[PerfSuite-bugs] Re: always the same

[Rick K. <rk...@nc...>]

Giuseppe,

On Wed, 30 Nov 2005 gg...@un... wrote:

> I arrived at the same conclusion when looking that it works with g77. Now I
> would like to know if I can configure with both ifort and icc and if I have just
>  to add -F77=ifort -GCC=icc after all in the configure line.
> In addition, may I have perfsuite configured for both GNU and Intel compilers?
> Thanks, Giuseppe.

This is a reasonable question and in fact something that we have to do 
here, in a multi-compiler environment.  The thing to remember is that the 
important point is the Fortran-C calling convention, which is different 
for g77 and ifort.  For C programs, it shouldn't matter.  PerfSuite should 
always be built with gcc (not icc).  What works for us is to build two 
separate versions of the libraries, one to be used with g77-compiled 
Fortran programs, the other for ifort-compiled Fortran programs.  We 
request a separate subdirectory in the final install that is specific to 
the Intel version.

The general "template" is something like this:

1% ./configure <options>
2% make
3% make install

4% ./configure <options> --libdir=/usr/local/lib/intel F77=ifort
5% make
6% make install

Steps 1-3 build a g77-compatible version of PerfSuite and installs the 
libraries in /usr/local/lib.  Steps 4-6 build an ifort-compatible version 
of PerfSuite and installs the libraries in /usr/local/lib/intel.  When 
linking an application, you select the appropriate one and also set the 
LD_LIBRARY_PATH variable according to the Fortran compiler you are using.

Commands like psrun should work regardless, what I am describing here is 
only needed for applications that use the PerfSuite API (like the matvec 
example).

I hope this clears up a bit more of the confusion.

Thanks for hanging in there!

Rick