And seeing as how you are building in debug mode I wonder how you got ipo in 
the first place?  In fact it could be that debug aggressive flags and ipo 
conflict in the compiler in some known way because no one ever does that!

So how did they get there I wonder... Is this a case of a tacc mpicxx setting 
optimized flags internally?

Or could it be that it found different c and cxx compilers...

Hmm - could you post the output from configure?

-Ben



On Mar 30, 2012, at 9:04 PM, "John Peterson" <[email protected]> wrote:

> On Fri, Mar 30, 2012 at 6:19 PM, Andrea Hawkins-Daarud
> <[email protected]> wrote:
>> Hello-
>> 
>> Yesterday I svn up-ed on lonestar but the build crashed unexpectedly.
>> 
>> I'm running with intel/11 compilers and petsc/3.2.
>> 
>> It compiles all the C++ ok, but then on the first C file I get the following:
>> 
>> ...
>> Compiling C++ (in debug mode) src/utils/utility.C...
>> Compiling C++ (in debug mode) src/utils/xdr_cxx.C...
>> Compiling C (in debug mode) src/base/libmesh_isnan.c...
>> Linking 
>> /home1/00639/ahawkins/libmesh/lib/x86_64-unknown-linux-gnu_dbg/libmesh.so
>> (0): internal error: backend signals
>> 
>> icpc: error #10014: problem during multi-file optimization compilation (code 
>> 4)
>> make: *** 
>> [/home1/00639/ahawkins/libmesh/lib/x86_64-unknown-linux-gnu_dbg/libmesh.so]
>> Error 4
>> 
>> 
>> I found a suggestion for a fix involving turning off WPO and adding
>> "/Qipo-" to the compiler command line here:
>> http://software.intel.com/en-us/forums/showthread.php?t=62727
>> 
>> But, that seems more drastic than I would prefer. Is there another
>> obvious thing I'm missing?
> 
> IPO is a more aggressive form of optimization, I don't think it will
> hurt you too bad to turn it off...
> 
> And your code will be infinitely faster running if it compiles :)
> 
> -- 
> John
> 
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