[Bug-gsl] libgsl 2.3 + gcc7 on i586 test failures

[Adam Majer]

I'm seeing test failures with new GCC 7 (7.1.1+r247574) on OpenSUSE
Tumbleweed.. So something is amiss here.... These tests all pass with GCC 6.

All tests are passing on x86_64 with all compilers.

I can attach complete build log if requested.

> [  209s] ======================================
> [  209s]    gsl 2.3: specfunc/test-suite.log
> [  209s] ======================================
> [  209s] 
> [  209s] # TOTAL: 1
> [  209s] # PASS:  0
> [  209s] # SKIP:  0
> [  209s] # XFAIL: 0
> [  209s] # FAIL:  1
> [  209s] # XPASS: 0
> [  209s] # ERROR: 0
> [  209s] 
> [  209s] .. contents:: :depth: 2
> [  209s] 
> [  209s] FAIL: test
> [  209s] ==========
> [  209s] 
> [  209s] FAIL: schmidt csphase=1 deriv2 i=102 (-1.42436215874661529e-16 
> observed vs -1.42460074537287091e-16 expected) [9186711]
> [  209s] FAIL: schmidt csphase=1 deriv2 i=776 (1.85098628876862506e-16 
> observed vs 1.85127865747637551e-16 expected) [9187385]
> [  209s] FAIL: schmidt csphase=-1 deriv2 i=102 (-1.42436215874661529e-16 
> observed vs -1.42460074537287091e-16 expected) [15218755]
> [  209s] FAIL: schmidt csphase=-1 deriv2 i=776 (1.85098628876862506e-16 
> observed vs 1.85127865747637551e-16 expected) [15219429]
> [  209s] FAIL test (exit status: 1)
> [  209s] 
> [  209s] ./specfunc/test.log
> [  209s] FAIL: schmidt csphase=1 deriv2 i=102 (-1.42436215874661529e-16 
> observed vs -1.42460074537287091e-16 expected) [9186711]
> [  209s] FAIL: schmidt csphase=1 deriv2 i=776 (1.85098628876862506e-16 
> observed vs 1.85127865747637551e-16 expected) [9187385]
> [  209s] FAIL: schmidt csphase=-1 deriv2 i=102 (-1.42436215874661529e-16 
> observed vs -1.42460074537287091e-16 expected) [15218755]
> [  209s] FAIL: schmidt csphase=-1 deriv2 i=776 (1.85098628876862506e-16 
> observed vs 1.85127865747637551e-16 expected) [15219429]
> [  209s] FAIL test (exit status: 1)