[xushiwei]

No description provided.

[fennoai]

Review: llgo:type C => llgo:cdecl

Mechanical rename of the llgo directive //llgo:type C (and the inconsistently-spaced // llgo:type C) to //llgo:cdecl across the C/C++/Python FFI bindings, plus removal of the standalone test programs under c/bdwgc/_test/.

Verified:

• Rename is complete and consistent — no llgo:type occurrences remain anywhere in the repo; all 64 new //llgo:cdecl directives use the correct no-space Go directive form.
• Each directive sits immediately above its declaration with no intervening blank line. c/libuv/async.go correctly inserts a bare // separator so the directive attaches to type AsyncCb — this also activates a directive that was previously inert due to the leading space.
• Several prior // llgo:type C lines carried a space and so were not valid Go directives; normalizing them to //llgo:cdecl is a genuine correctness improvement, not just cosmetic.
• Deleting c/bdwgc/_test/ leaves no dangling references; c/bdwgc/bdwgc.go is self-contained.
• gofmt is clean on the changed files.

No correctness, performance, or security issues found. The actual ABI/calling-convention behavior depends on the llgo compiler mapping //llgo:cdecl to the former //llgo:type C semantics, which lives in the compiler and is out of scope for this diff.

Optional, out of scope: the repo still uses the spaced // llgo:link ... form in many places; a follow-up could normalize those to the no-space directive form for consistency.

[fennoai]

Minor / informational: these two directives (this line and line 34) are inside the /* ... */ block comment that spans lines 28-39, so the llgo compiler never sees them — the rename has no functional effect here (same as the old // llgo:type C). Harmless, but worth knowing it's a documentation-only touch-up, not an active directive, until the block is uncommented.