commit https://github.com/vim/vim/commit/31f19ce0a052f7c76d44a9a190e468c79cf5d56d Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 8 14:14:43 2017 +0100 patch 8.0.0154: system() test fails on OS/X Problem: system() test fails on OS/X. Solution: Deal with leading spaces.

#! /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