ruby-gsl dep8 fails on ppc64el

[Sergio Durigan Junior]

With the latest update of gsl from Debian, ruby-gsl's dep8 test start failing on ppc64el:

421s ===============================================================================
421s Failure: test_random32_bsd_0(RngTest):
421s random32-bsd, 10000 steps (852261210 observed vs 1663114331 expected).
421s <false> is not true.
421s /tmp/autopkgtest.r5vIrM/build.JWr/src/test/gsl/rng_test.rb:92:in `block (3 levels) in <class:RngTest>'
421s ===============================================================================
421s : (0.007176)
421s test_random32_glibc2_0: .: (0.001215)
421s test_random32_libc5_0: F
421s ===============================================================================
421s Failure: test_random32_libc5_0(RngTest):
421s random32-libc5, 10000 steps (367802360 observed vs 1967452027 expected).
421s <false> is not true.
421s /tmp/autopkgtest.r5vIrM/build.JWr/src/test/gsl/rng_test.rb:92:in `block (3 levels) in <class:RngTest>'
421s ===============================================================================
421s : (0.002615)
421s test_random64_bsd_0: F
421s ===============================================================================
421s Failure: test_random64_bsd_0(RngTest):
421s random64-bsd, 10000 steps (210970120 observed vs 864469165 expected).
421s <false> is not true.
421s /tmp/autopkgtest.r5vIrM/build.JWr/src/test/gsl/rng_test.rb:92:in `block (3 levels) in <class:RngTest>'
421s ===============================================================================
421s : (0.002551)
421s test_random64_glibc2_0: .: (0.001151)
421s test_random64_libc5_0: F
421s ===============================================================================
421s Failure: test_random64_libc5_0(RngTest):
421s random64-libc5, 10000 steps (221021662 observed vs 2106639801 expected).
421s <false> is not true.
421s /tmp/autopkgtest.r5vIrM/build.JWr/src/test/gsl/rng_test.rb:92:in `block (3 levels) in <class:RngTest>'
421s ===============================================================================
421s : (0.002627)

This looks like a precision problem caused by excessive optimization in the architecture.

[Sergio Durigan Junior (sergiodj)]

I built a version of gsl using -O2 instead of -O3 on ppc64el and confirmed that the problem went away.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gsl - 2.7.1+dfsg-5ubuntu1

---------------
gsl (2.7.1+dfsg-5ubuntu1) mantic; urgency=medium

  * d/rules: Use -O2 instead of -O3 on ppc64el. (LP: #2035228)

 -- Sergio Durigan Junior <email address hidden> Tue, 12 Sep 2023 11:47:39 -0400