usr/include/ranlib.h

/*      ranlib.h        4.2     87/04/06        */

#define RANLIBMAG       "__.SYMDEF"

/*
 * Structure of the __.SYMDEF table of contents for an archive.
 * __.SYMDEF begins with a word giving the number of ranlib structures
 * which immediately follow, and then continues with a string
 * table consisting of a word giving the number of bytes of strings
 * which follow and then the strings themselves.
 * The ran_strx fields index the string table whose first byte is numbered 0.
 */
struct  ranlib {
        union {
                off_t   ran_strx;       /* string table index of */
                char    *ran_name;      /* symbol defined by */
        } ran_un;
        off_t   ran_off;                /* library member at this offset */
};