2026-10-26 23:03:17 +01:00
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# Build baseline
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2026-10-26 23:07:03 +01:00
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Phase 0 retains the existing layout: public C headers in `include/xtc`,
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2026-10-26 23:03:17 +01:00
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C implementation modules under `src`, optional C++ GUI under `src/gui`, and
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tests under `tests`. `src/main.c` is a minimal headless startup/shutdown check;
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it does not initialize audio devices or open a GUI.
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## Commands
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```sh
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make clean all test
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./build/xtc-check
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make debug
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make gui
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```
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`all` builds the static C library and startup check. `test` runs the existing
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core and offline graph tests plus the startup check. `debug` builds and tests separately in
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`build/debug`. `gui` builds the existing placeholder shell; it does not produce
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audio. Generated files remain under `build` and header changes trigger rebuilds.
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Compiler, flags, `BUILD_DIR`, `PKG_CONFIG`, `FLTK_CONFIG`, and installation
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`PREFIX` can be overridden through Make variables. C uses C99; GUI uses C++17.
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## Inspected Linux toolchain (2026-10-26)
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| Component | Available version | Role |
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| --- | --- | --- |
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| GCC / G++ | 16.2.1 | C core and optional C++ GUI |
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| GNU Make | 4.4.1 | Build and test driver |
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| pkg-config | 3.0.10 | Development package discovery |
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| FLTK | 1.4.5 | Optional GUI; discovered through `fltk-config` |
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| JACK | 3.1609.0 (pkg-config) | Candidate backend; not linked yet |
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| ALSA | 1.2.16.1 (pkg-config) | Future MIDI candidate; not linked yet |
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| Clang | 23.1.3 | Alternative compiler / diagnostics |
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Valgrind is also available. The core tests use a small in-tree C test harness
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and require no external test framework. FLTK has no `fltk.pc` on this host;
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the Makefile tries pkg-config first, then `fltk-config`.
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## Dependencies and licensing
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No new dependencies are introduced. The core needs the C runtime and math
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library. The repository is MIT licensed. The optional GUI uses maintained
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FLTK 1.4 (LGPL with FLTK's static-linking exception); its platform link flags
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come from the installed package. Distribution still requires review of all
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linked dependencies and notices. JACK and ALSA remain candidates only; backend
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selection and license review belong to Phase 2. No packages or system settings
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are changed by these build commands.
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## Next milestone
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2026-10-26 23:20:00 +01:00
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Phase 1 implements compiled offline plans, preallocated buffers, oscillator,
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gain, meter/output nodes and routing tests; see AUDIO_ENGINE.md. Phase 2 adds
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a hardware backend and safe cross-thread plan publication/retirement. Public
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project persistence declarations remain unimplemented. Hardware playback and
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interactive GUI behavior are not verified by the offline tests.
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