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[Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes w
From: |
John W. Eaton |
Subject: |
[Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers |
Date: |
Thu, 12 May 2016 04:57:24 +0000 (UTC) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:44.0) Gecko/20100101 Firefox/44.0 Iceweasel/44.0 |
Follow-up Comment #100, bug #44478 (project octave):
As I understand it, OpenGL functions all work by reading or writing to the
"current context". The current context is just some data structure that can
be accessed through a pointer. There is no guarantee that the context will be
laid out in the same way for all implementations. So I don't think there is
any reason to expect functions from the nvidia library to work with a context
allocated by Mesa. And that assumes that the context is even shared properly
between the implementations. I see no reason to expect that to be true
either.
And yes, the link order matters. You can create a simple example to show
that:
$ cat a.cc
#include <iostream>
void
fcn (void)
{
std::cerr << "a" << std::endl;
}
$ cat b.cc
#include <iostream>
void
fcn (void)
{
std::cerr << "b" << std::endl;
}
$ cat main.cc
extern void fcn (void);
int
main (void)
{
fcn ();
return 0;
}
$ g++ -fPIC -shared -o libba.so a.cc
$ g++ -fPIC -shared -o libbb.so b.cc
$ g++ -fPIC main.cc -L. -la -lb
$ ldd a.out
linux-vdso.so.1 (0x00007ffc53486000)
liba.so => not found
libb.so => not found
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007fe7b195f000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fe7b165a000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007fe7b1444000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe7b109f000)
/lib64/ld-linux-x86-64.so.2 (0x000055a83cb52000)
$ LD_LIBRARY_PATH=. ./a.out
a
$ g++ -fPIC main.cc -L. -lb -la
$ ldd a.out
linux-vdso.so.1 (0x00007ffdec1dc000)
libb.so => not found
liba.so => not found
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f1e07536000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f1e07231000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007f1e0701b000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1e06c76000)
/lib64/ld-linux-x86-64.so.2 (0x0000555b62265000)
$ LD_LIBRARY_PATH=. ./a.out
b
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- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, (continued)
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Rik, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Rik, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/11
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers,
John W. Eaton <=
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/12
- Message not available
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Rik, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, John W. Eaton, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, John W. Eaton, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, John W. Eaton, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, John W. Eaton, 2016/05/12
- [Octave-bug-tracker] [bug #44478] test __osmesa_print__.cc-tst crashes with Nvidia drivers, Dan Sebald, 2016/05/12