add qt5 package (#55)

Qt 5.15.18-lts-lgpl (QtBase + QtCharts) built from source as shared
libraries. Provides headers, shared libs, and tools (moc, rcc, uic)
for building cabana in openpilot without system Qt5 packages.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

qt5/build.sh

@@ -0,0 +1,117 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+QT_VERSION="5.15.18"
+QT_TAG="v${QT_VERSION}-lts-lgpl"
+INSTALL_DIR="$DIR/qt5/install"
+NJOBS="$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 2)"
+
+# Install build dependencies
+if [[ "$(uname)" == "Linux" ]]; then
+  if command -v dnf &>/dev/null; then
+    dnf install -y \
+      mesa-libGL-devel \
+      fontconfig-devel \
+      freetype-devel \
+      libxcb-devel \
+      xcb-util-devel \
+      xcb-util-image-devel \
+      xcb-util-keysyms-devel \
+      xcb-util-renderutil-devel \
+      xcb-util-wm-devel \
+      libxkbcommon-devel \
+      libxkbcommon-x11-devel \
+      libX11-devel \
+      perl-IPC-Cmd
+  elif command -v apt-get &>/dev/null; then
+    if [ "$(id -u)" -eq 0 ]; then
+      apt-get update && apt-get install -y \
+        libgl-dev \
+        libfontconfig1-dev libfreetype-dev \
+        libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev \
+        libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev \
+        libxcb-sync-dev libxcb-xfixes0-dev libxcb-shape0-dev \
+        libxcb-randr0-dev libxcb-render-util0-dev \
+        libxcb-xinerama0-dev libxcb-xkb-dev \
+        libxkbcommon-dev libxkbcommon-x11-dev \
+        libx11-xcb-dev
+    else
+      sudo apt-get update && sudo apt-get install -y \
+        libgl-dev \
+        libfontconfig1-dev libfreetype-dev \
+        libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev \
+        libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev \
+        libxcb-sync-dev libxcb-xfixes0-dev libxcb-shape0-dev \
+        libxcb-randr0-dev libxcb-render-util0-dev \
+        libxcb-xinerama0-dev libxcb-xkb-dev \
+        libxkbcommon-dev libxkbcommon-x11-dev \
+        libx11-xcb-dev
+    fi
+  fi
+fi
+
+# Clone/update qtbase
+if [ ! -d "qtbase-src/.git" ]; then
+  rm -rf qtbase-src
+  git clone --depth 1 https://code.qt.io/qt/qtbase.git qtbase-src
+fi
+git -C qtbase-src fetch --depth 1 origin "$QT_TAG"
+git -C qtbase-src checkout --force FETCH_HEAD
+
+# Build qtbase
+cd qtbase-src
+./configure \
+  -release \
+  -prefix "$INSTALL_DIR" \
+  -opensource -confirm-license \
+  -nomake examples \
+  -nomake tests \
+  -no-dbus \
+  -no-icu \
+  -opengl desktop
+make -j"$NJOBS"
+make install
+cd "$DIR"
+
+# Clone/update qtcharts
+if [ ! -d "qtcharts-src/.git" ]; then
+  rm -rf qtcharts-src
+  git clone --depth 1 https://code.qt.io/qt/qtcharts.git qtcharts-src
+fi
+git -C qtcharts-src fetch --depth 1 origin "$QT_TAG"
+git -C qtcharts-src checkout --force FETCH_HEAD
+
+# Build qtcharts
+cd qtcharts-src
+"$INSTALL_DIR/bin/qmake"
+make -j"$NJOBS"
+make install
+cd "$DIR"
+
+# Replace symlinks with copies for wheel compatibility
+find "$INSTALL_DIR" -type l | while read -r link; do
+  target="$(readlink -f "$link")"
+  if [ -f "$target" ]; then
+    rm "$link"
+    cp "$target" "$link"
+  elif [ -d "$target" ]; then
+    rm "$link"
+    cp -r "$target" "$link"
+  fi
+done
+
+# Strip binaries and libraries
+find "$INSTALL_DIR" -type f -name '*.so*' -exec strip --strip-unneeded {} + 2>/dev/null || true
+find "$INSTALL_DIR" -type f -name '*.dylib' -exec strip -x {} + 2>/dev/null || true
+strip "$INSTALL_DIR/bin/moc" "$INSTALL_DIR/bin/rcc" "$INSTALL_DIR/bin/uic" 2>/dev/null || true
+
+# Remove unnecessary files to reduce wheel size
+rm -rf "$INSTALL_DIR/doc" "$INSTALL_DIR/mkspecs" "$INSTALL_DIR/lib/cmake" "$INSTALL_DIR/lib/pkgconfig"
+find "$INSTALL_DIR/lib" -name '*.prl' -delete 2>/dev/null || true
+find "$INSTALL_DIR/lib" -name '*.la' -delete 2>/dev/null || true
+
+echo "Installed Qt5 to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"