key logs # environment rvm_path = /usr/local/rvm # makefile (from 'Makefile.config', line 111) LLVM_ON_UNIX := 1 # makefile (from 'Makefile.config', line 59) PROJ_SRC_DIR := /home/lab/rust/src/llvm/home/lab/rust/x86_64-apple-darwin/llvm it's said caused by "built-in implementation of realpath in Make" http://stackoverflow.com/questions/4763381/no-rule-to-make-target-makefile-needed-by-makefile make version is "GNU Make 4.1" how can i switch to macro version realpath instead of make version?