[bug #35062] Add lazy evaluation of prerequisites

[Lukasz Mielicki]

URL:
  <http://savannah.gnu.org/bugs/?35062>

                 Summary: Add lazy evaluation of prerequisites
                 Project: make
            Submitted by: lmielick
            Submitted on: Wed 14 Dec 2011 01:16:59 AM GMT
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: None
        Operating System: Any
           Fixed Release: None
           Triage Status: None

    _______________________________________________________

Details:

The idea is not to evaluate prerequisites of target not being make goals. Such
approach would improve non-recursive make performance by skipping unnecessary
wildcard/shell calls for targets not being build.

E.g. the following Makefile would output only:
A prerequisites evaluated

all: a
a: $(info A prerequisites evaluated)
b: $(info B prerequisites evaluated)
.PHONY: a b all

This could be handled in a way similar to .SECONDEXPANSION not to cause
compatibility issues in cases where prerequisites expansions  causes side
effects. However greater care may be needed to support eval.





    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?35062>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/