<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div> Thanks for the alternative. <div class=""><br class=""></div><div class=""> @jed does this mean we need to do our casting of functions like this everywhere?</div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 11, 2022, at 12:11 PM, Zou, Ling <<a href="mailto:lzou@anl.gov" class="">lzou@anl.gov</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">A follow up:<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">The compiler option<span class="Apple-converted-space"> </span><span style="font-size: 9pt; font-family: Monaco; color: rgb(29, 28, 29);" class="">'-Wno-bad-function-cast'<span class="Apple-converted-space"> </span></span>did not work for c++. See message below:<o:p class=""></o:p></div><p class="MsoNormal" style="margin: 0in 0in 3pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 9pt; font-family: Monaco; color: rgb(29, 28, 29);" class="">cc1plus: error: command line option '-Wno-bad-function-cast' is valid for C/ObjC but not for C++ [-Werror]<o:p class=""></o:p></span></p><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Credit to David Andrs of INL, here is an alternative solution:<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 9pt; font-family: Monaco;" class="">MatFDColoringSetFunction(fdcoloring, </span><span style="font-size: 9pt; font-family: Monaco;" class=""><o:p class=""></o:p></span></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 9pt; font-family: Monaco;" class=""> (PetscErrorCode(*)(void))(void(*)(void))SNESFormFunction, this);</span><span style="font-size: 9pt; font-family: Monaco;" class=""><o:p class=""></o:p></span></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Thanks,<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">-Ling<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in;" class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 11pt; font-family: Calibri, sans-serif;"><b class=""><span style="font-size: 12pt;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-size: 12pt;" class="">petsc-users <<a href="mailto:petsc-users-bounces@mcs.anl.gov" style="color: blue; text-decoration: underline;" class="">petsc-users-bounces@mcs.anl.gov</a>> on behalf of Zou, Ling via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" style="color: blue; text-decoration: underline;" class="">petsc-users@mcs.anl.gov</a>><br class=""><b class="">Date:<span class="Apple-converted-space"> </span></b>Monday, January 10, 2022 at 9:23 PM<br class=""><b class="">To:<span class="Apple-converted-space"> </span></b>Barry Smith <<a href="mailto:bsmith@petsc.dev" style="color: blue; text-decoration: underline;" class="">bsmith@petsc.dev</a>><br class=""><b class="">Cc:<span class="Apple-converted-space"> </span></b>PETSc <<a href="mailto:petsc-users@mcs.anl.gov" style="color: blue; text-decoration: underline;" class="">petsc-users@mcs.anl.gov</a>><br class=""><b class="">Subject:<span class="Apple-converted-space"> </span></b>Re: [petsc-users] A problem with MatFDColoringSetFunction<o:p class=""></o:p></span></p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Thank you Barry.</div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">-Ling</div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="border-style: solid none none; border-top-width: 1pt; border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in;" class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 11pt; font-family: Calibri, sans-serif;"><b class=""><span style="font-size: 12pt;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-size: 12pt;" class="">Barry Smith <<a href="mailto:bsmith@petsc.dev" style="color: blue; text-decoration: underline;" class="">bsmith@petsc.dev</a>><br class=""><b class="">Date:<span class="Apple-converted-space"> </span></b>Monday, January 10, 2022 at 5:13 PM<br class=""><b class="">To:<span class="Apple-converted-space"> </span></b>Zou, Ling <<a href="mailto:lzou@anl.gov" style="color: blue; text-decoration: underline;" class="">lzou@anl.gov</a>><br class=""><b class="">Cc:<span class="Apple-converted-space"> </span></b>PETSc <<a href="mailto:petsc-users@mcs.anl.gov" style="color: blue; text-decoration: underline;" class="">petsc-users@mcs.anl.gov</a>><br class=""><b class="">Subject:<span class="Apple-converted-space"> </span></b>Re: [petsc-users] A problem with MatFDColoringSetFunction<o:p class=""></o:p></span></p></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> This is annoying. You need to pass in a compiler flag to turn off the error conditioner for casting a function pointer. It may be -Wnoerror=cast-function-type just google.</div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> Barry</div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><p class="MsoNormal" style="margin: 0in 0in 12pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p class=""> </o:p></p><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class=""><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">On Jan 10, 2022, at 4:35 PM, Zou, Ling via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" style="color: blue; text-decoration: underline;" class="">petsc-users@mcs.anl.gov</a>> wrote:</div></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Hi All,<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">I would appreciate if you could give some advice for setting the ‘FormFunction’ for the MatFDColoringSetFunction function call.<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">I follow what is shown in the example:<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><a href="https://petsc.org/release/src/snes/tutorials/ex14.c.html" style="color: blue; text-decoration: underline;" class=""><span style="color: rgb(5, 99, 193);" class="">https://petsc.org/release/src/snes/tutorials/ex14.c.html</span></a><span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">I setup similar code structure like:<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">PetscErrorCode FormFunction(SNES,Vec,Vec,void*);<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Then use it as:<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">MatFDColoringSetFunction(fdcoloring, (PetscErrorCode(*)(void))SNESFormFunction, this);<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">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):<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">src/base/PETScProblemInterface.C:100:67: error:<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">cast between incompatible function types from<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">'PetscErrorCode (*)(SNES, Vec, Vec, void*)' {aka 'int (*)(_p_SNES*, _p_Vec*, _p_Vec*, void*)'}<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">to<span class="apple-converted-space"> </span><span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">'PetscErrorCode (*)()' {aka 'int (*)()'} [-Werror=cast-function-type]<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Any help is appreciated.<span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""> <span style="font-size: 12pt;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">-Ling</div></div></div></blockquote></div></div></div></div></blockquote></div><br class=""></div></body></html>