 +796,22 @@
           (add-after 'add-absolute-references 'adjust-CPLUS_INCLUDE_PATH
             ;; The libcxx include/c++/v1 directory is not exposed via
             ;; CPLUS_INCLUDE_PATH by default, causing errors like
-            ;; "fatal error: 'format' file not found".
+            ;; "fatal error: 'format' file not found".  Also clang is
+            ;; unable to find gcc's bits/c++config.h which is machine
+            ;; dependent.
             (lambda* (#:key native-inputs inputs #:allow-other-keys)
-              (setenv "CPLUS_INCLUDE_PATH"
-                      (string-append
-                       (search-input-directory inputs
-                                               "/include/c++/v1")
-                       ":" (getenv "CPLUS_INCLUDE_PATH")))))
+              (let* ((libcxx-v1 (search-input-directory inputs
+                                                        "include/c++/v1"))
+                     (target-system  #$(nix-system->gnu-triplet
+                                         (or (%current-target-system)
+                                             (%current-system))))
+                     (target-include (string-append "include/c++/"
+                                                    target-system))
+                     (gcc-bits  (search-input-directory inputs
+                                                        target-include)))
+                (setenv "CPLUS_INCLUDE_PATH"
+                        (string-append libcxx-v1 ":" gcc-bits ":"
+                         (getenv "CPLUS_INCLUDE_PATH"))))))
           (add-before 'configure 'prepare-build-environment
             (lambda* (#:key native-inputs inputs #:allow-other-keys)
               (let ((node (search-input-file (or native-inputs inputs)
@@ -955,7 +997,7 @@
            glib
            gtk+
            harfbuzz
-           icu4c
+           icu4c-77
            lcms
            libcxx
            libffi
diff --git a/gnu/packages/patches/ungoogled-chromium-custom-compiler.patch b/gnu/packages/patches/ungoogled-chromium-custom-compiler.patch
new file mode 100644
index 00000000000..c14d3349e43
--- /dev/null
+++ b/gnu/packages/patches/ungoogled-chromium-custom-compiler.patch
@@ -0,0 +1,299 @@
+From 7a372a6914e9d9d6f0c914a1ca8cdff592c40593 Mon Sep 17 00:00:00 2001
+From: Matt Jolly <kangie@gentoo.org>
+Date: Thu, 12 Mar 2026 11:57:11 +1000
+Subject: [PATCH] Update compiler patch for M147 beta
+
+Signed-off-by: Matt Jolly <kangie@gentoo.org>
+--- a/build/config/compiler/BUILD.gn
++++ b/build/config/compiler/BUILD.gn
+@@ -367,9 +367,6 @@ config("compiler") {
+ 
+   configs += [
+     # See the definitions below.
+-    ":clang_revision",
+-    ":rustc_revision",
+-    ":compiler_cpu_abi",
+     ":compiler_codegen",
+     ":compiler_deterministic",
+     ":clang_warning_suppression",
+@@ -1690,43 +1687,6 @@ config("compiler_deterministic") {
+     }
+   }
+ 
+-  # Makes builds independent of absolute file path.
+-  if (is_clang && strip_absolute_paths_from_debug_symbols) {
+-    # If debug option is given, clang includes $cwd in debug info by default.
+-    # For such build, this flag generates reproducible obj files even we use
+-    # different build directory like "out/feature_a" and "out/feature_b" if
+-    # we build same files with same compile flag.
+-    # Other paths are already given in relative, no need to normalize them.
+-
+-    # -ffile-compilation-dir is an alias for both -fdebug-compilation-dir=
+-    # and -fcoverage-compilation-dir=.
+-    cflags += [ "-ffile-compilation-dir=." ]
+-
+-    # Convert absolute paths to relative paths. Expands to, for example:
+-    #   -file-prefix-map /path/to/chromium/src=../..
