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 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 #include #include -#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 +#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__) # include #else // __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 # include @@ -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) {