chore: Add fully static qtox build.

.ci-scripts/build-qtox-linux-static.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -eux
+
+cmake \
+  -DCMAKE_TOOLCHAIN_FILE=/sysroot/static-toolchain.cmake \
+  -DCMAKE_PREFIX_PATH=/sysroot/opt/qt/lib/cmake \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DSPELL_CHECK=OFF \
+  -DUPDATE_CHECK=ON \
+  -DSTRICT_OPTIONS=ON \
+  -DBUILD_TESTING=OFF \
+  -DFULLY_STATIC=ON \
+  -GNinja \
+  -B_build \
+  -H.
+
+cmake --build _build
+
+ls -lh _build/qtox
+file _build/qtox
+QT_QPA_PLATFORM=offscreen _build/qtox --help

.github/workflows/build-test-deploy.yaml

@@ -86,6 +86,25 @@ jobs:
       - name: Run build
         run: docker-compose run --rm alpine ./.ci-scripts/build-qtox-linux.sh --build-type ${{ matrix.build_type }} --${{ matrix.features }}
 
+  build-alpine-static:
+    name: Alpine (static)
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        build_type: [Release]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ${{ github.job }}
+          append-timestamp: false
+      - name: Install docker-compose
+        run: sudo apt-get install -y docker-compose
+      - name: Run build
+        run: docker-compose run --rm alpine-static ./.ci-scripts/build-qtox-linux-static.sh --build-type ${{ matrix.build_type }}
+
   build-debian:
     name: Debian
     if: github.event_name == 'pull_request'

CMakeLists.txt

@@ -25,6 +25,9 @@ option(ASAN "Compile with AddressSanitizer" OFF)
 option(TSAN "Compile with ThreadSanitizer" OFF)
 option(UBSAN "Compile with UndefinedBehaviorSanitizer" OFF)
 option(STRICT_OPTIONS "Error on compile warning, used by CI" OFF)
+option(BUILD_TESTING "Enable tests (turn OFF for static builds)" ON)
+option(FULLY_STATIC
+       "Produce a fully statically linked qTox binary (experimental)" OFF)
 option(GUI_TESTS
        "Enable GUI rendering tests, likely tied to a specific Qt version" OFF)
 
@@ -654,7 +657,20 @@ set_target_properties(
              QT_ANDROID_PACKAGE_SOURCE_DIR
              "${CMAKE_CURRENT_SOURCE_DIR}/android/${Qt6Core_VERSION}")
 
-include(Testing)
+if(FULLY_STATIC)
+  target_link_directories(${PROJECT_NAME} PRIVATE
+                          "/sysroot/opt/qt/plugins/platforms")
+  target_link_libraries(
+    ${PROJECT_NAME}
+    PRIVATE Qt6::QLinuxFbIntegrationPlugin Qt6::QOffscreenIntegrationPlugin
+            Qt6::QVncIntegrationPlugin Qt6::QXcbGlxIntegrationPlugin
+            Qt6::QXcbIntegrationPlugin Qt6::QWaylandIntegrationPlugin)
+  target_link_options(${PROJECT_NAME} PRIVATE -static)
+endif()
+
+if(BUILD_TESTING)
+  include(Testing)
+endif()
 include(Installation)
 
 if(DEFINED ENV{IN_NIX_SHELL})

cmake/Dependencies.cmake

@@ -131,7 +131,7 @@ if(SPELL_CHECK)
 endif()
 
 # Try to find cmake toxcore libraries
-if(WIN32 OR ANDROID)
+if(WIN32 OR ANDROID OR FULLY_STATIC)
   search_dependency(TOXCORE             PACKAGE toxcore             LIBRARY toxcore          OPTIONAL STATIC_PACKAGE MINIMUM_VERSION ${TOXCORE_MINIMUM_VERSION})
 else()
   search_dependency(TOXCORE             PACKAGE toxcore             LIBRARY toxcore          OPTIONAL MINIMUM_VERSION ${TOXCORE_MINIMUM_VERSION})

docker-compose.yml

@@ -24,6 +24,9 @@ services:
   alpine:
     image: toxchat/qtox:alpine
     <<: *shared_params
+  alpine-static:
+    image: toxchat/qtox:alpine-static
+    <<: *shared_params
   android_builder.armeabi-v7a.debug_6.2.4:
     image: toxchat/qtox:android-builder.armeabi-v7a.debug_6.2.4
     <<: *shared_params

src/main.cpp

@@ -7,6 +7,7 @@
 
 #include <QDebug>
 #include <QGuiApplication>
+#include <QtPlugin>
 
 int main(int argc, char* argv[])
 {
@@ -16,3 +17,12 @@ int main(int argc, char* argv[])
     qDebug() << "Exit with status" << errorcode;
     return errorcode;
 }
+
+#ifdef QT_STATIC
+Q_IMPORT_PLUGIN(QLinuxFbIntegrationPlugin)
+Q_IMPORT_PLUGIN(QOffscreenIntegrationPlugin)
+Q_IMPORT_PLUGIN(QXcbIntegrationPlugin)
+Q_IMPORT_PLUGIN(QXcbGlxIntegrationPlugin)
+Q_IMPORT_PLUGIN(QVncIntegrationPlugin)
+Q_IMPORT_PLUGIN(QWaylandIntegrationPlugin)
+#endif