[Bug libc/804] New: malloc/tst-mtrace linked w/ wrong dynamic-linker directive

[Bug libc/804] New: malloc/tst-mtrace linked w/ wrong dynamic-linker directive

[balducci at units dot it]

Apologies if I'm wrong.

Building glibc with --prefix=/usr/local/glibc for the first time (so
/usr/local/glibc does not yet exist).

Upon `make check', the following error message is issued:
   ...
   /bin/sh -e tst-mtrace.sh
/home/balducci/tmp/install-us-d/glibc-d/glibc-2.3.4/build-d/
   env:
/home/balducci/tmp/install-us-d/glibc-d/glibc-2.3.4/build-d/malloc/tst-mtrace:
No such file or directory
   ...

Browsing the output, it turns out that tst-mtrace is linked with
`-Wl,-dynamic-linker=/usr/local/glibc/lib/ld-linux.so.2', which is the
*final* destination of the dynamic-linker. However, as I'm installing
for the first time with --prefix=/usr/local/glibc,
/usr/local/glibc/lib/ld-linux.so.2 does not yet exist at `make check'
time. The consequence is that tst-mtrace is linked without any complaint
(!), but trying to run it (it is run by the malloc/mtrace perl script)
generates the above listed error message.

The same seems to apply to all other tst-* testers, but for those I
haven't noticed any error message (probably because their output is
redirected into files)

===============
>How-To-Repeat:
===============

     configure ... --prefix=/not/yet/existing/dir ...
     make
     make check

=====
>Fix:
=====

Link tst-mtrace with the path to the dynamic linker in the build tree:
                                                    -----------------

  `-Wl,-dynamic-linker=/build/directory/tree/glibc-2.3.4/build-d/elf/ld-linux.so.2'

My workaround (which is definitely *not* a fix): stuff a specific make
rule for tst-mtrace (with the correct dynamic-linker directive) into
Rules.

I guess that a genuine fix would require diving into the Makefiles,
which I haven't done.

Ciao
Gabriele

-- 
           Summary: malloc/tst-mtrace linked w/ wrong dynamic-linker
                    directive
           Product: glibc
           Version: 2.3.4
            Status: NEW
          Severity: minor
          Priority: P3
         Component: libc
        AssignedTo: gotom at debian dot or dot jp
        ReportedBy: balducci at units dot it
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu


http://sources.redhat.com/bugzilla/show_bug.cgi?id=804

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[Bug libc/804] malloc/tst-mtrace minor problem

[gschafer at zip dot com dot au]

------- Additional Comments From gschafer at zip dot com dot au  2005-05-12 00:24 -------
Yes, confirmed. This is a real bug, albeit a very minor one. But the suggested
fix is not the correct one.

The Glibc testsuite normally runs binaries using:

  elf/ld-linux.so.2 --library-path blah:blah:blah

to overcome the problem of having the dynamic linker hardwired to a name which
may not exist yet. This also explains why most folks won't see the problem
(those specifying a prefix where a dynamic linker already exists).

In this instance, the existing technique won't work because the invocation of
the mtrace perl script (from inside tst-mtrace.sh) runs the `tst-mtrace' binary
directly.

A possible fix is to run the mtrace perl script without using the binary ie:
just use the data file alone. This makes it work for me. But I'm unsure whether
running the (optional) binary will make a difference for what is being tested here.

Anyway, patch to follow.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gschafer at zip dot com dot
                   |                            |au
            Summary|malloc/tst-mtrace linked w/ |malloc/tst-mtrace minor
                   |wrong dynamic-linker        |problem
                   |directive                   |


http://sources.redhat.com/bugzilla/show_bug.cgi?id=804

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[Bug libc/804] malloc/tst-mtrace minor problem

[gschafer at zip dot com dot au]

------- Additional Comments From gschafer at zip dot com dot au  2005-05-12 00:26 -------
Created an attachment (id=485)
 --> (http://sources.redhat.com/bugzilla/attachment.cgi?id=485&action=view)
minor fix for malloc/tst-mtrace.sh


-- 


http://sources.redhat.com/bugzilla/show_bug.cgi?id=804

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[Bug libc/804] malloc/tst-mtrace minor problem

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2005-10-14 23:41 -------
I changed the trunk.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=804

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