luoliwoshang dac3365c73 cl,build: support //export with different names on embedded targets ...

Add support for using different C symbol names in //export directives
when compiling for embedded targets (enabled via -target flag).

This is for TinyGo compatibility on embedded platforms where hardware
interrupt handlers often require specific naming conventions.

Implementation:
- Add EnableExportRename() to control export rename behavior
- Add isExport parameter to initLink callback for context awareness
- Update initLinknameByDoc() to handle export rename logic:
  * When isExport && enableExportRename: allow different names
  * Otherwise: require name match
- Clean error handling in initLink():
  * export + enableExportRename: silent return (already processed)
  * export + !enableExportRename: panic with clear error message
  * other cases: warning for missing linkname

Example:
  //export LPSPI2_IRQHandler
  func interruptLPSPI2() { ... }

The Go function is named interruptLPSPI2 but exported as
LPSPI2_IRQHandler for the hardware vector table.

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

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-10 18:52:36 +08:00

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