+-    swiftflags += [
+-      "-file-prefix-map",
+-      rebase_path("//.", "") + "=" + rebase_path("//.", root_build_dir),
+-    ]
+-    if (!is_win) {
+-      # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167)
+-      asmflags = [ "-Wa,-fdebug-compilation-dir,." ]
+-    }
+-
+-    if (is_win && use_lld) {
+-      if (symbol_level == 2 || (is_clang && using_sanitizer)) {
+-        # Absolutize source file paths for PDB. Pass the real build directory
+-        # if the pdb contains source-level debug information and if linker
+-        # reproducibility is not critical.
+-        ldflags += [ "/PDBSourcePath:" + rebase_path(root_build_dir) ]
+-      } else {
+-        # Use a fake fixed base directory for paths in the pdb to make the pdb
+-        # output fully deterministic and independent of the build directory.
+-        ldflags += [ "/PDBSourcePath:o:\fake\prefix" ]
+-      }
+-    }
+-  }
+-
+   # Tells the compiler not to use absolute paths when passing the default
+   # paths to the tools it invokes. We don't want this because we don't
+   # really need it and it can mess up the RBE cache entries.
+@@ -1759,88 +1719,6 @@ config("compiler_deterministic") {
+   }
+ }
+ 
+-config("clang_revision") {
+-  if (is_clang && clang_base_path == default_clang_base_path &&
+-      current_os != "zos") {
+-    _perform_consistency_checks = current_toolchain == default_toolchain
+-    if (llvm_force_head_revision) {
+-      _head_revision_stamp_path = "//third_party/llvm-build/force_head_revision"
+-      _head_revision = ""
+-      if (path_exists(_head_revision_stamp_path)) {
+-        _head_revision = read_file(_head_revision_stamp_path, "trim string")
+-      }
+-      assert(
+-          _head_revision != "",
+-          "llvm_force_head_revision=true, but no locally built version was detected.")
+-      _clang_revision = _head_revision
+-    } else {
+-      _clang_revision = read_file(
+-              "//third_party/llvm-build/Release+Asserts/cr_build_revision",
+-              "trim string")
+-
+-      # Ensure that the synced clang version matches what's in git.
+-      if (_perform_consistency_checks) {
+-        # Parse the clang version from the Python script.
+-        _clang_version_lines = filter_include(
+-                read_file("//tools/clang/scripts/update.py", "list lines"),
+-                [ "CLANG_*REVISION = *" ])
+-        _py_revision =
+-            string_replace(_clang_version_lines[0], "CLANG_REVISION = '", "")
+-        _py_revision = string_replace(_py_revision, "'", "")
+-        _py_subrevision =
+-            string_replace(_clang_version_lines[1], "CLANG_SUB_REVISION = ", "")
+-        _expected_clang_revision = "$_py_revision-$_py_subrevision"
+-
+-        # TODO(agrieve): Change filter_include to _clang_revision ==
+-        # _expected_clang_revision once angle & webrtc use a GCS DEPS entry
+-        # rather than a update.py runhook.
+-        assert(
+-            filter_include([ _clang_revision ],
+-                           [
+-                             _expected_clang_revision,
+-                             "$_expected_clang_revision,*",
+-                           ]) != [],
+-            "clang_revision=\"$_clang_revision\" but update.py expected \"$_expected_clang_revision\". Did you forget to gclient sync?")
+-      }
+-    }
+-
+-    if (_perform_consistency_checks) {
+-      # Ensure that the revision matches the version major expected by GN.
+-      _versions_match = filter_include([ _clang_revision ],
+-                                       [ "llvmorg-$clang_version-*" ]) != []
+-      assert(
+-          _versions_match,
+-          "clang_revision=\"$_clang_revision\" but clang_version=\"$clang_version\". clang_version in build/toolchain/toolchain.gni is likely outdated.")
+-    }
+-
+-    if (toolchain_has_rust && _perform_consistency_checks &&
+-        !rust_force_head_revision) {
+-      # Ensure that the synced rust version matches what's in git.
