Gentoo's Bugzilla –
Attachment 580142 Details for
Bug 688326dev-db/mariadb-connector-c - In file included from .../work/mariadb-connector-c-3.0.6-src/plugins/auth/mariadb_cleartext.c:21: /usr/local/include/curl/curlrules.h:142:3: error: size of array ‘__curl_rule_01__’ is negative