makefile head-scratcher: multiple targets in one go Post: 302494723

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Top Forums UNIX for Advanced & Expert Users makefile head-scratcher: multiple targets in one go Post 302494723 by treczoks on Tuesday 8th of February 2011 07:36:23 AM

02-08-2011

Registered User

Quote:

Originally Posted by drl

My understanding is that you want to run a command if any of the targets are out of date, but only once, not once for each target.

Yep, entirely correct.

Indeed, an interesting idea to touch the config file and turn the dependencies around.

BUT:
a) It will only work when updating an existing set of files, not with creating them initially ("No rule to make target 'a.txt' needed by 'abcd.conf'")
b) It will not produce correct results in my case, as the same config file is used by several different scripts to generate targets (sometimes only one, sometimes 256 in one go)

I found a solution. Not nice, but I have to generate the makefile anyway...

Code:

# "myscript conf.dat" creates/updates a.txt, b.txt c.txt, and d.txt
all : a.txt b.txt c.txt d.txt
a.txt : conf.dat
  myscript conf.dat

b.txt : conf.dat
  myscript conf.dat

c.txt : conf.dat
  myscript conf.dat

d.txt : conf.dat
  myscript conf.dat

Looks like GNU make re-evaluates all targets after each run of a rule. Lets see how it copes with all ~8500 rules of the project... Smilie

treczoks

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finger.conf

FINGER.CONF(5)						      BSD File Formats Manual						    FINGER.CONF(5)

NAME

     finger.conf -- finger(1) alias configuration file

DESCRIPTION

     The optional finger.conf file is used to provide aliases that can be fingered by local and network users.	This may be useful where a user's
     login name is not the same as their preferred mail address, or for providing virtual login names than can be fingered.

     Lines beginning with ``#'' are comments.  Other lines must consist of an alias name and a target name separated by a colon.  A target name
     should be either a user, a forward reference to another alias or the path of a world readable file.

     Where an alias points to a file, the contents of that file will be displayed when the alias is fingered.

FILES

     /etc/finger.conf  finger(1) alias definition data base

EXAMPLES

     # /etc/finger.conf alias definition file
     #
     # Format alias:(user|alias)
     #
     # Individual aliases
     #
     markk:mkn
     john.smith:dev329
     john:dev329
     sue:/etc/finger/sue.txt
     #
     # Network status message
     #
     status:/usr/local/etc/status.txt
     #
     # Administrative redirects
     #
     root:admin
     postmaster:admin
     abuse:admin
     #
     # For the time being, 'sod' is sysadmin.
     #
     admin:sod

SEE ALSO

     finger(1)

HISTORY

     Support for the finger.conf file was submitted by Mark Knight <markk@knigma.org> and first appeared in FreeBSD 4.2.

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								  August 16, 2000							       BSD