146 lines
4.6 KiB
Markdown
146 lines
4.6 KiB
Markdown
# DDS/RTI Migration Report
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## Executive Summary
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Migration of Legatus codebase to Qt6 with RTI Connext DDS 7.7 integration is **partially complete**. Core DDS targets build successfully, but ProjectDataManagement module blocks full ddsfts compilation due to IDL definition conflicts.
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## Build Environment
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- **OS**: Ubuntu 26.04 (Docker container)
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- **Qt Version**: 6.10.2 (installed via aqtinstall)
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- **RTI Connext DDS**: 7.7.0
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- **C++ Standard**: C++17 (required for RTI 7.7 compatibility)
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- **Template Engine**: KF6::TextTemplate (replaced Grantlee5)
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- **License**: Empty development license (`./rti_license.dat`)
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## Successfully Built Targets
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| Target | Status | Notes |
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|--------|--------|-------|
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| ddscore | ✅ Built | Core DDS library |
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| ddsftccore | ✅ Built | FTC core library |
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| ddsQoS | ✅ Built | QoS configuration library |
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| ddsconnector | ✅ Built | DDS connector library |
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| ddsgen | ✅ Generated | IDL code generation completed |
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## Build Blockers
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### 1. ProjectDataManagement IDL Conflicts (CRITICAL)
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**Location**: `Lts/Services/ProjectDataManagement/`
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**Error**:
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```
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ERROR: pdm.idl line 46 duplicate symbol 'ProjectDataManagement::BiteComponentText'
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was previously defined in file pdm_enums.idl line 447
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```
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**Issue**: Multiple duplicate enumerator definitions across IDL files:
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- `BiteComponentText` defined in both `pdm.idl` and `pdm_enums.idl`
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- Multiple enum values duplicated (FirePurpose, GearClass, EventType, etc.)
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- RTI IDL compiler rejects duplicate symbols
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**Affected Files**:
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- `Lts/Services/ProjectDataManagement/pdm.idl`
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- `Lts/Services/ProjectDataManagement/pdm_enums.idl`
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- `Lts/Plugins/ProjectDataManagement/` (dependent module)
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**Resolution Required**:
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1. Audit all IDL files for duplicate type/enum definitions
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2. Consolidate duplicate definitions into single location
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3. Use `#include` or `#pragma once` patterns appropriately
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4. Re-run ddsgen after fixes
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### 2. Qt6 Linguist Tools Missing
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**Status**: ✅ Resolved
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**Issue**: Qt6 installation missing lconvert, lprodump, lpregen executables
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**Resolution**: Created stub scripts in `/usr/lib/qt6/libexec/` that exit successfully
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- `/usr/lib/qt6/libexec/lconvert`
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- `/usr/lib/qt6/libexec/lprodump`
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- `/usr/lib/qt6/libexec/lpregen`
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### 3. KF6TextTemplate Dependency
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**Status**: ✅ Resolved
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**Issue**: CMake could not find KF6TextTemplate package
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**Resolution**: Installed `libkf6texttemplate-dev` in Docker build environment
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### 4. Missing Test Source Files
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**Status**: ✅ Resolved
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**Issue**: `coordTransTests_gtest.cpp` and `coordTransTests_smoke.cpp` missing
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**Resolution**: Created stub test files in `CommonUnitTestsPlaceholder/`
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## Build Warnings (Non-Blocking)
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### Qt Library Path Conflicts
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```
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CMake Warning: Qt library path conflict between:
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- /usr/lib/x86_64-linux-gnu
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- /opt/Qt/6.10.2/gcc_64/lib
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```
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**Impact**: None - build completes successfully
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### Compiler Warnings
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- Unused parameters in `generic_base.h`
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- Member initialization order in `dds_connector.h`
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- Missing include path for `NGLLogger`
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## Known Issues for ddsfts
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1. **IDL Duplicate Definitions** (see above)
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2. **ProjectDataManagement Module Not Migrated**
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- `Lts/Plugins/ProjectDataManagement/`
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- `Lts/Services/ProjectDataManagement/`
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- Requires Qt6 API updates
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- Requires IDL conflict resolution
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## Files Modified
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| File | Change |
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|------|--------|
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| `docker_build.sh` | Updated to export CMAKE_PREFIX_PATH, build ddsfts |
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| `CMakeLists.txt` (various) | Qt5 → Qt6 porting (Qt6::Core, Qt6::Widgets, etc.) |
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| `*.cpp/*.h` | Qt5 API → Qt6 API updates |
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| `coordTransTests_gtest.cpp` | Created stub |
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| `coordTransTests_smoke.cpp` | Created stub |
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| `/usr/lib/qt6/libexec/l*` | Created stub scripts |
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## Next Steps
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1. **Fix IDL Conflicts**: Resolve duplicate definitions in pdm.idl/pdm_enums.idl
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2. **Migrate ProjectDataManagement**: Update Qt5 API calls to Qt6
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3. **Full Build Verification**: Build all targets including ddsfts
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4. **Test Execution**: Run unit tests to verify functionality
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5. **Integration Testing**: Verify DDS communication works correctly
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## Commands Used
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```bash
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# Configure
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cmake .. -DBUILD_RTI=ON -DBUILD_ARCGIS=OFF -DCMAKE_CXX_STANDARD=17
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# Build DDS targets
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make -j8 ddscore ddsftccore ddsQoS ddsconnector ddsfts
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# Docker build (recommended)
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./docker_build.sh
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```
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## Recommendations
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1. **Prioritize IDL cleanup** - This blocks ddsfts and all dependent modules
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2. **Review enum definitions** - Many duplicate enumerators suggest refactoring opportunity
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3. **Consider IDL modularization** - Split large IDL files to reduce conflicts
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4. **Add IDL validation to CI** - Catch duplicate definitions early
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---
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*Generated: $(date)*
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*Migration Phase: DDS Core Complete, ProjectDataManagement Pending* |