[Bug-gsl] Test failure with gsl_sf_synchrotron_1_e on x86

[A. Wilcox]

gsl-2.4 fails its test suite on x86, when configured to build for
Pentium MMX:



FAIL: test
==========

FAIL: gsl_sf_synchrotron_1_e(0.01, &r) [54784666]
  expected: 4.4497250411421063e-01
  obtained: -1.8137993642342178e-02 +/- 1.2082330897339797e-17
(rel=6.66134e-16)
  fracdiff: 1.0849884121238955e+00
 tolerance: 4.4408920985006262e-16
  value/expected not consistent within reported error
  value not within tolerance of expected value
  -1.813799364234217754e-02  1.208233089733979683e-17
FAIL: Synchrotron Functions [54784674]



Environment:

libc: musl libc (i386) Version 1.1.19

gcc: gcc (Adelie 6.4.0) 6.4.0

ld: GNU ld (GNU Binutils) 2.30

CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz

uname -a: Linux zach 4.7.0-zach #1 SMP Sat Jul 30 20:37:18 CDT 2016 i686
GNU/Linux

CFLAGS: -O2 -march=pentium-mmx -mtune=pentium-m -fno-omit-frame-pointer

-- 
A. Wilcox (awilfox)
Project Lead, Adélie Linux
http://adelielinux.org

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