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- Use eventfd() function with uClibc
- The Boost eventfd code either directly makes the eventfd system call
- using __NR_eventfd (when __GLIBC_MINOR is less than 8), or otherwise
- uses the eventfd() function provided by the C library.
- However, since uClibc pretends to be glibc 2.2, the Boost eventfd code
- directly uses the system call. While it works fine on most
- architectures, it doesn't on ARC since __NR_eventfd is not defined on
- this architecture. However, eventfd() is properly implemented.
- So, this patch adjusts the logic used by Boost to consider uClibc as a
- C library providing the eventfd() function.
- Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
- Index: b/boost/asio/detail/impl/eventfd_select_interrupter.ipp
- ===================================================================
- --- a/boost/asio/detail/impl/eventfd_select_interrupter.ipp
- +++ b/boost/asio/detail/impl/eventfd_select_interrupter.ipp
- @@ -23,7 +23,7 @@
- #include <sys/stat.h>
- #include <sys/types.h>
- #include <fcntl.h>
- -#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
- +#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
- # include <asm/unistd.h>
- #else // __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
- # include <sys/eventfd.h>
- @@ -46,7 +46,7 @@
-
- void eventfd_select_interrupter::open_descriptors()
- {
- -#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
- +#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
- write_descriptor_ = read_descriptor_ = syscall(__NR_eventfd, 0);
- if (read_descriptor_ != -1)
- {
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