Feature/flatpak clang llvm21 (#12727)

* Fix GIT_COMMIT_HASH not set in Flatpak builds

The env var check was gated inside the .git directory check, so
Flatpak builds (which exclude .git from the sandbox) always fell
back to "0000000". Lift the env var check to top level and inject
the commit hash into the Flatpak manifest via build-options.env.

* Switch Flatpak build to Clang/LLD via LLVM 21 SDK extension

- Add org.freedesktop.Sdk.Extension.llvm21
- Bump runtime to GNOME 49 (SDK 25.08) for llvm21 availability

* fix build errors and improving build speed for flatpak

* fxi more build errors

* Update error messages for GNOME Platform and SDK versions

.github/workflows/build_all.yml

@@ -134,7 +134,7 @@ jobs:
   flatpak:
     name: "Flatpak"
     container:
-      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-48
+      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-49
       options: --privileged
       volumes:
         - /usr/local/lib/android:/usr/local/lib/android
@@ -194,7 +194,12 @@ jobs:
         restore-keys: flatpak-builder-${{ matrix.variant.arch }}-
     - name: Disable debug info for faster CI builds
       run: |
-        sed -i '0,/^finish-args:/s//build-options:\n  no-debuginfo: true\n  strip: true\nfinish-args:/' \
+        sed -i '/^build-options:/a\  no-debuginfo: true\n  strip: true' \
+          scripts/flatpak/io.github.orcaslicer.OrcaSlicer.yml
+      shell: bash
+    - name: Inject git commit hash into Flatpak manifest
+      run: |
+        sed -i "/name: OrcaSlicer/{n;s|buildsystem: simple|buildsystem: simple\n    build-options:\n      env:\n        git_commit_hash: \"$git_commit_hash\"|}" \
           scripts/flatpak/io.github.orcaslicer.OrcaSlicer.yml
       shell: bash
     - name: Inject git commit hash into Flatpak manifest

CMakeLists.txt

@@ -173,10 +173,7 @@ option(BUILD_TESTS       "Build unit tests" OFF)
 option(ORCA_TOOLS       "Build Orca tools" OFF)
 
 if (FLATPAK)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++20")
-    set(SLIC3R_PCH OFF CACHE BOOL "" FORCE)
     set(SLIC3R_FHS ON CACHE BOOL "" FORCE)
-    set(BUILD_TESTS OFF CACHE BOOL "" FORCE)
     set(SLIC3R_DESKTOP_INTEGRATION OFF CACHE BOOL "" FORCE)
 endif ()
 
@@ -457,9 +454,12 @@ if (NOT MSVC AND ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMP
         add_compile_options(-Wno-unknown-pragmas)
     endif()
 
-    # Bit of a hack for flatpak building: compress the debug info with zstd to save space in CI
+    # Compress the debug info with zstd to save space in Flatpak CI builds
-    if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 13.0)
+    if(FLATPAK)
-        add_compile_options(-gz=zstd)
+        if(("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 13.0) OR
+           ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 15.0))
+            add_compile_options(-gz=zstd)
+        endif()
     endif()
 
     if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 14)

build_flatpak.sh

@@ -198,22 +198,22 @@ echo -e "${GREEN}All required dependencies found${NC}"
 # Install runtime and SDK if requested
 if [[ "$INSTALL_RUNTIME" == true ]]; then
     echo -e "${YELLOW}Installing GNOME runtime and SDK...${NC}"
-    flatpak install --user -y flathub org.gnome.Platform//48
+    flatpak install --user -y flathub org.gnome.Platform//49
-    flatpak install --user -y flathub org.gnome.Sdk//48
+    flatpak install --user -y flathub org.gnome.Sdk//49
 fi
 
 # Check if required runtime is available
-if ! flatpak info --user org.gnome.Platform//48 &> /dev/null; then
+if ! flatpak info --user org.gnome.Platform//49 &> /dev/null; then
-    echo -e "${RED}Error: GNOME Platform 48 runtime is not installed.${NC}"
+    echo -e "${RED}Error: GNOME Platform 49 runtime is not installed.${NC}"
     echo "Run with -i flag to install it automatically, or install manually:"
-    echo "flatpak install --user flathub org.gnome.Platform//48"
+    echo "flatpak install --user flathub org.gnome.Platform//49"
     exit 1
 fi
 
