lifemaps/qt6-migration-pipeline

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torstenandCopilot 256cfb6d87

Qt6 Migration CI / migrate (push) Waiting to run

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Update MIGRATION_STATUS.md with RTI C++23 compatibility blocker

Document RTI Connext DDS 7.7.0 header bugs preventing C++23 build:
- DDS_OctetSeq_get_contiguous_buffer (missing 's')
- DDS_SEQUENCE_INITIALIZER brace initialization

Workaround: BUILD_RTI=OFF until RTI provides C++23-compatible version

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Entire-Checkpoint: 01M0Q2920JAZDBK8GBJPAWCBFG

2026-08-23 12:22:20 +02:00

5.3 KiB

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Qt5/C++11 to Qt6/C++23 Migration Status

Last Updated: 2026-08-22 12:45 Session: 9364ea1f-2ece-4ccb-8e2d-77e7a8886a06

📊 Overall Status

Component	Status	Build	Tests	Notes
Lts/Common	✅ Complete	✅	✅ 1/1	Fully migrated
Lts/DDS	🟡 Structure only	⚠️ BUILD_RTI=OFF	?	RTI compatibility issues
Lts/Plugins	🟡 Partial	⚠️ BUILD_RTI=OFF	?	60 submodules
Lts/Projects	🟡 Structure only	⚠️ BUILD_RTI=OFF	?	5 submodules
Lts/Proxies	🟡 Structure only	⚠️ BUILD_RTI=OFF	?	13 submodules
Lts/Services	🟡 Structure only	⚠️ BUILD_RTI=OFF	?	47 submodules
TetraIF	🟡 Partial	⚠️ BUILD_RTI=OFF	?	Migration in progress
Z Modules	🟡 Partial	⚠️ BUILD_RTI=OFF	?	Some submodules done

🚨 Known Issues

RTI Connext DDS 7.7.0 C++23 Compatibility (BLOCKER)

Issue: RTI Connext DDS 7.7.0 headers contain bugs incompatible with C++20+:

Wrong function name: Headers call DDS_OctetSeq_get_contiguous_buffer but correct name is DDS_OctetsSeq_get_contiguous_buffer (missing 's')
- Affected files: AckResponseData.hpp, CorePolicy.hpp
C++20 brace initialization: DDS_SEQUENCE_INITIALIZER requires brace-enclosed initialization in C++20+
- Affected files: Vector.hpp, ContentFilteredTopicImpl.hpp, findImpl.hpp, discoveryImpl.hpp

Workaround:

Use C++17 standard (-DCMAKE_CXX_STANDARD=17) - but this defeats the C++23 migration goal
Patch RTI headers (not recommended for production)
Wait for RTI patch/newer version

Current Status: Building with BUILD_RTI=OFF to continue migration work. RTI-dependent modules will be built as stubs.

Files with RTI bugs:

/repo/external/rti_connext_dds-7.7.0/include/ndds/hpp/rti/sub/AckResponseData.hpp:162
/repo/external/rti_connext_dds-7.7.0/include/ndds/hpp/rti/core/policy/CorePolicy.hpp
/repo/external/rti_connext_dds-7.7.0/include/ndds/hpp/rti/core/Vector.hpp:68

ngl_codegen Dependency

Issue: ngl_codegen executable requires BUILD_GRANTLEE=ON (Grantlee5 is Qt5-based). The CODEGEN_IDL_SVC macro depends on ngl_codegen for IDL generation.

Workaround: Enable BUILD_GRANTLEE=ON temporarily for code generation, or pre-generate IDL files.

svcPdmCommon Target Ordering

Issue: Lts/Plugins/ProjectDataManagement/Gui/PdmComboBox references svcPdmCommon target before it's defined in Lts/Services/ProjectDataManagement.

Fix Required: Reorder CMakeLists.txt to process services before plugins when BUILD_RTI=ON.

✅ Completed Work

Build System Fixes (BUILD_RTI=OFF)

LtsUtilsSettings export header: Changed to angle brackets include
LtsWidgets CMakeLists.txt: Changed LtsUtilsSettings from PRIVATE to PUBLIC
BatteryNotification: Removed unused QDesktopWidget include
DDS Modules: Added proper BUILD_RTI guards to 6 CMakeLists.txt files
Field naming: Renamed fields to m_ prefix in training_area_telegrams.h
Target ordering: Added Lts/Services/ProjectDataManagement before Lts/Plugins/ProjectDataManagement for TetraIF

Git Operations

Submodule qt-migration-legatus on branch feature/qt6-migration-basis-modules
Main repo remote corrected to git@devel:lifemaps/qt6-migration-pipeline.git
Merge conflicts resolved

Infrastructure

Docker image migration-pipeline:ubuntu26.04 with Qt 6.8.3
RTI Connext DDS 7.7.0 installed at /repo/external/rti_connext_dds-7.7.0
CI workflow configured with submodules: recursive

📝 Recent Changes

Commit: `2c0a0d3f` (main repo)

LtsUtilsSettings export header fix
LtsWidgets PUBLIC link fix
BatteryNotification QDesktopWidget removal
DDS module BUILD_RTI guards
training_area_telegrams.h field renaming
CMakeLists.txt target ordering fix

Commit: c042faae (submodule)

Basis modules migration

🔄 Next Steps

Fix svcPdmCommon target ordering - Ensure services processed before plugins
Continue module migration - Focus on non-RTI dependent modules
Field access updates - Update all source files using renamed fields
Automated status updates - Implement cron job for MIGRATION_STATUS.md
RTI resolution - Contact RTI support for C++23 compatibility patch or workaround

🛠️ Build Commands

BUILD_RTI=OFF (Working)

docker run --rm -v $(pwd):/repo migration-pipeline:ubuntu26.04 \
  cmake -S /repo/qt-migration-legatus/qt6-after/qt6-migrated-legatus \
        -B /repo/build -G Ninja \
        -DCMAKE_BUILD_TYPE=Debug \
        -DCMAKE_PREFIX_PATH=/opt/Qt/6.8.3/gcc_64 \
        -DBUILD_RTI=OFF

docker run --rm -v $(pwd):/repo migration-pipeline:ubuntu26.04 \
  cmake --build /repo/build --parallel

BUILD_RTI=ON (Blocked by RTI C++23 issues)

# Currently fails due to RTI header bugs
# Would require C++17 or RTI header patches

📈 Migration Progress

Modules fully migrated: 1 (Lts/Common)
Modules with structure: 6 (DDS, Plugins, Projects, Proxies, Services, TetraIF partial)
Build status: ✅ BUILD_RTI=OFF, ⚠️ BUILD_RTI=ON blocked
Test status: 1/1 tests passing (Lts/Common)

Generated: 2026-08-22 12:45 Next auto-update: After 4 hours or at next milestone

5.3 KiB Raw Blame History