feat: add option to use mold to build deps on linux

.github/workflows/build_orca.yml

@@ -1,22 +1,22 @@
 on:
-  workflow_call:
-    inputs:
-      cache-key:
-        required: false
-        type: string
-      cache-path:
-        required: false
-        type: string
-      os:
-        required: true
-        type: string
-      arch:
-        required: false
-        type: string
-      macos-combine-only:
-        required: false
-        type: boolean
-        default: false
+    workflow_call:
+      inputs:
+        cache-key:
+          required: false
+          type: string
+        cache-path:
+          required: false
+          type: string
+        os:
+          required: true
+          type: string
+        arch:
+          required: false
+          type: string
+        macos-combine-only:
+          required: false
+          type: boolean
+          default: false
 
 jobs:
   build_orca:
@@ -26,8 +26,8 @@ jobs:
       date:
       ver:
       ver_pure:
-      ubuntu-ver: "2404"
-      ubuntu-ver-str: "_Ubuntu2404"
+      ubuntu-ver: '2404'
+      ubuntu-ver-str: '_Ubuntu2404'
       ORCA_UPDATER_SIG_KEY: ${{ secrets.ORCA_UPDATER_SIG_KEY }}
       # Branches whose builds are published to the nightly release. The
       # belt-printer branch ships alongside main but its assets carry a `_belt`
@@ -39,7 +39,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
         with:
-          lfs: "false"
+          lfs: 'false'
 
       - name: load cached deps
         if: ${{ !(runner.os == 'macOS' && inputs.macos-combine-only) }}
@@ -53,8 +53,8 @@ jobs:
         # The windows-11-arm runner needs CMake <= 3.31 (handled in the next step).
         if: ${{ !(runner.os == 'Windows' && inputs.arch == 'arm64') }}
         with:
-          cmakeVersion: "~4.3.0" # use most recent 4.3.x version
-          useLocalCache: true # <--= Use the local cache (default is 'false').
+          cmakeVersion: "~4.3.0"  # use most recent 4.3.x version
+          useLocalCache: true         # <--= Use the local cache (default is 'false').
           useCloudCache: true
 
       - name: Install CMake 3.31.x (Windows ARM64)
@@ -120,7 +120,7 @@ jobs:
           echo "date: ${{ env.date }} version: ${{ env.ver }}"
         shell: pwsh
 
-      #   Mac
+#   Mac
       - name: Install tools mac
         if: runner.os == 'macOS' && !inputs.macos-combine-only
         run: |
@@ -206,7 +206,7 @@ jobs:
         run: |
           ./build_release_macos.sh -u -x ${{ !vars.SELF_HOSTED && '-1' || '' }} -a universal -t 10.15
 
-      # Thanks to RaySajuuk, it's working now
+ # Thanks to RaySajuuk, it's working now
       - name: Sign app and notary
         if: github.repository == 'OrcaSlicer/OrcaSlicer' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/belt-printer' || startsWith(github.ref, 'refs/heads/release/')) && runner.os == 'macOS' && inputs.macos-combine-only
         working-directory: ${{ github.workspace }}
@@ -265,7 +265,7 @@ jobs:
           if [ -f "${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app/Contents/MacOS/OrcaSlicer_profile_validator" ]; then
             sign_app "${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app"
           fi
-
+          
           # Create main OrcaSlicer DMG without the profile validator helper
           mkdir -p ${{ github.workspace }}/build/universal/OrcaSlicer_dmg
           rm -rf ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/*
@@ -273,7 +273,7 @@ jobs:
           ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/Applications
           retry hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
           codesign --deep --force --verbose --options runtime --timestamp --entitlements "$ENTITLEMENTS" --sign "$CERTIFICATE_ID" OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
-
+          
           # Create separate OrcaSlicer_profile_validator DMG if the app exists
           if [ -f "${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app/Contents/MacOS/OrcaSlicer_profile_validator" ]; then
             mkdir -p ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg
@@ -283,7 +283,7 @@ jobs:
             retry hdiutil create -volname "OrcaSlicer Profile Validator" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg -ov -format UDZO OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
             codesign --deep --force --verbose --options runtime --timestamp --entitlements "$ENTITLEMENTS" --sign "$CERTIFICATE_ID" OrcaSlicer_profile_validator_Mac_universal_${{ env.ver }}.dmg
           fi
-
+          
           # Notarize main DMG
           xcrun notarytool submit "OrcaSlicer_Mac_universal_${{ env.ver }}.dmg" --apple-id "${{ secrets.APPLE_DEV_ACCOUNT }}" --team-id "${{ secrets.TEAM_ID }}" --password "${{ secrets.APP_PWD }}" --wait
           xcrun stapler staple OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
@@ -305,7 +305,7 @@ jobs:
           cp -R ${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer.app ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/
           ln -sfn /Applications ${{ github.workspace }}/build/universal/OrcaSlicer_dmg/Applications
           retry hdiutil create -volname "OrcaSlicer" -srcfolder ${{ github.workspace }}/build/universal/OrcaSlicer_dmg -ov -format UDZO OrcaSlicer_Mac_universal_${{ env.ver }}.dmg
-
+          
           # Create separate OrcaSlicer_profile_validator DMG if the app exists
           if [ -f "${{ github.workspace }}/build/universal/OrcaSlicer/OrcaSlicer_profile_validator.app/Contents/MacOS/OrcaSlicer_profile_validator" ]; then
             mkdir -p ${{ github.workspace }}/build/universal/OrcaSlicer_profile_validator_dmg
@@ -362,7 +362,7 @@ jobs:
           asset_content_type: application/octet-stream
           max_releases: 1
 
