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<p class="MsoNormal"><span style="font-size:11.0pt">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I would appreciate if you could give some advice for setting the ‘FormFunction’ for the MatFDColoringSetFunction function call.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I follow what is shown in the example:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><a href="https://petsc.org/release/src/snes/tutorials/ex14.c.html">https://petsc.org/release/src/snes/tutorials/ex14.c.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I setup similar code structure like:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">PetscErrorCode FormFunction(SNES,Vec,Vec,void*);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Then use it as:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">MatFDColoringSetFunction(fdcoloring, (PetscErrorCode(*)(void))SNESFormFunction, this);<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">This works fine on my local MacOS. However, when commit it to a remote repo, the compiler there gives me the following error (where warnings are treated as errors):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">src/base/PETScProblemInterface.C:100:67: error:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">cast between incompatible function types from
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">'PetscErrorCode (*)(SNES, Vec, Vec, void*)' {aka 'int (*)(_p_SNES*, _p_Vec*, _p_Vec*, void*)'}
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">to <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">'PetscErrorCode (*)()' {aka 'int (*)()'} [-Werror=cast-function-type]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Any help is appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-Ling<o:p></o:p></span></p>
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