After `pkg_check_modules(PC_GCRYPT QUIET libgcrypt)` in FindLibGcrypt.cmake, PC_GCRYPT_FOUND will be set but PC_GCRYPT is kept empty. So PC_GCRYPT_FOUND should be checked instead.
Committed 262568@main (2bbc81a78b68): <https://commits.webkit.org/262568@main> Reviewed commits have been landed. Closing PR #12360 and removing active labels.