39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
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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@free-electrons.com>
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Index: b/boost/asio/detail/impl/eventfd_select_interrupter.ipp
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===================================================================
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--- a/boost/asio/detail/impl/eventfd_select_interrupter.ipp
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+++ b/boost/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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@@ -46,7 +46,7 @@
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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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