| 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) |
| { |
