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)

#! /bin/sh
#
# which.sh -- find where an executable is located.  It's here because the
# "which" command is not supported everywhere.  Used by Makefile.

IFS=":"
for ac_dir in $PATH; do
	if test -f "$ac_dir/$1"; then
		echo "$ac_dir/$1"
		break
	fi
done