[Octave-bug-tracker] [bug #38575] crash on lapack error if libraries built with -Bsymbolic

[Mike Miller]

URL:
  <http://savannah.gnu.org/bugs/?38575>

                 Summary: crash on lapack error if libraries built with
-Bsymbolic
                 Project: GNU Octave
            Submitted by: mtmiller
            Submitted on: Fri 22 Mar 2013 07:56:24 PM EDT
                Category: Configuration and Build System
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

Octave crashes, or rather exits from within the BLAS or LAPACK libraries, when
those libraries are linked with the -Bsymbolic or -Bsymbolic-functions linker
options. The entire Ubuntu distribution is built by default with
-Bsymbolic-functions, for example.

The problem is that Octave expects to be able to override the XERBLA error
handler function by defining its own copy and linking it first so it takes
precedence over BLAS and LAPACK's own copies. This has no effect when the
LAPACK shared library is linked using -Bsymbolic-functions.

The attached program (modified from a snippet posted by jwe in a different bug
report) shows the difference between Debian and Ubuntu, both with LAPACK
version 3.4.2:


address@hidden:~$ gfortran -o xerbla-test xerbla-test.f -lblas -llapack
address@hidden:~$ ./xerbla-test 
 In do-nothing xerbla
          -4
                       NaN   0.0000000000000000     
                       NaN

address@hidden:~$ gfortran -o xerbla-test xerbla-test.f -lblas -llapack
address@hidden:~$ ./xerbla-test 
 ** On entry to DLASCL parameter number  4 had an illegal value




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File Attachments:


-------------------------------------------------------
Date: Fri 22 Mar 2013 07:56:24 PM EDT  Name: xerbla-test.f  Size: 789B   By:
mtmiller

<http://savannah.gnu.org/bugs/download.php?file_id=27663>

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