<br><font size=2 face="sans-serif">I saw this problem with MPICH and C++
in another context. I had to insert the following directive</font>
<br>
<br><font size=2 face="sans-serif">#define MPICH_SKIP_MPICXX</font>
<br>
<br><font size=2 face="sans-serif">Maybe this, or something similar, will
work for you, too.</font>
<br>
<br><font size=2 face="sans-serif">Alan</font>
<br><font size=2 face="sans-serif"><br>
Alan King<br>
Math Sciences<br>
IBM Thomas J Watson Research Center<br>
914-945-1236<br>
http://www.research.ibm.com/people/k/kingaj/</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>"YANG YUAN" <erry.yuan@gmail.com></b>
</font>
<br><font size=1 face="sans-serif">Sent by: coin-discuss-bounces@list.coin-or.org</font>
<p><font size=1 face="sans-serif">06/20/2007 01:00 PM</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Discussions about open source software for Operations Research
<coin-discuss@list.coin-or.org></font></div></table>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">coin-discuss@list.coin-or.org</font>
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<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[COIN-DISCUSS] Problems with MPI application
using COIN</font></table>
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<br><font size=3> </font>
<br><font size=3>Hi,</font>
<br><font size=3> </font>
<br><font size=3>I am working on a MPI application using COIN-cbc, clp
as solvers. The COIN shared libraries have been made using gcc, however,
my own MPI program together with COIN failed to compile using mpicc (a
compiler and linker constructed for MPI application). Instead, i use the
intel C++ compiler "icpc" together with some necessary MPI lib
and include files. Fortunately, the compilation and linking are fine, but
on the other hand, probably it is one of the reason that causes the following
errors. </font>
<br><font size=3> </font>
<br><font size=3>If I add the link flags -cxxlib-gcc or -shared while linking
my program with COIN shared libraries. the executable can be successfully
generated. However, everytime i run it, it directly gives me a seg fault
even without getting into the main function. it is proved by no output
of the first "printf", as shown below. </font>
<br><font size=3> </font>
<br><font size=3>#include ***</font>
<br><font size=3> </font>
<br><font size=3>int<br>
main (int argc, char *argv[])<br>
{<br>
printf ("Beginning of the code.\n");<br>
......</font>
<br><font size=3>}</font>
<br><font size=3> </font>
<br><font size=3> </font>
<br><font size=3> </font>
<br><font size=3>If I get rid of the link flags -cxxlib-gcc or -shared,
the above seg fault is gone. and the Coin utility functions seem to work
fine, but it fails to solve a simple MIP problem with output "Cbc:
LP relaxation is infeasible or too expensive". I write the MIP out,
actually the problem is ok and it can be solved very easily. </font>
<br><font size=3> </font>
<br><font size=3>I am suspecting that there might exist some linking errors,
so that although the libraries (-lCbc -lCgl -lOsiClp -lOsiCbc -lOsi -lClp
-lCoinUtils) have been linked, they don't function well. I sense the usage
of shared libraries might also be a problem, but so far i have no luck
in finding what's wrong. If you have any idea or some experience with using
MPI and COIN together, please kindly provide me some directions. Any suggestion
is extremely appreciated! </font>
<br><font size=3> </font>
<br><font size=3>Thanks!</font>
<br><font size=3> </font>
<br><font size=3>yang</font>
<br><font size=3> </font>
<br><font size=3>p.s. The following is the makefile i am using:</font>
<br><font size=3> </font>
<br><font size=3>/******************************************</font>
<p><font size=3>D2BAC=$(HOME)/D2-MPI</font>
<p><font size=3>CXX = icpc </font>
<p><font size=3># C++ Compiler options<br>
CXXFLAGS = -O2 -unroll0 -mp1 -w -ip<br>
# -cxxlib-gcc -gcc-version=323</font>
<p><font size=3># additional C++ Compiler options for linking<br>
CXXLINKFLAGS =<br>
#-Wl,--rpath -Wl,/home/osu4502/Coin-Cbc/lib -cxxlib-gcc</font>
<p><font size=3># Directory with COIN header files<br>
COININCDIR = $(HOME)/Coin-Cbc-T1/include</font>
<p><font size=3># Directory with COIN libraries<br>
COINLIBDIR = $(HOME)/Coin-Cbc-T1/lib</font>
<p><font size=3># Directory with C library and header files<br>
CINCDIR = /usr/local/intel-8.0-20040716/include/c++<br>
CLIBDIR = /usr/local/intel-8.0-20040716/lib</font>
<p><font size=3># Libraries necessary to link with Clp<br>
LIBS = -L$(COINLIBDIR) -lCbc -lCgl -lOsiClp -lOsiCbc -lOsi -lClp -lCoinUtils
\<br>
-lm -lc \<br>
`cat $(COINLIBDIR)/cgl_addlibs.txt` \<br>
`cat $(COINLIBDIR)/osi_addlibs.txt` \ <br>
`cat $(COINLIBDIR)/clp_addlibs.txt` \<br>
`cat $(COINLIBDIR)/coinutils_addlibs.txt`</font>
<p><font size=3># ------------------------------------------------------------</font>
<p><font size=3>clean :<br>
/bin/rm -rf *.o *~</font>
<p><font size=3>realclean :<br>
/bin/rm -rf *.o *~<br>
/bin/rm -rf *.mps *.ord *.sos *.lp *.sav *.net
*.msg</font>
<p><font size=3># ------------------------------------------------------------</font>
<p><font size=3>d2alg: d2algFuncsV2.o d2algMainV2.o COINInterface.o<br>
$(CXX) $(CXXLINKFLAGS) d2algMainV2.o d2algFuncsV2.o
COINInterface.o -o d2alg $(MPI_LIBS) $(LIBS)<br>
COINInterface.o: $(D2BAC)/ COINInterface.c<br>
$(CXX) -c $(MPI_CFLAGS) $(CXXFLAGS) -I$(COININCDIR)
$(D2BAC)/COINInterface.c -o COINInterface.o<br>
d2algMainV2.o: $(D2BAC)/ d2algMainV2.c<br>
$(CXX) -c $(MPI_CFLAGS) $(CXXFLAGS) -I$(COININCDIR)
$(D2BAC)/d2algMainV2.c -o d2algMainV2.o<br>
d2algFuncsV2.o: $(D2BAC)/ d2algFuncsV2.c<br>
$(CXX) -c $(MPI_CFLAGS) $(CXXFLAGS) -I$(CINCDIR)
-I$(COININCDIR) $(D2BAC)/d2algFuncsV2.c -o d2algFuncsV2.o</font><tt><font size=2>_______________________________________________<br>
Coin-discuss mailing list<br>
Coin-discuss@list.coin-or.org<br>
http://list.coin-or.org/mailman/listinfo/coin-discuss<br>
</font></tt>
<p>