If your ports requires pkg-config, just set USE_PKGCONFIG to the following possible values:
Table 6-4. Values for USE_PKGCONFIG
| Definition | Description |
|---|---|
| USE_PKGCONFIG= yes | The ports uses pkg-config only at build time |
| USE_PKGCONFIG= build | The ports uses pkg-config only at build time |
| USE_PKGCONFIG= run | The ports uses pkg-config only at run time |
| USE_PKGCONFIG= both | The ports uses pkg-config both at build and run time |