Zig's ubsan runtime cannot be bundled on Windows (LNK4229),
leaving __ubsan_handle_* symbols unresolved when the static
archive is consumed by an external linker like MSVC link.exe.
freetype, glslang, spirv-cross, and highway already suppress
ubsan unconditionally. Add MSVC-conditional suppression to the
seven C dependencies that were missing it: harfbuzz, libpng,
dcimgui, wuffs, oniguruma, zlib, and stb.
The fix is gated on abi == .msvc so ubsan coverage is preserved
on Linux and macOS where bundle_ubsan_rt works.
Zig unconditionally passes -nostdinc++ and adds its bundled
libc++/libc++abi include paths, which conflict with MSVC's own C++
runtime headers. The MSVC SDK directories (added via linkLibC)
already contain both C and C++ headers, so linkLibCpp is not needed.
This is the same fix already applied upstream to highway, simdutf,
utfcpp, glslang, SharedDeps, and GhosttyZig.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
