commit https://github.com/vim/vim/commit/06b0734d9cd2f39d4c12c7fd89a100eadbe5be78 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 31 22:26:28 2015 +0100 patch 7.4.1014 Problem: fnamemodify('.', ':.') returns an empty string in Cygwin. Solution: Use CCP_RELATIVE in the call to cygwin_conv_path. (Jacob Niehus, closes https://github.com/vim/vim/issues/505)

/* auto/if_perl.c */
int perl_enabled __ARGS((int verbose));
void perl_end __ARGS((void));
void msg_split __ARGS((char_u *s, int attr));
void perl_win_free __ARGS((win_T *wp));
void perl_buf_free __ARGS((buf_T *bp));
void ex_perl __ARGS((exarg_T *eap));
void ex_perldo __ARGS((exarg_T *eap));