[ruby-core:102942] [Ruby master Bug#16774] Don't require sub-word atomics

Issue #16774 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.5: REQUIRED, 2.6: REQUIRED, 2.7: REQUIRED to 2.5: REQUIRED, 2.6: REQUIRED, 2.7: DONE

ruby_2_7 ba6f0879448ebc80c7a595c369c59b6d8dfbdf3e merged revision(s) abe2e7de4d1f2d5861d7c9ab9c7e778f2ee1dcd2.

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Bug #16774: Don't require sub-word atomics
https://bugs.ruby-lang.org/issues/16774#change-91008

* Author: schwab (Andreas Schwab)
* Status: Closed
* Priority: Normal
* Backport: 2.5: REQUIRED, 2.6: REQUIRED, 2.7: DONE
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On some architectures (like RISC-V) sub-word atomics are only available
when linking against -latomic, but the configure script doesn't do that,
causing the atomic checks to fail and the resulting ruby binary is
non-functional.  Ruby does not use sub-word atomic operations, rb_atomic_t
is defined to unsigned int, so use unsigned int when checking for atomic
operations.


---Files--------------------------------
0001-Don-t-require-sub-word-atomics.patch (1.41 KB)


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