WasmVM: WASI sysroot locale/monetary formatting (strfmon) not functional

[NathanFlurry]

Summary

strfmon() and strfmon_l() do not produce correct output in the WASI sysroot. The WASI libc (musl-based) has limited locale support, and monetary formatting functions may not be properly implemented.

Affected os-test cases

• basic/monetary/strfmon
• basic/monetary/strfmon_l

Expected behavior

Monetary formatting functions should produce POSIX-compliant formatted output.

Context

Discovered via os-test POSIX conformance suite. Tracked in posix-exclusions.json as fail / patched-sysroot.

[NathanFlurry]

Fixed in 83914517 — strfmon_override.c implements POSIX locale strfmon correctly (empty mon_decimal_point, CHAR_MAX sign position).