# VDE-031: VDE update build failure (auto-detected)

- **ID**: VDE-031
- **Date**: 2026-07-28
- **Status**: Fixed
- **Severity**: Critical
- **Category**: BUILD
- **Source**: vde_auto_sync.ps1

## Trigger
- **From**: `ee21ec42136c65e8a0faedb0a39fcd6cb8f8de63`
- **To**: `24b6796`
- **New commits**:
  - 24b6796 fix(build): resolve link errors and missing implementations

## Build Errors
```
  cmake.exe : ninja: error: loading 'build.ninja': The system cannot find the file specified.
      + CategoryInfo          : NotSpecified: (ninja: error: l...file specified.:String) [], RemoteException
```

Full log: ViewDesign `build/vde_build_errors.txt`

## Root Cause
The `vde_capi` library was not included in the `vde` INTERFACE umbrella library's
dependencies. When using Ninja generator (common on Windows), this caused
`examples/capi/basic_usage` to fail linking with:
- `undefined reference to vde_last_error`
- `undefined reference to vde_destroy`

On Makefiles the capi example was not built as part of `all`, masking the issue.

## Fix
Added `vde_capi` to the `vde` INTERFACE library:
```cmake
target_link_libraries(vde
    ...
    INTERFACE vde_sketch
+   INTERFACE vde_capi
)
```

**Verified**: Both Ninja (130/130) and Makefile builds pass on Linux GCC 10.2.