Bug #16774: Don't require sub-word atomics

• Status: Open
• Priority: Normal
• Assignee: -
• Target version: -
• Backport: 2.5: REQUIRED, 2.6: REQUIRED, 2.7: REQUIRED

[schwab (Andreas Schwab)]

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.

[nobu (Nobuyoshi Nakada)]

• Backport changed from 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN to 2.5: REQUIRED, 2.6: REQUIRED, 2.7: REQUIRED

[mame (Yusuke Endoh)]

• Has duplicate Bug #16800: [riscv64-linux] miniruby: thread_pthread.c:1935: rb_sigwait_fd_put: Assertion `old == th' failed. added

[mame (Yusuke Endoh)]

Great. Thank you.