[petsc-dev] PTScotch problem on Mac

[Matthew Knepley]

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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