I have personally mostly eliminated the use of LD_LIBRARY_PATH from my linux 
cluster
in favour of coding runpath in programs and libraries so that it is never an 
issue (the only 
exception would be openfoam I think).
In the case of gcc, it means changing the specs (as in gcc -dumpspecs) to 
enforce its own 
runpath at compile time. You have to patch gcc sources to achieve this but I 
recommend it. 
The only case where it doesn’t work is when ld is called directly rather than 
through the compiler.

François

> On 14/01/2015, at 06:16, crooksc...@gmail.com wrote:
> 
> Thank you.  I had forgotten to include the gcc "lib64" directory in my 
> LD_LIBRARY_PATH.  I have updated the appropriate module file.  I will see 
> what happens next.
> 
> Cindy
> 
> On Monday, January 12, 2015 at 5:59:51 PM UTC-6, François wrote:
> It looks like something has gone wrong with LD_LIBRARY_PATH & co. This means 
> that libstdc++ found when running sage is from older version of gcc than the 
> one used 
> to compile sage. Here you find libstdc++ from the system (gcc-4.3.4 I 
> presume) rather 
> than whatever you used to compile. 
> I assume you have a build environment that is different from the system one 
> (I have at 
> least 5 on the local power7 cluster). 
> 
> François 
> > On 13/01/2015, at 11:21, crook...@gmail.com wrote: 
> > 
> > Setting the effective group to the same as the group on the build directory 
> > did allow pynac to compile.  I am now stuck on an error in 
> > conway_polynomials-0.4.p0. 
> > 
> > ImportError: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found 
> > (required by 
> > /hpc/tstapps/src/sage/sage-6.4.1/local/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_float.so)
> >  
> > 
> > I have not had a chance to investigate, yet.  It may be a couple of days 
> > before I can get back to this. 
> > 
> > Cindy 
> > 
> > 
> > On Thursday, January 8, 2015 at 1:43:22 PM UTC-6, crook...@gmail.com wrote: 
> > I am trying to compile sage-6.4.1 for one of my users.  I am working on a 
> > SLES11 SP2 machine using gcc 4.9.2 and python 2.7.7.  I am using my 
> > personal account and I own the build directory and all of the 
> > directories/files for gcc and python.  I am still getting the following 
> > error: 
> > 
> > checking for a version of Python >= '2.1.0'... sys:1: RuntimeWarning: not 
> > adding 
> >  directory '' to sys.path since it's writable by an untrusted group. 
> > Untrusted users could put files in this directory which might then be 
> > imported b 
> > y your Python code. As a general precaution from similar exploits, you 
> > should no 
> > t execute Python code from this directory 
> > 
> > I have attached the sage_pynac-0.3.2.log for you to review.  I have tried 
> > looking through previous posts, but I don't see anything that quite matches 
> > this situation. 
> > 
> > Thanks in advance for your help. 
> > 
> > Cindy 
> > 
> > On Thursday, January 8, 2015 at 1:43:22 PM UTC-6, crook...@gmail.com wrote: 
> > I am trying to compile sage-6.4.1 for one of my users.  I am working on a 
> > SLES11 SP2 machine using gcc 4.9.2 and python 2.7.7.  I am using my 
> > personal account and I own the build directory and all of the 
> > directories/files for gcc and python.  I am still getting the following 
> > error: 
> > 
> > checking for a version of Python >= '2.1.0'... sys:1: RuntimeWarning: not 
> > adding 
> >  directory '' to sys.path since it's writable by an untrusted group. 
> > Untrusted users could put files in this directory which might then be 
> > imported b 
> > y your Python code. As a general precaution from similar exploits, you 
> > should no 
> > t execute Python code from this directory 
> > 
> > I have attached the sage_pynac-0.3.2.log for you to review.  I have tried 
> > looking through previous posts, but I don't see anything that quite matches 
> > this situation. 
> > 
> > Thanks in advance for your help. 
> > 
> > Cindy 
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups 
> > "sage-devel" group. 
> > To unsubscribe from this group and stop receiving emails from it, send an 
> > email to sage-devel+...@googlegroups.com. 
> > To post to this group, send email to sage-...@googlegroups.com. 
