[PPL-devel] ppl-0.10.2 check thorough test fail

[David Fang]

Hello,
 	With ppl-0.10.2, several Mac OS X fink users (including myself) 
have observed the following single test failure on 10.5 and 10.6, using 
Apple's gcc-4.2, arch i686-apple-darwin{9,10}, with thorough tests 
enabled:

/usr/bin/grep -E "^Optimum value: " ../../../demos/ppl_lpsol/expected_mpz 
>expected_optima && /usr/bin/grep -E "^Optimum value: " obtained 
>obtained_optima && diff -u expected_optima obtained_optima
--- expected_optima     2011-03-22 21:05:58.000000000 -0400
+++ obtained_optima     2011-03-22 21:05:58.000000000 -0400
@@ -1,9 +1,10 @@
-Optimum value: -3
-Optimum value: 2
+Optimum value: -2
+Optimum value: 1
  Optimum value: 24.33333333
  Optimum value: 43
  Optimum value: 3089
  Optimum value: 5201
+Optimum value: -2
  Optimum value: 0
  Optimum value: 225494.9632
  Optimum value: -464.7531429
@@ -15,8 +16,8 @@
  Optimum value: -73.36896911
  Optimum value: 149.5887662
  Optimum value: 964.30053
-Optimum value: -3.75
-Optimum value: 2.5
+Optimum value: -2
+Optimum value: 1
  Optimum value: -1749.90013
  Optimum value: 0
  Optimum value: 834.6823529
@@ -44,9 +45,10 @@
  Optimum value: 0
  Optimum value: -70
  Optimum value: 0
+Optimum value: -2
  Optimum value: 0
  Optimum value: 3438.2921
-Optimum value: 2.5
+Optimum value: 1
  Optimum value: 46.42857143
  Optimum value: 0
  Optimum value: 0
make[4]: *** [check-local] Error 1

Most fink users that reported this have built ppl against gmp-4.3.2.
I tested a build against gmp-5.0.1 and got the exact same result on 
i686-apple-darwin10.

However, the same set of tests (check thorough) pass *cleanly* on 
powerpc-apple-darwin8 apple-gcc-4.0.1 (ppl-0.10.2 using gmp-4.3.2), which 
took over 4 days to run.

Has anyone else observed this failure on this version/configuration?
How severe is this test failure?

(Unrelated note: ppl-0.11's tests run cleanly on i686-darwin10.)

Fang


David Fang
http://www.csl.cornell.edu/~fang/
http://www.achronix.com/