<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div><br></div><div>I've been trying to build/link src/snes/tutorials/examples/ex15.c for the case that I have defined 'clanguage' to</div><div>be C++ on the configure line. I get the following error:</div><div><br></div><div><div>Undefined symbols for architecture x86_64:</div><div> "SNESPicardComputeFunction(_p_SNES*, _p_Vec*, _p_Vec*, void*)", referenced from:</div><div> _main in ex15.o</div><div> "SNESPicardComputeJacobian(_p_SNES*, _p_Vec*, _p_Mat**, _p_Mat**, MatStructure*, void*)", referenced from:</div><div> _main in ex15.o</div><div>ld: symbol(s) not found for architecture x86_64</div><div>collect2: ld returned 1 exit status</div><div>make: [ex15] Error 1 (ignored)</div><div>/bin/rm -f ex15.o</div><div><br></div><div>The error appears related to name mangling and can be fixed if I add:</div><div><br></div><div>extern "C" {</div><div><div> extern PetscErrorCode SNESPicardComputeFunction(SNES,Vec,Vec,void*);</div><div> extern PetscErrorCode SNESPicardComputeJacobian(SNES,Vec,Mat*,Mat*,MatStructure*,void*);</div></div><div>}</div><div><br></div><div>to the top of src/snes/tutorials/examples/ex15.c. Note that this error does not occur if building PETSc with default </div><div>settings where the C compiler is used to build the library and the example.</div><div><br></div><div>Thanks,</div><div>Travis</div><div><br></div><div><br></div><div apple-content-edited="true">
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