+-      _rust_revision_lines =
+-          filter_include(read_file("//tools/rust/update_rust.py", "list lines"),
+-                         [ "RUST_*REVISION = *" ])
+-      _py_revision =
+-          string_replace(_rust_revision_lines[0], "RUST_REVISION = '", "")
+-      _py_revision = string_replace(_py_revision, "'", "")
+-      _py_subrevision =
+-          string_replace(_rust_revision_lines[1], "RUST_SUB_REVISION = ", "")
+-      _expected_rust_revision = "$_py_revision-$_py_subrevision"
+-
+-      # Ensure the rust version matches the clang version.
+-      assert(
+-          filter_include([ rustc_revision ],
+-                         [ "*-$_expected_rust_revision-*" ]) != [],
+-          "rustc_revision=\"$rustc_revision\" but update_rust.py expected \"$_expected_rust_revision\". Run \"gclient sync\"?")
+-    }
+-
+-    # This is here so that all files get recompiled after a clang roll and
+-    # when turning clang on or off. (defines are passed via the command line,
+-    # and build system rebuild things when their commandline changes). Nothing
+-    # should ever read this define.
+-    defines = [ "CR_CLANG_REVISION=\"$_clang_revision\"" ]
+-  }
+-}
+-
+ # Controls the usage of a warning suppression mapping (WSM) file to suppress
+ # warnings based on the path of the file they come from. It's controlled by the
+ # `clang_warning_suppression_file` gn argument , which points to a text file
+@@ -1896,18 +1774,6 @@ config("sanitize_c_array_bounds") {
+   }
+ }
+ 
+-config("rustc_revision") {
+-  if (rustc_revision != "") {
+-    # Similar to the `clang_revision` config, this is here so that all `.rs`
+-    # sources get recompiled after a rustc roll. Nothing should ever read this
+-    # cfg. This will not be set if a custom toolchain is used.
+-    rustflags = [
+-      "--cfg",
+-      "cr_rustc_revision=\"$rustc_revision\"",
+-    ]
+-  }
+-}
+-
+ config("compiler_arm_fpu") {
+   if (current_cpu == "arm" && !is_ios) {
+     cflags = [ "-mfpu=neon" ]
+@@ -2386,11 +2252,7 @@ config("chromium_code") {
+       defines = [ "_HAS_NODISCARD" ]
+     }
+   } else {
+-    cflags = [ "-Wall" ]
+-    if (is_clang) {
+-      # Enable extra warnings for chromium_code when we control the compiler.
+-      cflags += [ "-Wextra" ]
+-    }
++    cflags = []
+ 
+     # In Chromium code, we define __STDC_foo_MACROS in order to get the
+     # C99 macros on Mac and Linux.
+@@ -2399,32 +2261,6 @@ config("chromium_code") {
+       "__STDC_FORMAT_MACROS",
+     ]
+ 
+-    if (!is_debug && !using_sanitizer && current_cpu != "s390x" &&
+-        current_cpu != "ppc64" && current_cpu != "mips" &&
+-        current_cpu != "mips64" && current_cpu != "riscv64" &&
+-        current_cpu != "loong64") {
+-      # Non-chromium code is not guaranteed to compile cleanly with
+-      # _FORTIFY_SOURCE. Also, fortified build may fail when optimizations are
+-      # disabled, so only do that for Release build.
+-      fortify_level = "2"
+-
+-      # ChromeOS's toolchain supports a high-quality _FORTIFY_SOURCE=3
+-      # implementation with a few custom glibc patches. Use that if it's
+-      # available.
+-      if (is_chromeos_device) {
+-        fortify_level = "3"
+-      }
+-
+-      # _FORTIFY_SOURCE=3 is available in glibc 2.34+. Enable it when building
+-      # with the sysroot where support is guaranteed. Clang is also required since
+-      # the system gcc is often patched to add _FORTIFY_SOURCE=2 which would conflict
+-      # with our definition.
