[Bug]: NegativeNaN test fails on riscv64

[NeilHanlon]

Describe the issue

When building abseil-cpp for riscv64 Fedora, we discovered one test fails:

+ # [==========] 125 tests from 35 test suites ran. (3501 ms total)
+ # [  PASSED  ] 124 tests.
+ # [  FAILED  ] 1 test, listed below:
+ # [  FAILED  ] FloatingPointLogFormatTest/0.NegativeNaN, where TypeParam = float
+ #  1 FAILED TEST

Disabling this test allows the build to complete properly: https://src.fedoraproject.org/rpms/abseil-cpp/pull-request/19

It appears that this is related to WebAssembly/design#646

Steps to reproduce the problem

Build abseil-cpp on riscv64

What version of Abseil are you using?

20240116.2

What operating system and version are you using?

Fedora (rawhide) - 41

What compiler and version are you using?

gcc-14.1.1-4.fc41 / clang-18.1.3-2.0.riscv64.fc40

What build system are you using?

cmake-3.28.3-4.fc41

Additional context

No response

[derekmauro]

This might be of interest to @bbarenblat

[bbarenblat]

Debian has observed this as well, and this test is disabled there too. We probably should apply the Debian patch here, at least until LWG 4101 is resolved. (Depending on the resolution, we may need to remove this particular test for all architectures.)