Thanks.

> On Apr 17, 2020, at 22:46, Dave May <dave.mayhe...@gmail.com> wrote:
> 
> 
> Please always use "reply-all" so that your messages go to the list.
> This is standard mailing list etiquette.  It is important to preserve
> threading for people who find this discussion later and so that we do
> not waste our time re-answering the same questions that have already
> been answered in private side-conversations.  You'll likely get an
> answer faster that way too.
> 
> 
> On Fri, 17 Apr 2020 at 09:20, huabel <hu.ds.a...@icloud.com 
> <mailto:hu.ds.a...@icloud.com>> wrote:
> I have checked that manual, I mean why a new version release include old 
> versions of petsc api, why not update them all to new version?
> 
> 
> I understand now. I thought that the code you couldn't compile was something 
> you wrote, however I now see it is actually living in the PETSc src tree.
> I also note that PLogEvent.c also fails to compile for the same reason.
> 
> The fact the API change was not propagated throughout these two files in 
> src/benchmarks (PetscMalloc.c and PLogEvent.c) is an oversight.
> 
> I am surprised that this did not get caught as: 
> (i) API changes are usually applied via smart scripting, 
> (ii) I imagined that the regression testing would have picked this up issue.
> These files were also broken in v 3.12.
> 
> Thanks for the bug report.
> 
> 
> 
> 
>  
> 
> 
>> On Apr 17, 2020, at 16:10, Dave May <dave.mayhe...@gmail.com 
>> <mailto:dave.mayhe...@gmail.com>> wrote:
>> 
>> Old versions of petsc had 3 args for this function, latest version expects 4 
>> (as the compiler error indicates).
>> 
>> When in doubt as to what these args are, please refer to the extensive man 
>> pages. You can find them all here
>> 
>> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/singleindex.html
>>  
>> <https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/singleindex.html>
>> 
>> The page you want for this func is here
>> 
>> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscOptionsHasName.html
>>  
>> <https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscOptionsHasName.html>
>> 
>> Tip: It is wise to avoid performing a google search of the function name. It 
>> can bring you to the man page for an old version of petsc sometimes and this 
>> can lead to confusion. Best go directly to the URL above (or access the 
>> pages through the petsc web page) to ensure you are looking at the 
>> appropriate man pages
>> 
>> 
>> Thanks
>> Dave
>> 
>> 
>> 
>> On Fri 17. Apr 2020 at 09:43, huabel via petsc-users 
>> <petsc-users@mcs.anl.gov <mailto:petsc-users@mcs.anl.gov>> wrote:
>> Dear PETSc users,
>> 
>> I’m learn some base for PETSc , compile file src/benchmarks/PetscMalloc.c , 
>> get next error. (Use PETSc 3.13.0)
>> 
>> >pwd
>> src/benchmarks
>> 
>> >mpicc PetscMalloc.c 
>> PetscMalloc.c:53:49: error: too few arguments to function call, expected 4, 
>> have 3
>>   ierr = PetscOptionsHasName(NULL,"-malloc",&flg);CHKERRQ(ierr);
>>          ~~~~~~~~~~~~~~~~~~~                    ^
>> /usr/local/include/petscoptions.h:18:1: note: 'PetscOptionsHasName' declared 
>> here
>> PETSC_EXTERN PetscErrorCode PetscOptionsHasName(PetscOptions,const 
>> char[],const char[],PetscBool*);
>> ^
>> /usr/local/include/petscsys.h:106:24: note: expanded from macro 
>> 'PETSC_EXTERN'
>> #  define PETSC_EXTERN extern PETSC_VISIBILITY_PUBLIC
>>                        ^
>> 1 error generated.
>> 
>>  Thanks.
>>    Abel 
> 

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