CODEWITHSUNDEEP
c++ogdf
jsj
jsj

Reputation: 9421

gcc Linker and OGDF "undefined reference to `ogdf::Initialization::Initialization()'"

I am trying to get OGDF working to see if it is suitable for my project, but I am having trouble with a sample program.

I am trying to compile this example program:

#include <ogdf/basic/Graph.h>
#include <ogdf/basic/graph_generators.h>
#include <ogdf/layered/DfsAcyclicSubgraph.h>

using namespace ogdf;

int main()
{
    Graph G;
    randomSimpleGraph(G, 10, 20);
    DfsAcyclicSubgraph DAS;
    DAS.callAndReverse(G);
    G.writeGML("test.gml");

    return 0;
}

using this command:

$g++ -pthread -I ./OGDF/ -L ./OGDF/_release/ -lOGDF test2.cpp

But I get the following error

/tmp/ccbpkfdt.o: In function `main':
test2.cpp:(.text+0x12): undefined reference to `ogdf::Graph::Graph()'
test2.cpp:(.text+0x2e): undefined reference to `ogdf::randomSimpleGraph(ogdf::Graph&, int, int)'
test2.cpp:(.text+0x4e): undefined reference to `ogdf::AcyclicSubgraphModule::callAndReverse(ogdf::Graph&)'
test2.cpp:(.text+0x62): undefined reference to `ogdf::Graph::writeGML(char const*) const'
test2.cpp:(.text+0x7f): undefined reference to `ogdf::Graph::~Graph()'
test2.cpp:(.text+0xa1): undefined reference to `ogdf::Graph::~Graph()'
/tmp/ccbpkfdt.o: In function `__static_initialization_and_destruction_0(int, int)':
test2.cpp:(.text+0xfb): undefined reference to `ogdf::Initialization::Initialization()'
test2.cpp:(.text+0x112): undefined reference to `ogdf::Initialization::~Initialization()'
/tmp/ccbpkfdt.o: In function `ogdf::DfsAcyclicSubgraph::DfsAcyclicSubgraph()':
test2.cpp:(.text._ZN4ogdf18DfsAcyclicSubgraphC2Ev[_ZN4ogdf18DfsAcyclicSubgraphC5Ev]+0x16): undefined reference to `vtable for ogdf::DfsAcyclicSubgraph'
/tmp/ccbpkfdt.o: In function `ogdf::DfsAcyclicSubgraph::~DfsAcyclicSubgraph()':
test2.cpp:(.text._ZN4ogdf18DfsAcyclicSubgraphD2Ev[_ZN4ogdf18DfsAcyclicSubgraphD5Ev]+0xb): undefined reference to `vtable for ogdf::DfsAcyclicSubgraph'
collect2: error: ld returned 1 exit status

I tried compiling hello world, with an include from OGDF, and I still got:

undefined reference to `ogdf::Initialization::Initialization()'

I think I am not linking properly or something?

Upvotes: 3

Views: 1424

Answers (2)

Man of One Way
Man of One Way

Reputation: 3980

You have to be very careful in which order you type stuff when linking with a library. Try putting test2.cpp before -lOGDF instead, like this:

g++ -pthread -I ./OGDF/ -L ./OGDF/_release/ test2.cpp -lOGDF

Upvotes: 2

Pietro Cerutti
Pietro Cerutti

Reputation: 71

You must build your program using the -DOGDF_DLL when using OGDF as a shared library.

See here: http://www.ogdf.net/doku.php/tech:defines

Upvotes: 0

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