diff --git a/.gitignore b/.gitignore
index 5dbc255..1e8e515 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,5 @@
 /gn-4aa9bdfa.tar.gz
 /gn-b7903130.tar.gz
 /gn-e0afadf7.tar.gz
+/gn-5e19d2fb.tar.gz
+/gn-5e19d2fb166f.tar.gz
diff --git a/gn.spec b/gn.spec
index 847fcdc..ac643a5 100644
--- a/gn.spec
+++ b/gn.spec
@@ -1,5 +1,5 @@
 # Build HTML docs from markdown using pandoc?
-%bcond_without html_docs
+%bcond html_docs 1
 
 Name:           gn
 # Upstream uses the number of commits in the git history as the version number.
@@ -24,35 +24,41 @@ Name:           gn
 #  7. Commit the changes
 #
 # See https://gn.googlesource.com/gn/+log for the latest changes.
-%global commit e0afadf7a743d5b14737bd454df45d5f1caf0d23
-%global access 20211205
-%global shortcommit %(echo %{commit} | cut -b -8)
-Version:        1953
+%global commit 5e19d2fb166fbd4f6f32147fbb2f497091a54ad8
+%global access 20231220
+%global shortcommit %(c='%{commit}'; echo "${c:0:12}")
+Version:        2077
 Release:        %autorelease -s %{access}git%{shortcommit}
 Summary:        Meta-build system that generates build files for Ninja
 
-# BSD except for src/base/third_party/icu/, which is (Unicode and MIT); note
-# that the “ICU License” is MIT,
-# https://fedoraproject.org/wiki/Licensing:MIT#Modern_style_.28ICU_Variant.29
+# The entire source is BSD-3-Clause, except:
+#   - src/base/third_party/icu/ is (Unicode-DFS-2016 AND ICU); see
+#     src/base/third_party/icu/LICENSE and also the header comment in
+#     src/base/third_party/icu/icu_utf.h.
 #
-# Note that src/util/test/gn_test.cc, which is licensed ASL 2.0, does not
-# contribute to the installed RPM, only to the gn_unittests executable; you may
-# verify this with:
+# Note that src/util/test/gn_test.cc, which is licensed Apache-2.0, does not
+# contribute to the binary RPMs, only to the gn_unittests executable, which is
+# not installed; you may verify this with:
 #   gdb -ex 'set pagination off' -ex 'info sources' gn | grep -F gn_test.cc
-License:        BSD and Unicode and MIT
+License:        BSD-3-Clause AND Unicode-DFS-2016 AND ICU
+SourceLicense:  %{license} AND Apache-2.0
 URL:            https://gn.googlesource.com/gn
 Source0:        %{url}/+archive/%{commit}.tar.gz#/gn-%{shortcommit}.tar.gz
 # Generated using script update-version:
 Source1:        last_commit_position.h
 Source2:        update-version
 
-# Stop overriding optimization flags
-Patch0:         gn-0153d369-no-O3.patch
+# Stop overriding optimization flags; not sent upstream because this is
+# intentional on their part
+Patch:          gn-0153d369-no-O3.patch
 
 BuildRequires:  python3-devel
 BuildRequires:  ninja-build
 BuildRequires:  gcc-c++
 
+# For RPM macros:
+BuildRequires:  emacs-common
+
 %if %{with html_docs}
 BuildRequires:  pandoc
 BuildRequires:  parallel
@@ -63,10 +69,22 @@ Requires:       vim-filesystem
 Requires:       python3
 Provides:       vim-gn = %{version}-%{release}
 
-BuildRequires:  emacs
 Requires:       emacs-filesystem >= %{_emacs_version}
 Provides:       emacs-gn = %{version}-%{release}
 
+# src/base/third_party/icu/icu_utf.h:
+#
+#   This file has the relevant components from ICU copied to handle basic
+#   UTF8/16/32 conversions. Components are copied from umachine.h, utf.h,
+#   utf8.h, and utf16.h into icu_utf.h.
+#
+# The forked, bundled ICU components are copied from Chromium. Because of the
+# downstream changes (primarily, changing namespaces and symbol prefixes),
+# there is no clear path to unbundling.
+#
+# See src/base/third_party/icu/README.chromium, from which the version number
+# is taken.
+Provides:       bundled(icu) = 60
 
 %description
 GN is a meta-build system that generates build files for Ninja.
@@ -98,14 +116,17 @@ cp -vp misc/vim/README.md README-vim.md
 %build
 AR='gcc-ar'; export AR
 %set_build_flags
+# Treating warnings as errors is too strict for downstream builds.
+#
 # Both --use-icf and --use-lto add compiler flags that only work with clang++,
 # not with g++. We do get LTO on Fedora anyway, since we respect the
 # distribution’s build flags.
 %{python3} build/gen.py \
+    --allow-warnings \
     --no-last-commit-position \
     --no-strip \
     --no-static-libstdc++
-ninja -C out -v
+ninja -j %{_smp_build_ncpus} -C out -v
 
 %if %{with html_docs}
 # There is a script, misc/help_as_html.py, that generates some HTML help, but
@@ -168,17 +189,17 @@ grep -E '^#define[[:blank:]]+LAST_COMMIT_POSITION[[:blank:]]+'\
 
 
 %files doc
-%license LICENSE
+%license LICENSE src/base/third_party/icu/README.chromium
 %doc AUTHORS
 %doc OWNERS
 %doc README*.md
 %if %{with html_docs}
 %doc README*.html
 %endif
-%doc docs
-%doc examples
-%doc infra
-%doc tools
+%doc docs/
+%doc examples/
+%doc infra/
+%doc tools/
 
 
 %changelog
diff --git a/last_commit_position.h b/last_commit_position.h
index d71ef29..1eb41de 100644
--- a/last_commit_position.h
+++ b/last_commit_position.h
@@ -3,7 +3,7 @@
 #ifndef OUT_LAST_COMMIT_POSITION_H_
 #define OUT_LAST_COMMIT_POSITION_H_
 
-#define LAST_COMMIT_POSITION_NUM 1953
-#define LAST_COMMIT_POSITION "1953 (e0afadf7)"
+#define LAST_COMMIT_POSITION_NUM 2077
+#define LAST_COMMIT_POSITION "2077 (5e19d2fb166f)"
 
 #endif  // OUT_LAST_COMMIT_POSITION_H_
diff --git a/sources b/sources
index 8d57f1c..6782902 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gn-e0afadf7.tar.gz) = 240c23311efad56c70e0f7e1639f709ca56ae375fea6293a93167029b40759b584fc865a9ad9799f5bb4b04a2e55c6be21d0278a214d5601350df4f280e63c96
+SHA512 (gn-5e19d2fb166f.tar.gz) = 618fc914f21721f819a232430862b4a42ef68cf6d8fe5e354aae3d9ebb30f92bd3d74b0079f1b37f987a9687a37c4cad2d57782cd27ca8a1fea3b461a921866e