> > Visit this group at http://groups.google.com/group/sage-devel. 
> > For more options, visit https://groups.google.com/d/optout. 
> 
> 
> On Monday, January 12, 2015 at 5:59:51 PM UTC-6, François wrote:
> It looks like something has gone wrong with LD_LIBRARY_PATH & co. This means 
> that libstdc++ found when running sage is from older version of gcc than the 
> one used 
> to compile sage. Here you find libstdc++ from the system (gcc-4.3.4 I 
> presume) rather 
> than whatever you used to compile. 
> I assume you have a build environment that is different from the system one 
> (I have at 
> least 5 on the local power7 cluster). 
> 
> François 
> > On 13/01/2015, at 11:21, crook...@gmail.com wrote: 
> > 
> > Setting the effective group to the same as the group on the build directory 
> > did allow pynac to compile.  I am now stuck on an error in 
> > conway_polynomials-0.4.p0. 
> > 
> > ImportError: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found 
> > (required by 
> > /hpc/tstapps/src/sage/sage-6.4.1/local/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_float.so)
> >  
> > 
> > I have not had a chance to investigate, yet.  It may be a couple of days 
> > before I can get back to this. 
> > 
> > Cindy 
> > 
> > 
> > On Thursday, January 8, 2015 at 1:43:22 PM UTC-6, crook...@gmail.com wrote: 
> > I am trying to compile sage-6.4.1 for one of my users.  I am working on a 
> > SLES11 SP2 machine using gcc 4.9.2 and python 2.7.7.  I am using my 
> > personal account and I own the build directory and all of the 
> > directories/files for gcc and python.  I am still getting the following 
> > error: 
> > 
> > checking for a version of Python >= '2.1.0'... sys:1: RuntimeWarning: not 
> > adding 
> >  directory '' to sys.path since it's writable by an untrusted group. 
> > Untrusted users could put files in this directory which might then be 
> > imported b 
> > y your Python code. As a general precaution from similar exploits, you 
> > should no 
> > t execute Python code from this directory 
> > 
> > I have attached the sage_pynac-0.3.2.log for you to review.  I have tried 
> > looking through previous posts, but I don't see anything that quite matches 
> > this situation. 
> > 
> > Thanks in advance for your help. 
> > 
> > Cindy 
> > 
> > On Thursday, January 8, 2015 at 1:43:22 PM UTC-6, crook...@gmail.com wrote: 
> > I am trying to compile sage-6.4.1 for one of my users.  I am working on a 
> > SLES11 SP2 machine using gcc 4.9.2 and python 2.7.7.  I am using my 
> > personal account and I own the build directory and all of the 
> > directories/files for gcc and python.  I am still getting the following 
> > error: 
> > 
> > checking for a version of Python >= '2.1.0'... sys:1: RuntimeWarning: not 
> > adding 
> >  directory '' to sys.path since it's writable by an untrusted group. 
> > Untrusted users could put files in this directory which might then be 
> > imported b 
> > y your Python code. As a general precaution from similar exploits, you 
> > should no 
> > t execute Python code from this directory 
> > 
> > I have attached the sage_pynac-0.3.2.log for you to review.  I have tried 
> > looking through previous posts, but I don't see anything that quite matches 
> > this situation. 
> > 
> > Thanks in advance for your help. 
> > 
> > Cindy 
> > 
> > -- 
> > You received this message because you are subscribed to the Google Groups 
> > "sage-devel" group. 
> > To unsubscribe from this group and stop receiving emails from it, send an 
> > email to sage-devel+...@googlegroups.com. 
> > To post to this group, send email to sage-...@googlegroups.com. 
> > Visit this group at http://groups.google.com/group/sage-devel. 
> > For more options, visit https://groups.google.com/d/optout. 
> 
> 
> -- 
> You received this message because you are subscribed to the Google Groups 
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> To unsubscribe from this group and stop receiving emails from it, send an 
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> Visit this group at http://groups.google.com/group/sage-devel.
> For more options, visit https://groups.google.com/d/optout.

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