+-      if (use_sysroot && is_clang) {
+-        fortify_level = "3"
+-      }
+-      defines += [ "_FORTIFY_SOURCE=" + fortify_level ]
+-    }
+-
+     if (is_apple) {
+       cflags_objc = [ "-Wimplicit-retain-self" ]
+       cflags_objcc = [ "-Wimplicit-retain-self" ]
+@@ -2848,7 +2684,8 @@ config("default_stack_frames") {
+ # [0]: https://pinpoint-dot-chromeperf.appspot.com/job/147634a8be0000
+ # [1]: https://pinpoint-dot-chromeperf.appspot.com/job/132bc772be0000
+ # [2]: https://crrev.com/c/5447532
+-config("optimize") {
++config("optimize") { }
++config("xoptimize") {
+   if (is_win) {
+     # clang-cl's /O2 corresponds to clang's -O3, and really want -O2 for
+     # consistency with the other platforms.
+@@ -2897,7 +2734,8 @@ config("optimize") {
+ }
+ 
+ # Turn off optimizations.
+-config("no_optimize") {
++config("no_optimize") { }
++config("xno_optimize") {
+   if (is_win) {
+     cflags = [
+       "/Od",  # Disable optimization.
+@@ -2932,7 +2770,8 @@ config("no_optimize") {
+ # Turns up the optimization level. Used to explicitly enable -O2 instead of
+ # -Os for select targets on platforms that use optimize_for_size. No-op
+ # elsewhere.
+-config("optimize_max") {
++config("optimize_max") { }
++config("xoptimize_max") {
+   ldflags = common_optimize_on_ldflags
+   if (is_win) {
+     # Favor speed over size, /O2 must be before the common flags.
+@@ -2953,7 +2792,8 @@ config("optimize_max") {
+ #
+ # TODO(crbug.com/41259697) - rework how all of these configs are related
+ # so that we don't need this disclaimer.
+-config("optimize_speed") {
++config("optimize_speed") { }
++config("xoptimize_speed") {
+   ldflags = common_optimize_on_ldflags
+   if (is_win) {
+     # Favor speed over size, /O2 must be before the common flags.
+@@ -2970,7 +2810,8 @@ config("optimize_speed") {
+   rustflags = [ "-Copt-level=3" ]
+ }
+ 
+-config("optimize_fuzzing") {
++config("optimize_fuzzing") { }
++config("xoptimize_fuzzing") {
+   cflags = [ "-O1" ] + common_optimize_on_cflags
+   rustflags = [ "-Copt-level=1" ]
+   ldflags = common_optimize_on_ldflags
+@@ -3115,7 +2956,8 @@ config("split_dwarf") {
+ }
+ 
+ # Full symbols.
+-config("symbols") {
++config("symbols") { }
++config("xsymbols") {
+   rustflags = []
+   configs = []
+   if (is_win) {
+@@ -3275,7 +3117,8 @@ config("symbols") {
+ # Minimal symbols.
+ # This config guarantees to hold symbol for stack trace which are shown to user
+ # when crash happens in unittests running on buildbot.
+-config("minimal_symbols") {
++config("minimal_symbols") { }
++config("xminimal_symbols") {
+   configs = []
+   rustflags = []
+   if (is_win) {
+@@ -3355,7 +3198,8 @@ config("minimal_symbols") {
+ # This configuration contains function names only. That is, the compiler is
+ # told to not generate debug information and the linker then just puts function
+ # names in the final debug information.
