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[3.12] GH-115978: Disable *readv() and *writev() on WASI (GH-116228) (GH-116231)

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GH-115978: Disable `*readv()` and `*writev()` on WASI (GH-116228)

Wasmtime doesn't implement these functions in a way to pass test_posix (https://github.com/bytecodealliance/wasmtime/issues/7830).
(cherry picked from commit 5dc8c84d39)

Co-authored-by: Brett Cannon <brett@python.org>
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Miss Islington (bot) 2024-03-02 02:11:41 +01:00 • committed by GitHub
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Misc/NEWS.d/next/Library/2024-03-01-14-22-08.gh-issue-115978.r2ePTo.rst Normal file
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@ -0,0 +1,4 @@
Disable preadv(), readv(), pwritev(), and writev() on WASI.
Under wasmtime for WASI 0.2, these functions don't pass test_posix
(https://github.com/bytecodealliance/wasmtime/issues/7830).

9
Tools/wasm/config.site-wasm32-wasi
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@ -40,3 +40,12 @@ ac_cv_header_netpacket_packet_h=no
# Disable int-conversion for wask-sdk as it triggers an error from version 17.
ac_cv_disable_int_conversion=yes
# preadv(), readv(), pwritev(), and writev() under wasmtime's WASI 0.2 support
# do not use more than the first buffer provided, failing under test_posix.
# Since wasmtime will not be changing this behaviour, disable the functions.
# https://github.com/bytecodealliance/wasmtime/issues/7830
ac_cv_func_preadv=no
ac_cv_func_readv=no
ac_cv_func_pwritev=no
ac_cv_func_writev=no