-if ! flatpak info --user org.gnome.Sdk//48 &> /dev/null; then
+if ! flatpak info --user org.gnome.Sdk//49 &> /dev/null; then
-    echo -e "${RED}Error: GNOME SDK 48 is not installed.${NC}"
+    echo -e "${RED}Error: GNOME SDK 49 is not installed.${NC}"
     echo "Run with -i flag to install it automatically, or install manually:"
-    echo "flatpak install --user flathub org.gnome.Sdk//48"
+    echo "flatpak install --user flathub org.gnome.Sdk//49"
     exit 1
 fi
 
@@ -318,7 +318,7 @@ fi
 MANIFEST="scripts/flatpak/io.github.orcaslicer.OrcaSlicer.yml"
 if [[ "$NO_DEBUGINFO" == true ]]; then
     MANIFEST="scripts/flatpak/io.github.orcaslicer.OrcaSlicer.no-debug.yml"
-    sed '0,/^finish-args:/s//build-options:\n  no-debuginfo: true\n  strip: true\nfinish-args:/' \
+    sed '/^build-options:/a\  no-debuginfo: true\n  strip: true' \
         scripts/flatpak/io.github.orcaslicer.OrcaSlicer.yml > "$MANIFEST"
     echo -e "${YELLOW}Debug info disabled (using temp manifest)${NC}"
 fi

deps/CMakeLists.txt

@@ -189,6 +189,9 @@ if (NOT IS_CROSS_COMPILE OR NOT APPLE)
             -DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
             -DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
             -DCMAKE_TOOLCHAIN_FILE:STRING=${CMAKE_TOOLCHAIN_FILE}
+            -DCMAKE_EXE_LINKER_FLAGS:STRING=${CMAKE_EXE_LINKER_FLAGS}
+            -DCMAKE_SHARED_LINKER_FLAGS:STRING=${CMAKE_SHARED_LINKER_FLAGS}
+            -DCMAKE_MODULE_LINKER_FLAGS:STRING=${CMAKE_MODULE_LINKER_FLAGS}
             -DBUILD_SHARED_LIBS:BOOL=OFF
             ${_cmake_osx_arch}
             "${_configs_line}"

deps/TBB/TBB.cmake

@@ -1,4 +1,4 @@
-if (FLATPAK)
+if (FLATPAK AND "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     set(_patch_command ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_LIST_DIR}/GNU.cmake ./cmake/compilers/GNU.cmake)
 else()
     set(_patch_command "")

scripts/flatpak/io.github.orcaslicer.OrcaSlicer.yml

@@ -1,10 +1,19 @@
 app-id: io.github.orcaslicer.OrcaSlicer
 runtime: org.gnome.Platform
-runtime-version: "48"
+runtime-version: "49"
 sdk: org.gnome.Sdk
+sdk-extensions:
+  - org.freedesktop.Sdk.Extension.llvm21
 command: entrypoint
 separate-locales: true
 rename-icon: OrcaSlicer
+build-options:
+  append-path: /usr/lib/sdk/llvm21/bin
+  prepend-ld-library-path: /usr/lib/sdk/llvm21/lib
+  env:
+    CC: clang
+    CXX: clang++
+    LDFLAGS: "-fuse-ld=lld"
 finish-args:
   - --share=ipc
   - --socket=x11
@@ -38,6 +47,8 @@ modules:
         sha256: e305b9f07f52743ca481da0a4e0c76c35efd60adaf1b0694eb3bb021e2137e39
 
