PHASE3_BUILD_INFRASTRUCTURE.md

# Phase 3 Build Infrastructure

**Date:** 2026-02-06  
**Status:** ✅ Complete

## Overview

Phase 3 build infrastructure has been created to support testing and compilation of Array and Matrix Operations tests. This infrastructure follows the same pattern as Phase 2 for consistency.

## Build Switch

Phase 3 uses the same build switch as Phase 2:
- **Configure Flag**: `--enable-gpl-replacement`
- **Macro**: `OCTAVE_USE_GPL_REPLACEMENT` (defined when flag is enabled)
- **Purpose**: Enables proprietary implementations and test compilation

### Usage

```bash
./configure --enable-gpl-replacement
make
```

## Compilation Scripts

### 1. `compile_phase3_test.sh`

Compiles a single Phase 3 test file.

**Usage:**
```bash
cd liboctave/array
./compile_phase3_test.sh test-array-base-complete.cc
```

**Features:**
- Compiles with all required libraries (array, util, system)
- Links against libarray, libutil, libsystem
- Includes all necessary header paths
- Generates compilation log: `{test-name}.compile.log`
- Creates executable: `{test-name}`

### 2. `compile_all_phase3_tests.sh`

Compiles all Phase 3 test files systematically.

**Usage:**
```bash
cd liboctave/array
./compile_all_phase3_tests.sh
```

**Features:**
- Finds all `test-*-complete.cc` files
- Compiles each test file
- Runs tests after compilation
- Tracks compilation and test results
- Creates results directory: `phase3_compilation_results_{timestamp}/`
- Generates logs for each test:
  - `{test-name}.log` - Compilation log
  - `{test-name}.output.log` - Test output log

## Test Files

Phase 3 has 4 comprehensive test files:

1. **test-array-base-complete.cc**
   - Array base classes
   - Constructors, indexing, memory management
   - Basic operations (fill, resize, reshape)

2. **test-matrix-operations-complete.cc**
   - Matrix operations
   - Arithmetic operations
   - Matrix multiplication
   - Transpose operations

3. **test-matrix-decompositions-complete.cc**
   - Matrix decompositions
   - Determinant, inverse
   - LU, QR, SVD, Cholesky decompositions

4. **test-array-specializations-complete.cc**
   - Array specializations
   - Type conversions
   - Specialized array types (int, double, complex, etc.)

## Build Structure

```
liboctave/array/
├── compile_phase3_test.sh          # Single test compilation
├── compile_all_phase3_tests.sh    # All tests compilation
├── test-array-base-complete.cc
├── test-matrix-operations-complete.cc
├── test-matrix-decompositions-complete.cc
├── test-array-specializations-complete.cc
└── phase3_compilation_results_*/  # Results directory
    ├── {test-name}.log
    └── {test-name}.output.log
```

## Dependencies

Phase 3 tests require:
- `libarray.a` - Array library (Phase 3)
- `libutil.a` - Utility library (Phase 2)
- `libsystem.a` - System library (Phase 2)
- `libwrappers.a` - Wrapper library
- `libgnu.a` - GNU library
- External libraries: openblas, gfortran, readline, LLVM-20, pthread, m, openmp

## Next Steps

1. ✅ Build infrastructure created
2. ⏳ Compile and test Phase 3 tests
3. ⏳ Verify all tests pass
4. ⏳ Begin implementation of proprietary replacements

## Notes

- Phase 3 tests are compiled standalone (not integrated into module.mk)
- This follows the same pattern as Phase 2 for consistency
- Tests can be run independently for development and debugging
- Build switch ensures tests only compile when GPL replacement is enabled