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Bug 227454 - Nonexistent $lt_unset used
Summary: Nonexistent $lt_unset used
Alias: None
Product: Fedora
Classification: Fedora
Component: libtool
Version: 6
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Karsten Hopp
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2007-02-06 00:02 UTC by David Nečas
Modified: 2007-11-30 22:11 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-02-08 14:24:43 UTC

Attachments (Terms of Use)

Description David Nečas 2007-02-06 00:02:15 UTC
Description of problem:
libtool execute mode uses $lt_unset to unset locale environment variables.  It
is probably supposed to be defined to a command such as `unset', but it is never

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. echo 'int main(void) { return 0; }' >z.c
2. libtool --mode=compile --tag=CC gcc -c -o z.o z.c
3. libtool --mode=link --tag=CC gcc -o z z.o
4. libtool --mode=execute ./z

Actual results:
1. (nothing)
  gcc -c z.c  -fPIC -DPIC -o .libs/z.o
  gcc -c z.c -o z.o >/dev/null 2>&1
  gcc -o z z.o    
  /usr/bin/libtool: line 6823: LANG: command not found
  /usr/bin/libtool: line 6823: LC_ALL: command not found
  /usr/bin/libtool: line 6823: LC_COLLATE: command not found
  /usr/bin/libtool: line 6823: LC_MESSAGES: command not found

Expected results:
1-3. Same as above.
4. (nothing)

Additional info:
a. The set of variables printed in 4. is the set of unset locale environment
variables.  It may differ depending on your locale setup.  libtool returns the
set ones to previous values, therefore lt_unset is only involved for unset

b. The same problem of course occurs also with libtools generated for software
packages libtoolized with Fedora's libtool, not only when /usr/bin/libtool is used.

Comment 1 David Nečas 2007-02-07 20:50:20 UTC
Upstream libtool does not exhibit this problem.  The problem is RedHat/Fedora
specific and caused by patch libtool-1.5.22-misc.patch.

The variable lt_unset was introduced on 2006-05-18 to the HEAD (libtool-2.x)
branch of libtool, it does NOT exist in the 1.5 branch.

Comment 2 Karsten Hopp 2007-02-08 14:24:43 UTC
that's not quite right, it does exist in the 1.5 branch, 
although not in 1.5.22:

[libtool] >grep -r lt_unset .
./            $lt_unset $lt_var
hagen:[libtool] >cvs status
File:         Status: Up-to-date

   Working revision:    1.334.2.138
   Repository revision: 1.334.2.138     /sources/libtool/libtool/Attic/,v
   Sticky Tag:          branch-1-5 (branch: 1.334.2)
   Sticky Date:         (none)
   Sticky Options:      (none)

Anyway, this will be fixed in the next libtool package, 

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