patch 8.1.0360: using an external diff program is slow and inflexible commit https://github.com/vim/vim/commit/e828b7621cf9065a3582be0c4dd1e0e846e335bf Author: Bram Moolenaar <Bram@vim.org> Date: Mon Sep 10 17:51:58 2018 +0200 patch 8.1.0360: using an external diff program is slow and inflexible Problem: Using an external diff program is slow and inflexible. Solution: Include the xdiff library. (Christian Brabandt, closes https://github.com/vim/vim/issues/2732) Use it by default.

#! /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