+-config("no_symbols") {
++config("no_symbols") { }
++config("xno_symbols") {
+   if (is_win) {
+     ldflags = [ "/DEBUG" ]
+ 
+-- 
+2.52.0
+
diff --git a/gnu/packages/patches/ungoogled-chromium-empty-parsed-rustc-args.patch b/gnu/packages/patches/ungoogled-chromium-empty-parsed-rustc-args.patch
new file mode 100644
index 00000000000..d88cc292c67
--- /dev/null
+++ b/gnu/packages/patches/ungoogled-chromium-empty-parsed-rustc-args.patch
@@ -0,0 +1,46 @@
+From da37bd781c0371e02ffc4877c3ac1b5f2020c207 Mon Sep 17 00:00:00 2001
+From: Matt Jolly <kangie@gentoo.org>
+Date: Tue, 17 Feb 2026 15:45:01 +1000
+Subject: [PATCH] Handle case where `parsed_rustc_args.cfg` is empty
+
+This may occur when (for example) using the unbundle toolchain
+
+Signed-off-by: Matt Jolly <kangie@gentoo.org>
+--- a/third_party/rust/cxx/chromium_integration/run_cxxbridge.py
++++ b/third_party/rust/cxx/chromium_integration/run_cxxbridge.py
+@@ -44,18 +44,20 @@ def calculate_cxxbridge_args(unrecognized_script_args, rustc_print_cfg_path):
+   parser.add_argument("--cfg", action="append"),
+   parsed_rustc_args, _other_args = parser.parse_known_args(
+       args=unrecognized_script_args[:rustflags_separator])
+-  for cfg_arg in parsed_rustc_args.cfg:
+-    if "=" not in cfg_arg:  # `buildflag_header.gni` only supports bool flags.
+-      # TODO(https://crbug.com/436606652): Stop using `_BUILDFLAG_NOT_SET_`
+-      # prefix and instead use `--check-cfg` in `run_cxxbridge.py` to
+-      # detect buildflag names.
+-      FALSE_PREFIX = "_BUILDFLAG_NOT_SET_"
+-      if cfg_arg.startswith(FALSE_PREFIX):
+-        flagname = cfg_arg[len(FALSE_PREFIX):]
+-        cxxbridge_args.append(f"--cfg={flagname}=false")
+-      else:
+-        flagname = cfg_arg
+-        cxxbridge_args.append(f"--cfg={flagname}=true")
++  # Unbundled toolchain may not have any `--cfg` flags
++  if parsed_rustc_args.cfg:
++    for cfg_arg in parsed_rustc_args.cfg:
++      if "=" not in cfg_arg:  # `buildflag_header.gni` only supports bool flags.
++        # TODO(https://crbug.com/436606652): Stop using `_BUILDFLAG_NOT_SET_`
++        # prefix and instead use `--check-cfg` in `run_cxxbridge.py` to
++        # detect buildflag names.
++        FALSE_PREFIX = "_BUILDFLAG_NOT_SET_"
++        if cfg_arg.startswith(FALSE_PREFIX):
++          flagname = cfg_arg[len(FALSE_PREFIX):]
++          cxxbridge_args.append(f"--cfg={flagname}=false")
++        else:
++          flagname = cfg_arg
++          cxxbridge_args.append(f"--cfg={flagname}=true")
+ 
+   with open(rustc_print_cfg_path, 'r') as file:
+     for line in file:
+-- 
+2.52.0
+
diff --git a/gnu/packages/patches/ungoogled-chromium-unbundle-icu-target.patch b/gnu/packages/patches/ungoogled-chromium-unbundle-icu-target.patch
deleted file mode 100644
index 618750f13f1..00000000000
--- a/gnu/packages/patches/ungoogled-chromium-unbundle-icu-target.patch
+++ /dev/null
@@ -1,21 +0,0 @@
-From a665875b4013eed997bd042326a038e24f3296e7 Mon Sep 17 00:00:00 2001
-From: Matt Jolly <kangie@gentoo.org>
-Date: Thu, 10 Oct 2024 14:36:51 +1000
-Subject: [PATCH] unbundle: add missing icu target
-
---- a/build/linux/unbundle/icu.gn
-+++ b/build/linux/unbundle/icu.gn
-@@ -65,6 +65,10 @@ group("icuuc_public") {
-   public_deps = [ ":icuuc" ]
- }
- 
-+group("icui18n_hidden_visibility") {
-+  public_deps = [ ":icuuc" ]
-+}
-+
- shim_headers("icui18n_shim") {
-   root_path = "source/i18n"
-   headers = [
--- 
-2.46.2
-