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feat: implement target configuration system for issue #1176

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Add comprehensive target configuration parsing and inheritance system:

- Create internal/targets package with config structures
- Support JSON configuration loading with inheritance resolution
- Implement multi-level inheritance (e.g., rp2040 → cortex-m0plus → cortex-m)
- Add 206 target configurations from TinyGo for embedded platforms
- Support core fields: name, llvm-target, cpu, features, build-tags, goos, goarch, cflags, ldflags
- Provide high-level resolver interface for target lookup
- Include comprehensive unit tests with 100% target parsing coverage

This foundation enables future -target parameter support for cross-compilation
to diverse embedded platforms beyond current GOOS/GOARCH limitations.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Li Jie
2025-07-26 10:49:35 +10:00
parent 5eb833a984
commit b80a54eb0f
277 changed files with 8202 additions and 0 deletions
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10
targets/rp2350_embedded_block.s Normal file
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@@ -0,0 +1,10 @@
// Minimum viable block image from datasheet section 5.9.5.1, "Minimum Arm IMAGE_DEF"
.section .after_isr_vector, "a"
.p2align 2
embedded_block:
.word 0xffffded3
.word 0x10210142
.word 0x000001ff
.word 0x00000000
.word 0xab123579
embedded_block_end: