From f3b6cdadf19269be25645a102fef89baaf289769 Mon Sep 17 00:00:00 2001
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From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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Date: Sat, 30 Nov 2019 12:18:51 -0800
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Subject: [PATCH] fix uclibc eventfd
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Use eventfd() function with uClibc
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The Boost eventfd code either directly makes the eventfd system call
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using __NR_eventfd (when __GLIBC_MINOR is less than 8), or otherwise
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uses the eventfd() function provided by the C library.
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However, since uClibc pretends to be glibc 2.2, the Boost eventfd code
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directly uses the system call. While it works fine on most
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architectures, it doesn't on ARC since __NR_eventfd is not defined on
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this architecture. However, eventfd() is properly implemented.
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So, this patch adjusts the logic used by Boost to consider uClibc as a
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C library providing the eventfd() function.
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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[Aduskett@gmail.com: Modified to work with the standalone package.]
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Signed-off-by: Adam Duskett <Aduskett@gmail.com>
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---
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asio/include/asio/detail/impl/eventfd_select_interrupter.ipp | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/asio/include/asio/detail/impl/eventfd_select_interrupter.ipp b/asio/include/asio/detail/impl/eventfd_select_interrupter.ipp
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index 9ff9bc8..04e3477 100644
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--- a/asio/include/asio/detail/impl/eventfd_select_interrupter.ipp
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+++ b/asio/include/asio/detail/impl/eventfd_select_interrupter.ipp
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@@ -23,7 +23,7 @@
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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-#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
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+#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
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# include <asm/unistd.h>
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#else // __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
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# include <sys/eventfd.h>
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@@ -45,7 +45,7 @@ eventfd_select_interrupter::eventfd_select_interrupter()
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void eventfd_select_interrupter::open_descriptors()
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{
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-#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
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+#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
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write_descriptor_ = read_descriptor_ = syscall(__NR_eventfd, 0);
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if (read_descriptor_ != -1)
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{
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--
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2.23.0
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