[Bug-gsl] multifit test failures for Solaris x86 with libgsl 2.1

[Rich Burridge]

Hi,

I'm finally getting around to integrating libgsl 2.1 into Solaris 12.
One thing I've noticed is that I'm now seeing multifit test failures
on the x86 platform but only for 32-bit (64-bit is fine):

...
Making check in multifit
/usr/gnu/bin/make  test
/usr/gnu/bin/make  check-TESTS
FAIL: lmsder/scale=1/wnlin_internal_weights i=0 (5.17378552263401126 
observed vs 5.17378551196259195 expected) [190002]
FAIL: lmsder/scale=1/wnlin_internal_weights i=1 (0.111041758485330988 
observed vs 0.111041758006851149 expected) [190003]
FAIL: lmsder/scale=1/wnlin_internal_weights i=2 (1.05282724326308363 
observed vs 1.05282724070446099 expected) [190004]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=0 
(5.17378552263401126 observed vs 5.17378551196259195 expected) [190007]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=1 
(0.111041758485330988 observed vs 0.111041758006851149 expected) [190008]
FAIL: lmsder/scale=1/weights/wnlin_internal_weights i=2 
(1.05282724326308363 observed vs 1.05282724070446099 expected) [190009]
FAIL: ridge/lmsder/wnlin_internal_weights i=0 (5.17378552263401126 
observed vs 5.17378551196259195 expected) [190022]
FAIL: ridge/lmsder/wnlin_internal_weights i=1 (0.111041758485330988 
observed vs 0.111041758006851149 expected) [190023]
FAIL: ridge/lmsder/wnlin_internal_weights i=2 (1.05282724326308363 
observed vs 1.05282724070446099 expected) [190024]
FAIL: lmsder/scale=1/wnlin_external_weights i=0 (5.17378552263401126 
observed vs 5.17378551196259195 expected) [190042]
FAIL: lmsder/scale=1/wnlin_external_weights i=1 (0.111041758485330988 
observed vs 0.111041758006851149 expected) [190043]
FAIL: lmsder/scale=1/wnlin_external_weights i=2 (1.05282724326308363 
observed vs 1.05282724070446099 expected) [190044]
FAIL: ridge/lmsder/wnlin_external_weights i=0 (5.17378552263401126 
observed vs 5.17378551196259195 expected) [190052]
FAIL: ridge/lmsder/wnlin_external_weights i=1 (0.111041758485330988 
observed vs 0.111041758006851149 expected) [190053]
FAIL: ridge/lmsder/wnlin_external_weights i=2 (1.05282724326308363 
observed vs 1.05282724070446099 expected) [190054]
FAIL: test
==================
1 of 1 test failed
==================
make[3]: [check-TESTS] Error 1 (ignored)
...

Is this another case where the tolerances just need to be tweaked,
similar to what we recently did with the linalg tests?

See:

  http://lists.gnu.org/archive/html/help-gsl/2015-05/msg00001.html
  http://lists.gnu.org/archive/html/help-gsl/2015-06/msg00000.html

Thanks.