   - name: glu
+    build-options:
+      cxxflags: -Wno-register
     config-opts:
       - --disable-static
     sources:
@@ -70,6 +81,9 @@ modules:
   # Config-opts mirror deps/wxWidgets/wxWidgets.cmake with FLATPAK=ON, DEP_WX_GTK3=ON
   - name: wxWidgets
     buildsystem: cmake-ninja
+    build-options:
+      env:
+        CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     config-opts:
       - -DCMAKE_BUILD_TYPE=Release
       - -DwxBUILD_PRECOMP=ON
@@ -99,6 +113,9 @@ modules:
       - -DwxUSE_LIBJPEG=sys
       - -DwxUSE_LIBTIFF=OFF
       - -DwxUSE_EXPAT=sys
+      - -DCMAKE_EXE_LINKER_FLAGS=-fuse-ld=lld
+      - -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=lld
+      - -DCMAKE_MODULE_LINKER_FLAGS=-fuse-ld=lld
     sources:
       - type: git
         url: https://github.com/SoftFever/Orca-deps-wxWidgets
@@ -118,7 +135,10 @@ modules:
           -DDEP_DOWNLOAD_DIR=/run/build/orca_deps/external-packages \
           -DCMAKE_PREFIX_PATH=/app \
           -DDESTDIR=/app \
-          -DCMAKE_INSTALL_PREFIX=/app
+          -DCMAKE_INSTALL_PREFIX=/app \
+          -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
+          -DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=lld" \
+          -DCMAKE_MODULE_LINKER_FLAGS="-fuse-ld=lld"
       - cmake --build $BUILD_DIR --parallel
       - rm -rf /run/build/orca_deps/external-packages
 
@@ -290,7 +310,10 @@ modules:
           -DFLATPAK=ON \
           -DCMAKE_BUILD_TYPE=Release \
           -DCMAKE_PREFIX_PATH=/app \
-          -DCMAKE_INSTALL_PREFIX=/app
+          -DCMAKE_INSTALL_PREFIX=/app \
+          -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
+          -DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=lld" \
+          -DCMAKE_MODULE_LINKER_FLAGS="-fuse-ld=lld"
       - cmake --build build_flatpak --target OrcaSlicer -j$FLATPAK_BUILDER_N_JOBS
       - ./scripts/run_gettext.sh
       - cmake --build build_flatpak --target install -j$FLATPAK_BUILDER_N_JOBS

src/slic3r/CMakeLists.txt

@@ -791,9 +791,8 @@ if (UNIX AND NOT APPLE)
         # I don't know why this is needed, but for whatever reason slic3r isn't
         # linking to X11 and webkit2gtk. force it.
         find_package(X11 REQUIRED)
-        find_package(PkgConfig REQUIRED)
         pkg_check_modules(webkit2gtk REQUIRED webkit2gtk-4.1)
-        target_link_libraries (libslic3r_gui ${X11_LIBRARIES} ${webkit2gtk_LIBRARIES})
+        target_link_libraries(libslic3r_gui ${X11_LIBRARIES} ${webkit2gtk_LIBRARIES})
     endif()
     target_include_directories(libslic3r_gui SYSTEM PRIVATE ${GTK${SLIC3R_GTK}_INCLUDE_DIRS} ${LIBSECRET_INCLUDE_DIRS})
     target_link_libraries(libslic3r_gui ${GTK${SLIC3R_GTK}_LIBRARIES} fontconfig ${LIBSECRET_LIBRARIES})

src/slic3r/GUI/MediaPlayCtrl.h

@@ -67,10 +67,10 @@ private:
     static bool get_stream_url(std::string *url = nullptr);
 
 private:
-    static const wxMediaState MEDIASTATE_IDLE = (wxMediaState) 3;
+    static inline const wxMediaState MEDIASTATE_IDLE = static_cast<wxMediaState>(3);
-    static const wxMediaState MEDIASTATE_INITIALIZING = (wxMediaState) 4;
+    static inline const wxMediaState MEDIASTATE_INITIALIZING = static_cast<wxMediaState>(4);
-    static const wxMediaState MEDIASTATE_LOADING = (wxMediaState) 5;
+    static inline const wxMediaState MEDIASTATE_LOADING = static_cast<wxMediaState>(5);
-    static const wxMediaState MEDIASTATE_BUFFERING = (wxMediaState) 6;
+    static inline const wxMediaState MEDIASTATE_BUFFERING = static_cast<wxMediaState>(6);
 
     // token
     std::shared_ptr<int> m_token = std::make_shared<int>(0);