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[bug #31278] multiple shell commands within one rule invoke separate she


From: anonymous
Subject: [bug #31278] multiple shell commands within one rule invoke separate shell environments
Date: Fri, 08 Oct 2010 17:49:11 +0000
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.4) Gecko/20100624 Red Hat/3.6-8.el5 Firefox/3.6.4 GTB7.1

URL:
  <http://savannah.gnu.org/bugs/?31278>

                 Summary: multiple shell commands within one rule invoke
separate shell environments
                 Project: make
            Submitted by: None
            Submitted on: Fri 08 Oct 2010 05:49:10 PM UTC
                Severity: 3 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.81
        Operating System: None
           Fixed Release: None
           Triage Status: None

    _______________________________________________________

Details:

Hi,

It would be really nice if make somehow used the same instance of a shell in
the commands for a given rule, for example:

SHELL = /bin/bash

f :
        a=5
        @echo $${a}

does not do what one wants.  instead you must say:

f :
        @a=5; echo $${a}


It isn't a bug, since there is no claim that make retains a shell
environment.

I don't think it would be desirable to retain the shell environment across
rules, but within a rule, i think it makes sense.








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