[Bug cli/15190] New: programs run inside gdb ignore LD_LIBRARY_PATH

[Bug cli/15190] New: programs run inside gdb ignore LD_LIBRARY_PATH

[lvernschrock at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15190

             Bug #: 15190
           Summary: programs run inside gdb ignore LD_LIBRARY_PATH
           Product: gdb
           Version: 7.2
            Status: NEW
          Severity: normal
          Priority: P2
         Component: cli
        AssignedTo: unassigned@sourceware.org
        ReportedBy: lvernschrock@gmail.com
    Classification: Unclassified


This looks very similar to bug # 9011. I think that the easiest way to discuss
this is to simply paste my shell output in the bug report:
[quote]
tc@box:~$ cat > awsome.h << EOF
> void printmessage();
> EOF
tc@box:~$ cat > awsome.c << EOF
> #include "awsome.h"
> #include <stdio.h>
>
> void printmessage(){
>     printf("your computer is awsome\n");
> }
> EOF
tc@box:~$ mkdir mylib
tc@box:~$ gcc -fPIC -c awsome.c -o awsome.o
tc@box:~$ gcc -shared awsome.o -o mylib/libawsome.so
tc@box:~$ cat > demo.c << EOF
> #include "awsome.h"
>
> int main(int argv){
>     printmessage();
>     return 0;
> }
> EOF
tc@box:~$ gcc -c demo.c -o demo.o
tc@box:~$ gcc demo.o -Lmylib -lawsome -o demo
tc@box:~$ ./demo
./demo: error while loading shared libraries: libawsome.so: cannot open shared
object file: No such file or directory
tc@box:~$ export LD_LIBRARY_PATH=~/mylib
tc@box:~$ ./demo
your computer is awsome
tc@box:~$ gdb demo
GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/tc/demo...(no debugging symbols found)...done.
(gdb) run
Starting program: /home/tc/demo
/home/tc/demo: error while loading shared libraries: libawsome.so: cannot open
shared object file: No such file or directory

Program exited with code 0177.
(gdb) show env LD_LIBRARY_PATH
LD_LIBRARY_PATH = /home/tc/mylib
(gdb) quit
[/quote]
What really bothers me is the output from "show env LD_LIBRARY_PATH".
It seems that gdb sees the environmental variable; why can't the program inside
see it? 
I'm running on a Linux-based O.S.; kernel version 3.0.21.

P.S. I don't actually want to debug this demo program. I'm trying to debug a
more complex program and I wrote this trivial example to illustrate the issue
I'm running into.

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[Bug cli/15190] programs run inside gdb ignore LD_LIBRARY_PATH

[jan.kratochvil at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15190

Jan Kratochvil <jan.kratochvil at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING
                 CC|                            |jan.kratochvil at redhat
                   |                            |dot com

--- Comment #1 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2013-02-26 15:39:10 UTC ---
Not reproducible for me (Fedora 17 x86_64):

$ echo $LD_LIBRARY_PATH
/home/jkratoch/t/mylib
$ /tmp/gdb-7.2/gdb/gdb demo
GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/jkratoch/t/demo...(no debugging symbols
found)...done.
(gdb) show env LD_LIBRARY_PATH
LD_LIBRARY_PATH = /home/jkratoch/t/mylib
(gdb) run
Starting program: /home/jkratoch/t/demo 
your computer is awsome

Program exited normally.
(gdb) q

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[Bug cli/15190] programs run inside gdb ignore LD_LIBRARY_PATH

[palves at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15190

Pedro Alves <palves at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |palves at redhat dot com

--- Comment #2 from Pedro Alves <palves at redhat dot com> 2013-02-26 20:18:22 UTC ---
Could it be something in your shell's config clearing the environment?

GDB runs the program like "exec $SHELL -c program".

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[Bug cli/15190] programs run inside gdb ignore LD_LIBRARY_PATH

[lvernschrock at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15190

lvernschrock at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #3 from lvernschrock at gmail dot com 2013-02-27 15:01:26 UTC ---
Okay, it is defiantly a problem with my shell configuration.

[quote]
tc@box:~$ export LD_LIBRARY_PATH=/home/tc/mylib
tc@box:~$ echo $LD_LIBRARY_PATH
/home/tc/mylib
tc@box:~$ $SHELL
tc@box:~$  echo $LD_LIBRARY_PATH

tc@box:~$ exit
tc@box:~$  echo $LD_LIBRARY_PATH
/home/tc/mylib
[/quote]

Thus I assume that this is an invalid bug. I'll mark it as a duplicate of bug#
9011.

*** This bug has been marked as a duplicate of bug 9011 ***

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