Originally posted by: sidgalt

Hey,

I need to use IloCplex and IloSolver together. Unfortunately, whenever I try to compile them together, I get linking errors full of references to "undefined reference to IloAlgorithmI".

Any help would be appreciated.

Thanks
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Originally posted by: SystemAdmin

Seems like you are not linking with all required libraries or linking in the wrong order.
What version/platform do you use?
What is your linker command line?
What is the exact error message?
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Originally posted by: sidgalt

Hey,
I'm using Debian Lenny 5. Here's the relevant part of the makefile :-

SOLVERDIR=/com/ilog/solver64.lintel
CONCERTDIR=$(SOLVERDIR)/../concert24
CPLEXDIR=/com/ilog/cplex100.lintel/cplex100
 
EXDIR=$(SOLVERDIR)/examples
EXSRC=$(EXDIR)/src
EXINC=$(EXDIR)/include
EXDATA=$(EXDIR)/data
 
CPLEXINCDIR   = $(CPLEXDIR)/include
SOLVERIncDir=$(SOLVERDIR)/include
CONCERTIncDir=$(CONCERTDIR)/include
 
DEMODIR=$(SOLVERDIR)/examples
DEMOSRCDIR=$(DEMODIR)/src
 
CPLEXLIBDIR   = $(CPLEXDIR)/lib/$(SYSTEM)/$(LIBFORMAT)
CPLEXBINDIR   = $(CPLEXDIR)/bin/$(BINDIST)
CPLEXJARDIR   = $(CPLEXDIR)/lib/cplex.jar
 
CFLAGS=$(CSYSFLAGS) $(OPT) $(OPTIONS) -I$(SOLVERIncDir) -I$(CONCERTIncDir) -I$(EXINC) $(CMTFLAGS) -I$(CPLEXINCDIR)
 
LDFLAGS=-L$(SOLVERDIR)/lib/$(SYSTEM)/$(LIBFORMAT) -lsolver -lsolverfloat \ 
-L$(CONCERTDIR)/lib/$(SYSTEM)/$(LIBFORMAT) -lconcert $(LDSYSFLAGS) $(LDMTFLAGS) $(LIBS) -L$(CPLEXLIBDIR) \
-lilocplex -lcplex

CFLAGS are the include flags and LDFLAGS are the library flags

Here's part of the error message :

/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilocplex.o):(.gnu.linkonce.d._ZTV9IloBoundI+0x48): undefined reference to `IloExtractableI::expandTo(IloModelI*) const'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::removeForAll(IloForAllI const*, IloCplexI::Data*)':
ilodeflpextr.cpp:(.text+0x976): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloCplexExtractForallOp::applyAnd(void*, IloExtractableI const*, IloExtractableI const*)':
ilodeflpextr.cpp:(.text+0xbd7): undefined reference to `IloAlgorithmI::getModelEvaluator()'
ilodeflpextr.cpp:(.text+0xc03): undefined reference to `IloForAllRange::IloForAllRange(IloEnv, IloForAllI*, long, void*, char*)'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloCplexExtractForallOp::apply(void*, IloExtractableI const*, IloExtractableI const*)':
ilodeflpextr.cpp:(.text+0xc8e): undefined reference to `IloAlgorithmI::getModelEvaluator()'
ilodeflpextr.cpp:(.text+0xcf4): undefined reference to `IloForAllRange::IloForAllRange(IloEnv, IloForAllI*, long, void*, char*)'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractForAll(IloForAllI const*, IloCplexI::Data**)':
ilodeflpextr.cpp:(.text+0x237f): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::removeConditionalConstraint(IloConditionalConstraintI const*, IloCplexI::Data*)':
ilodeflpextr.cpp:(.text+0x2907): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractConditionalConstraint(IloConditionalConstraintI const*, IloCplexI::Data**)':
ilodeflpextr.cpp:(.text+0x2edf): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractBinaryNumConstraint(IloBinaryNumConstraintI const*, int, int**)':

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Originally posted by: SystemAdmin

IloExtractableI::expandTo(IloModel*) is defined in libconcert.a and referenced from libilocplex.a.
Thus -lilocplex should be before -lconcert in the linker argument list. Does it help to put -lconcert
at the back of the linker command line?
Or even better, does your compiler/linker support something like '--start-group' and '--end-group'
and you can wrap all ILOG libraries between that?
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: sidgalt

>> Does it help to put -lconcert at the back of the linker command line?

