[Webkit-unassigned] [Bug 222959] Build fails on RISCV with GCC 11

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=222959

Daniel Kolesa <dkolesa at igalia.com> changed:

           What    |Removed                     |Added
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                 CC|                            |dkolesa at igalia.com

--- Comment #2 from Daniel Kolesa <dkolesa at igalia.com> ---
there is already build system stuff in place to check for libatomic (since a bunch of 32-bit targets, notably armv6, powerpc and mips, do not have hardware 64-bit operations)

risc-v has them, but __atomic_compare_exchange_1 is a 1-byte CAS, and operations on values less than 4 bytes are apparently not always lock-free on risc-v, so basically you just need to extend the existing checks that are in place

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