tree f65f44725ff30870793f22197a31051fb95eb5ae
parent 0140cca9bc0fad1108c7ed369376ac71cc4bfecf
author Ian Lance Taylor <iant@golang.org> 1664219033 -0400
committer Ian Lance Taylor <iant@golang.org> 1664296206 +0000

runtime: portable access to sigev_notify_thread_id

Previously, libgo relied on the _sigev_un implementation-specific
field in struct sigevent, which is only available on glibc.
This patch uses the sigev_notify_thread_id macro instead which is
mandated by timer_create(2). In theory, this should work with any libc
implementation for Linux. Unfortunately, there is an open glibc bug
as glibc does not define this macro. For this reason, a glibc-specific
workaround is required. Other libcs (such as musl) define the macro
and don't require the workaround.

See https://sourceware.org/bugzilla/show_bug.cgi?id=27417

This makes libgo compatible with musl libc.

Based on patch by Sören Tempel.

Change-Id: I0924a53d5212730ebc395ecf9199f85967be8cc6
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/434755
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>