I tried that but it is still failing

>> does your compiler/linker support something like '--start-group' and '--end-group' and you can wrap all ILOG libraries between that?

I'm using g++ so I think it does. Could you give an example of how to do that?

Thanks
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: sidgalt

Here's the new error message btw,

/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilocplex.o):(.gnu.linkonce.d._ZTV9IloBoundI+0x48): undefined reference to `IloExtractableI::expandTo(IloModelI*) const'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::removeForAll(IloForAllI const*, IloCplexI::Data*)':
ilodeflpextr.cpp:(.text+0x976): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloCplexExtractForallOp::applyAnd(void*, IloExtractableI const*, IloExtractableI const*)':
ilodeflpextr.cpp:(.text+0xbd7): undefined reference to `IloAlgorithmI::getModelEvaluator()'
ilodeflpextr.cpp:(.text+0xc03): undefined reference to `IloForAllRange::IloForAllRange(IloEnv, IloForAllI*, long, void*, char*)'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloCplexExtractForallOp::apply(void*, IloExtractableI const*, IloExtractableI const*)':
ilodeflpextr.cpp:(.text+0xc8e): undefined reference to `IloAlgorithmI::getModelEvaluator()'
ilodeflpextr.cpp:(.text+0xcf4): undefined reference to `IloForAllRange::IloForAllRange(IloEnv, IloForAllI*, long, void*, char*)'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractForAll(IloForAllI const*, IloCplexI::Data**)':
ilodeflpextr.cpp:(.text+0x237f): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::removeConditionalConstraint(IloConditionalConstraintI const*, IloCplexI::Data*)':
ilodeflpextr.cpp:(.text+0x2907): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractConditionalConstraint(IloConditionalConstraintI const*, IloCplexI::Data**)':
ilodeflpextr.cpp:(.text+0x2edf): undefined reference to `IloAlgorithmI::getModelEvaluator()'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilodeflpextr.o): In function `IloDefaultLPExtractor::extractBinaryNumConstraint(IloBinaryNumConstraintI const*, int, int**)':
ilodeflpextr.cpp:(.text+0x461a): undefined reference to `IloAlgorithmI::getModelEvaluator()'
ilodeflpextr.cpp:(.text+0x4645): undefined reference to `IloModelEvaluatorI::hasSubstitutionExpr(IloNumExprI const*) const'
ilodeflpextr.cpp:(.text+0x4810): undefined reference to `IloModelEvaluatorI::hasSubstitutionExpr(IloNumExprI const*) const'
ilodeflpextr.cpp:(.text+0x4829): undefined reference to `IloModelEvaluatorI::getSubstitutionAsNumExpr(IloNumExprI const*) const'
ilodeflpextr.cpp:(.text+0x487f): undefined reference to `IloModelEvaluatorI::getSubstitutionAsNumExpr(IloNumExprI const*) const'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilologicextr.o):(.gnu.linkonce.d._ZTV18IloRangeIndicatorI+0x48): undefined reference to `IloExtractableI::expandTo(IloModelI*) const'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilologicextr.o):(.gnu.linkonce.d._ZTV18IloNumEqIndicatorI+0x48): undefined reference to `IloExtractableI::expandTo(IloModelI*) const'
/com/ilog/cplex100.lintel/cplex100/lib/x86_rhel4.0_3.4/static_pic/libilocplex.a(ilologicextr.o):(.gnu.linkonce.d._ZTV18IloNumGeIndicatorI+0x48): undefined reference to `IloExtractableI::expandTo(IloModelI*) const'

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Originally posted by: SystemAdmin

To use the start/end-group stuff you add '-Wl,--start-group' (note: no blanks) before the first ILOG library and '-Wl,--end-group' after the last ILOG library. The linker will then search all the libraries until it finds no more undefined references.
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Originally posted by: sidgalt

For some reason it is still giving the same errors as before. Do you know where I could find a sample makefile so I could see where exactly I was going wrong?

Thanks
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

Hi!

You cannot link CPLEX 10.0 to Concert 2.4 since they have different ABI. Always use versions that are aligned to each other. CPLEX 10.0 for instance requires Concert 2.2. That also means that if you need to use CPLEX and Solver in the same binary these two products need to be aligned (from the same release period) as well.

Robert
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Originally posted by: sidgalt

Hey, changing Cplex10 to Cplex10.2 worked

Thanks a lot
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