[petsc-dev] PTScotch problem on Mac

[Barry Smith]

  I would normally say make a pull request but they have their own git server that requires you ask them for an account so I suggest posting an issue with your patch.

  Barry


> On Nov 23, 2021, at 10:55 AM, Matthew Knepley <knepley at gmail.com> wrote:
> 
> This is the same flex problem as I had for c2html, but I was more determined tracking it down this time. The first problem is that we were not renaming in the parser,
> 
> main *$:/PETSc3/petsc/petsc-dev$ git diff
> diff --git a/config/BuildSystem/config/packages/PTScotch.py b/config/BuildSystem/config/packages/PTScotch.py
> index d1c277b6e9f..e046804c17f 100644
> --- a/config/BuildSystem/config/packages/PTScotch.py
> +++ b/config/BuildSystem/config/packages/PTScotch.py
> @@ -70,7 +70,7 @@ class Configure(config.package.Package):
>      if self.libraries.add('-lrt','timer_create'): ldflags += ' -lrt'
>      self.cflags = self.cflags + ' -DCOMMON_RANDOM_FIXED_SEED'
>      # do not use -DSCOTCH_PTHREAD because requires MPI built for threads.
> -    self.cflags = self.cflags + ' -DSCOTCH_RENAME -Drestrict="'+self.compilers.cRestrict+'"'
> +    self.cflags = self.cflags + ' -DSCOTCH_RENAME -DSCOTCH_RENAME_PARSER -Drestrict="'+self.compilers.cRestrict+'"'
>      # this is needed on the Mac, because common2.c includes common.h which DOES NOT include mpi.h because
>      # SCOTCH_PTSCOTCH is NOT defined above Mac does not know what clock_gettime() is!
>      if self.setCompilers.isDarwin(self.log):
> 
> Second, they were not treating this case completely correctly:
> 
> (93454e8...):/PETSc3/petsc/petsc-dev/arch-master-debug/externalpackages/git.ptscotch/src/libscotch$ git diff HEAD~1
> diff --git a/src/libscotch/parser_yy.h b/src/libscotch/parser_yy.h
> index 931315d..95b8160 100644
> --- a/src/libscotch/parser_yy.h
> +++ b/src/libscotch/parser_yy.h
> @@ -62,6 +62,9 @@
> 
>  #if ((defined SCOTCH_RENAME_PARSER) || (defined yylex)) /* If prefix renaming    */
>  #define scotchyyparse               stratParserParse2 /* Parser function name    */
> +#if !defined(yylex)
> +#define yylex                       scotchyylex
> +#endif
>  #ifndef yylval
>  #define yylval                      SCOTCH_NAME_MACRO3 (scotchyy, SCOTCH_NAME_SUFFIXC, lval) /* It should be Yacc/Bison's job to redefine it!
>  */
>  #endif /* yylval              */
> 
> How should we go about getting this fix in? Do you need to have our own branch of PTScotch?
> 
>   Thanks,
> 
>      Matt
> 
> -- 
> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
> -- Norbert Wiener
> 
> https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>

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