Windows and Linux build environments; check clean on both (E-01)

MuPDF builds with MSBuild on Windows (/MT, OpenSSL from vcpkg);
Git for Windows' MinGit stands in for the source build there. CEF
loads from where libcef lives and sets its API version first on
every platform. File identity on Windows compares volume and index.
The checkout and reference/ keep LF on Windows.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/build-libreoffice.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Builds the pinned LibreOffice with the macOS LOK patches.
+# Builds the pinned LibreOffice with Ely's LOK patches.
 set -euo pipefail
 
 root=$(cd "$(dirname "$0")/.." && pwd)
@@ -40,10 +40,44 @@ options=(
   --with-myspell-dicts
 )
 
-[ "$(uname)" = Darwin ] || {
-  echo "build-libreoffice.sh: macOS only; Linux and Windows use the TDF builds" >&2
-  exit 1
-}
+case $(uname) in
+  Darwin)
+    app=$src/instdir/LibreOffice.app/Contents/Resources
+    jobs=$(sysctl -n hw.ncpu)
+    ;;
+  Linux)
+    # Collabora's LOKit set: headless, bundled libraries.
+    options+=(
+      --disable-gui
+      --enable-cairo-rgba
+      --disable-dbus
+      --disable-gio
+      --disable-dconf
+      --disable-randr
+      --disable-gstreamer-1-0
+      --without-system-cairo
+      --without-system-fontconfig
+      --without-system-freetype
+      --without-system-graphite
+      --without-system-harfbuzz
+      --without-system-openssl
+      --without-system-libpng
+      --without-system-libxml
+      --without-system-jpeg
+      --without-system-expat
+      --without-system-curl
+      --without-system-icu
+      --without-system-nss
+      --without-system-zlib
+    )
+    app=$src/instdir/share
+    jobs=$(nproc)
+    ;;
+  *)
+    echo "build-libreoffice.sh: no build for $(uname)" >&2
+    exit 1
+    ;;
+esac
 if [ ! -d "$src/.git" ]; then
   git init -q "$src"
   git -C "$src" remote add origin https://github.com/LibreOffice/core.git
@@ -59,21 +93,23 @@ git -C "$src" submodule update -q --init --depth 1 dictionaries
 }
 "$root/scripts/apply-lo-patches.sh" "$src"
 
-for tool in make gnu-sed bison flex gettext; do
-  prefix=$(brew --prefix "$tool")
-  PATH=$prefix/libexec/gnubin:$prefix/bin:$PATH
-done
-export PATH PKG_CONFIG_LIBDIR=/var/empty PKG_CONFIG_PATH=
+if [ "$(uname)" = Darwin ]; then
+  for tool in make gnu-sed bison flex gettext; do
+    prefix=$(brew --prefix "$tool")
+    PATH=$prefix/libexec/gnubin:$prefix/bin:$PATH
+  done
+  export PATH PKG_CONFIG_LIBDIR=/var/empty PKG_CONFIG_PATH=
+fi
 
 cd "$src"
 if [ ! -f config_host.mk ] || ! printf '%s\n' "${options[@]}" | cmp -s - autogen.lastrun; then
   ./autogen.sh "${options[@]}"
 fi
-make -j"$(sysctl -n hw.ncpu)"
+make -j"$jobs"
 
 # Bundled dictionaries: English only; each one slows LOK start (PERF-01).
 keep=(dict-en)
-extensions=$src/instdir/LibreOffice.app/Contents/Resources/extensions
+extensions=$app/extensions
 for dict in "$extensions"/dict-*; do
   name=$(basename "$dict")
   if [[ " ${keep[*]} " != *" $name "* ]]; then
@@ -82,6 +118,8 @@ for dict in "$extensions"/dict-*; do
 done
 echo "build-libreoffice.sh: dictionaries kept: $(ls "$extensions" | tr '\n' ' ')"
 # Ely's kernel defaults: Excel A1 formulas.
-cp "$root/packaging/libreoffice/ely.xcd" "$src/instdir/LibreOffice.app/Contents/Resources/registry/"
+cp "$root/packaging/libreoffice/ely.xcd" "$app/registry/"
 
-"$root/scripts/inert-lo.sh" "$src/instdir/LibreOffice.app"
+if [ "$(uname)" = Darwin ]; then
+  "$root/scripts/inert-lo.sh" "$src/instdir/LibreOffice.app"
+fi