FreeBSDでsqlite3のgemをインストールするには、以下のようにsqlite3のヘッダファイルの位置などを補ってやる必要が従来からあった。 gem install sqlite3 -- --with-sqlite3-lib=/usr/local/lib --with-sqlite3-include=/usr/local/include sqlite3.c:35:20: warning: implicit declaration of function 'RBIGNUM' is invalid in C99 [-Wimplicit-function-declaration] const long len = RBIGNUM_LEN(value); ^ sqlite3.c:33:27: note: expanded from macro 'RBIGNUM_LEN' # define
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