Infinite loop (ab)using the parallel test harness facility

[Roberto Bagnara]

Hi there.

The solution we use since several years in the Parma Polyhedra Library
to the problem described in this thread

  http://lists.gnu.org/archive/html/automake/2005-10/msg00058.html

does not work with the parallel test harness facility.  The symptom
is that recompilation with the same set of flags is repeated over
and over again.  The problem goes away if one reverts to the obsolete
serial test harness facility, which would very much like to avoid.
A Makefile.am and script affected by this issue are

  
http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=blob_plain;f=tests/BD_Shape/Makefile.am;hb=HEAD
  
http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=blob_plain;f=tests/BD_Shape/run_tests;hb=HEAD

Does anyone spot the cause of the problem?
Kind regards,

   Roberto

P.S. Reading the manual we took note of the fact that we should
     make changes to Makefile.am, such as using LOG_COMPILER
     instead of TESTS_ENVIRONMENT, but these are orthogonal
     issue (i.e., the observation above is with an empty
     TESTS_ENVIRONMENT).

-- 
     Prof. Roberto Bagnara

Applied Formal Methods Laboratory - University of Parma, Italy
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