Re: [Boost-bugs] [Boost C++ Libraries] #1018: Boost.Python library that is linked to OpenGL results in segfault upon output to std::cerr

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #1018: Boost.Python library that is linked to OpenGL results in segfault upon output to std::cerr
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-05-31 17:24:14

#1018: Boost.Python library that is linked to OpenGL results in segfault upon
output to std::cerr
-------------------------------+--------------------------------------------
  Reporter:  alanic_at_[hidden]  |       Owner:  dave              
      Type:  Bugs              |      Status:  closed            
 Milestone:                    |   Component:  Python            
   Version:  release 1.34.0    |    Severity:  Showstopper       
Resolution:  invalid           |    Keywords:  python cerr OpenGL
-------------------------------+--------------------------------------------
Changes (by dave):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 I tested this and couldn't reproduce it.  I was unable to make the link
 line as shown succeed (I got:

 {{{
 /usr/bin/ld: cannot find -lGL
 collect2: ld returned 1 exit status
 }}}
 ), so I used this:

 "g++" -o "/tmp/bb/boost-python-quickstart/gcc-4.1.2/debug/extending.so"
 -Wl,-h -Wl,extending.so -shared -Wl,--start-group "/tmp/bb/boost-python-
 quickstart/gcc-4.1.2/debug/extending.o"
 "/tmp/bb/boost/bin.v2/libs/python/build/gcc-4.1.2/debug/libboost_python-
 gcc41-d-1_34_1.so.1.34.1" /usr/lib/libGL.so.1  -lutil -lpthread -ldl -Wl,
 --end-group -g

 which worked (obviously I still don't understand linking well enough).
 The test ran as follows:

 {{{
 python "test_extending.py"
 cerr
 cerr
 cerr
 cerr
 cerr
 Trying:
     from extending import *
 Expecting nothing
 ok
 Trying:
     hi = hello('California')
 Expecting nothing
 ok
 Trying:
     hi.greet()
 Expecting:
     'Hello from California'
 cout0 0 0 0
 ok
 Trying:
     invite(hi)
 Expecting:
     'Hello from California! Please come soon!'
 cout0 0 0 0
 ok
 Trying:
     hi.invite()
 Expecting:
     'Hello from California! Please come soon!'
 cout0 0 0 0
 ok
 Trying:
     class wordy(hello):
         def greet(self):
             return hello.greet(self) + ', where the weather is fine'
 Expecting nothing
 ok
 Trying:
     hi2 = wordy('Florida')
 Expecting nothing
 ok
 Trying:
     hi2.greet()
 Expecting:
     'Hello from Florida, where the weather is fine'
 cout0 0 0 0
 ok
 Trying:
     invite(hi2)
 Expecting:
     'Hello from Florida! Please come soon!'
 cout0 0 0 0
 ok
 1 items had no tests:
     test_extending.run
 1 items passed all tests:
    9 tests in test_extending
 9 tests in 2 items.
 9 passed and 0 failed.
 Test passed.

 EXIT STATUS: 0
 }}}

 If someone can tell me what packages to install on ubuntu in order to
 reproduce this, I'll be happy to take a look (though I can't imagine what
 relationship we might have to OpenGL).  I seem to have /usr/lib/libGL.so.1
 symlinked to /usr/lib/libGL.so.1.2 already on the system.  Until then I'm
 closing the ticket as nonreproducible.  Please feel free to reopen.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1018#comment:2>
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