usr/lib/*/libsystemd-journal.so
usr/lib/*/pkgconfig/libsystemd-journal.pc
usr/include/systemd/sd-journal.h
usr/include/systemd/sd-messages.h
usr/share/man/man3/sd_journal*
usr/share/man/man3/sd-journal*
usr/share/man/man3/SD_JOURNAL*