This function does nothing aside from returning FcFalse. It used to scan an entire directory and add all fonts found to _s_e_t. If _f_o_r_c_e was FcTrue, then the directory and all files within it were scanned even if information was present in the per-directory cache file or _c_a_c_h_e. Any subdirectories found were added to _d_i_r_s.
Fontconfig version 2.6.0