===== verbose =====

how to print invocated commands including non echoed ones "@foo" ? 
  make -n
but dont invocated them :
  * http://www.gnu.org/software/make/manual/html_node/Echoing.html#Echoing

Solution :
  remake -d

This helped to hack [[autotools]] [[makefile]]s
  * http://packages.qa.debian.org/r/remake.html


===== ENV =====

If you need only a few known variables exporting in makefile can be an option, here is an example of what I am using.

    $ grep ID /etc/os-release 

    ID=ubuntu
    ID_LIKE=debian


    $ cat Makefile

    default: help rule/setup/lsb
    
    source?=.
    
    help:
            -${MAKE} --version | head -n1
    
    rule/setup/%:
            echo ID=${@F}
    
    rule/setup/lsb: /etc/os-release
            ${source} $< && export ID && ${MAKE} rule/setup/$${ID}


    $ make

    make --version | head -n1
    GNU Make 3.81
    . /etc/os-release && export ID && make rule/setup/${ID}
    make[1]: Entering directory `/tmp'
    echo ID=ubuntu
    ID=ubuntu

   * http://stackoverflow.com/questions/7507810/howto-source-a-script-from-makefile


===== paths =====

[[VPATH]] :
  * http://www.gnu.org/software/autoconf/manual/make/General-Search.html#General-Search

  OBJ_DIRS?=$(shell find . -iname "*.o" | sed -e "s|\(.*\)/.*|\1|g" | sort | uniq | tr '\n' ':')
  VPATH=${OBJ_DIRS}

  show-vpath: ${OBJS}
	    echo "VPATH="
	    echo ${^D} | tr ' ' '\n' | sort | uniq | tr '\n' ':' "
	  

===== regex =====

[[RegEx]] :

  test: ${CURDIR}
	echo ${<:%-1.0.0=%}
	echo ${<:%-1.0.0=%-snapshot}
	echo ${<:%-%=%-snapshot}
	echo ${<:%-1.0.0=%-snapshot}
  install-libs: ${modules_jni}
	echo ${^:TuxGuitar-%=tuxguitar-%} 
	for t in ${^} ; do  \
	 echo install -s  $$t/$${t/TuxGuitar/tuxguitar} \
	 ; done

===== install ======

install-list:
     find . -type f -perm -u+x -exec file '{}' \;


===== ERROR =====

  " *** target pattern contains no `%'.  Stop."

  pwd | grep ':' 

Message :

  # rzr@lap:linux/ # [0] # make
  Makefile:129: *** multiple target patterns.  Stop.


Cause :

  # rzr@lap:linux/ # [0] # pwd  
  /home/rzr/var/cache/url/git/ssh/git@github.com:/rzr/linux/src/linux

Solution :

  # rzr@lap:ssh/ # [0] # mv git\@github.com\: git\@github.com/


===== LINKS =====

  * http://blog.jgc.org/2015/03/gnu-make-insanity-finding-value-of-j.html# SmP
  * http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/introduction-to-redo.html# IncrementaL
  * http://www.olioapps.com/blog/the-lost-art-of-the-makefile/# JavaScript
  * https://gist.github.com/rueycheng/42e355d1480fd7a33ee81c866c7fdf78
  * https://news.ycombinator.com/item?id=40333481# TasK


===== MORE =====

@TaG: MakE ProgrammingTool TooL GnU MakE BuilD