-      # Windows
+# Windows
       - name: Set Windows build variables
         if: runner.os == 'Windows'
         shell: pwsh
@@ -529,7 +529,7 @@ jobs:
           name: OrcaSlicer_Windows_MSIX_${{ env.ver }}${{ env.ARCH_SUFFIX }}
           path: ${{ github.workspace }}/${{ env.BUILD_DIR }}/OrcaSlicer_Windows_MSIX_${{ env.ver }}${{ env.ARCH_SUFFIX }}.msix
 
-      # Ubuntu
+# Ubuntu
       - name: Apt-Install Dependencies
         if: runner.os == 'Linux' && !vars.SELF_HOSTED
         uses: ./.github/actions/apt-install-deps
@@ -596,7 +596,7 @@ jobs:
         run: |
           test_repo_dir="${{ runner.temp }}/orca-test-repo"
           rm -rf "$test_repo_dir"
-          git clone --depth 1 --branch cli-test-suite https://github.com/OrcaSlicer/orca-test-repo.git "$test_repo_dir"
+          git clone --depth 1 https://github.com/OrcaSlicer/orca-test-repo.git "$test_repo_dir"
           python3 "$test_repo_dir/run_test.py" "${{ github.workspace }}/build/package/bin/orca-slicer"
 
       - name: Build orca_custom_preset_tests
@@ -620,7 +620,7 @@ jobs:
         uses: actions/upload-artifact@v7
         with:
           name: OrcaSlicer_profile_validator_Linux_ubuntu_${{ env.ubuntu-ver }}_${{ env.ver }}
-          path: "./build/src/Release/OrcaSlicer_profile_validator"
+          path: './build/src/Release/OrcaSlicer_profile_validator'
 
       - name: Deploy Ubuntu release
         if: ${{ github.repository == 'OrcaSlicer/OrcaSlicer' && ! env.ACT && env.deploy_nightly == 'true' && runner.os == 'Linux' && !vars.SELF_HOSTED }}

build_linux.sh

@@ -8,7 +8,7 @@ SCRIPT_PATH=$(dirname "$(readlink -f "${0}")")
 pushd "${SCRIPT_PATH}" > /dev/null
 
 function usage() {
-    echo "Usage: ./${SCRIPT_NAME} [-1][-b][-c][-d][-D][-e][-F][-g][-h][-i][-j N][-p][-r][-s][-t][-u][-l][-L]"
+    echo "Usage: ./${SCRIPT_NAME} [-1][-b][-c][-d][-D][-e][-F][-g][-h][-i][-j N][-p][-r][-s][-t][-u][-l][-L][-M]"
     echo "   -1: limit builds to one core (where possible)"
     echo "   -j N: limit builds to N cores (where possible)"
     echo "   -b: build in Debug mode"
@@ -28,6 +28,7 @@ function usage() {
     echo "   -u: install system dependencies (asks for sudo password; build prerequisite)"
     echo "   -l: use Clang instead of GCC (default: GCC)"
     echo "   -L: use ld.lld as linker (if available)"
+    echo "   -M: use mold as linker (if available)"
     echo "For a first use, you want to './${SCRIPT_NAME} -u'"
     echo "   and then './${SCRIPT_NAME} -dsi'"
     echo "For a GitHub Actions-like Linux build locally, use './${SCRIPT_NAME} -g -istrlL'"
@@ -41,7 +42,7 @@ unset name
 BUILD_DIR=build
 BUILD_CONFIG=Release
 FORWARDED_ARGS=()
-while getopts ":1j:bcCdDeFghiprstulL" opt ; do
+while getopts ":1j:bcCdDeFghiprstulLM" opt ; do
   case ${opt} in
     1 )
         export CMAKE_BUILD_PARALLEL_LEVEL=1
@@ -118,6 +119,10 @@ while getopts ":1j:bcCdDeFghiprstulL" opt ; do
         USE_LLD="1"
         FORWARDED_ARGS+=("-L")
         ;;
+    M )
+        USE_MOLD="1"
+        FORWARDED_ARGS+=("-M")
+        ;;
     * )
 	echo "Unknown argument '${opt}', aborting."
 	exit 1
@@ -135,6 +140,11 @@ if [[ -n "${CLEAN_DOCKER_IMAGE}" ]] && [[ -z "${USE_DOCKER}" ]] ; then
     exit 1
 fi
 
