[petsc-dev] PTScotch problem on Mac

[Satish Balay]

Well we don't have this issue on our (macos) CI boxes where both c2html and scotch build and run daily [in CI]

what 'flex' are you using? And why does it behave differently on your box?

And what errors do you get?

Perhaps CI is using older xcode (command line tools) - and you are using newer? Or something else?

Barry - do you have this issue on your machine?

balay at ypro ~ % which flex
/usr/bin/flex
balay at ypro ~ % /usr/bin/flex --version
flex 2.5.35 Apple(flex-32)
balay at ypro petsc % clang -v
Apple clang version 12.0.0 (clang-1200.0.32.2)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
balay at ypro ~ % balay at ypro petsc % ./configure --with-mpi-dir=$HOME/mpich-3.4.2 --download-c2html --download-ptscotch

<log attached>


Satish

On Tue, 23 Nov 2021, Matthew Knepley 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
> 
> 
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