https://bugs.openldap.org/show_bug.cgi?id=9672
--- Comment #2 from dpa-openldap@aegee.org dpa-openldap@aegee.org --- When GSSAPI is bundled in libsasl2.a, the amount of need libraries to be added manually increases. Pkg-config provides means to avoid manual adding these libraries.
Besides, WiredTiger is detected with pkg-config, and to some extend also systemd . So I do not see a reason to skip the advantages, offered by pkgconfig, when it comes to cyrus sasl.