+if [[ -n "${USE_LLD}" ]] && [[ -n "${USE_MOLD}" ]] ; then
+    echo "Error: -L and -M are mutually exclusive."
+    exit 1
+fi
+
 function check_available_memory_and_disk() {
     FREE_MEM_GB=$(free --gibi --total | grep 'Mem' | rev | cut --delimiter=" " --fields=1 | rev)
     MIN_MEM_GB=10
@@ -504,6 +514,18 @@ if [[ -n "${USE_LLD}" ]] ; then
     fi
 fi
 
+# Configure use of mold as the linker when requested
+export CMAKE_MOLD_LINKER_ARGS=()
+if [[ -n "${USE_MOLD}" ]] ; then
+    if command -v mold >/dev/null 2>&1 ; then
+        MOLD_BIN=$(command -v mold)
+        export CMAKE_MOLD_LINKER_ARGS=(-DCMAKE_LINKER="${MOLD_BIN}" -DCMAKE_EXE_LINKER_FLAGS=-fuse-ld=mold -DCMAKE_SHARED_LINKER_FLAGS=-fuse-ld=mold -DCMAKE_MODULE_LINKER_FLAGS=-fuse-ld=mold)
+    else
+        echo "Error: mold not found. Please install the 'mold' package or omit -M."
+        exit 1
+    fi
+fi
+
 export CMAKE_CCACHE_ARGS=()
 CMAKE_CCACHE=${CMAKE_CCACHE:-}
 if [ -n "$CMAKE_CCACHE" ]; then
@@ -536,7 +558,7 @@ if [[ -n "${BUILD_DEPS}" ]] ; then
         BUILD_ARGS+=(-DCMAKE_BUILD_TYPE="${BUILD_CONFIG}")
     fi
 
-    print_and_run cmake -S deps -B deps/$BUILD_DIR "${CMAKE_C_CXX_COMPILER_CLANG[@]}" "${CMAKE_LLD_LINKER_ARGS[@]}" "${CMAKE_CCACHE_ARGS[@]}" -G Ninja "${COLORED_OUTPUT}" "${BUILD_ARGS[@]}"
+    print_and_run cmake -S deps -B deps/$BUILD_DIR "${CMAKE_C_CXX_COMPILER_CLANG[@]}" "${CMAKE_LLD_LINKER_ARGS[@]}" "${CMAKE_MOLD_LINKER_ARGS[@]}" "${CMAKE_CCACHE_ARGS[@]}" -G Ninja "${COLORED_OUTPUT}" "${BUILD_ARGS[@]}"
     print_and_run cmake --build deps/$BUILD_DIR -j1
 fi
 
@@ -556,7 +578,7 @@ if [[ -n "${BUILD_ORCA}" ]] || [[ -n "${BUILD_TESTS}" ]] ; then
         BUILD_ARGS+=(-DORCA_UPDATER_SIG_KEY="${ORCA_UPDATER_SIG_KEY}")
     fi
 
-    print_and_run cmake -S . -B $BUILD_DIR "${CMAKE_C_CXX_COMPILER_CLANG[@]}" "${CMAKE_LLD_LINKER_ARGS[@]}" "${CMAKE_CCACHE_ARGS[@]}" -G "Ninja Multi-Config" \
+    print_and_run cmake -S . -B $BUILD_DIR "${CMAKE_C_CXX_COMPILER_CLANG[@]}" "${CMAKE_LLD_LINKER_ARGS[@]}" "${CMAKE_MOLD_LINKER_ARGS[@]}" "${CMAKE_CCACHE_ARGS[@]}" -G "Ninja Multi-Config" \
 -DSLIC3R_PCH=${SLIC3R_PRECOMPILED_HEADERS} \
 -DORCA_TOOLS=ON \
 "${COLORED_OUTPUT}" \