package/boost/0002-fix-uclibc-eventfd.patch

   1 Use eventfd() function with uClibc
   2
   3 The Boost eventfd code either directly makes the eventfd system call
   4 using __NR_eventfd (when __GLIBC_MINOR is less than 8), or otherwise
   5 uses the eventfd() function provided by the C library.
   6
   7 However, since uClibc pretends to be glibc 2.2, the Boost eventfd code
   8 directly uses the system call. While it works fine on most
   9 architectures, it doesn't on ARC since __NR_eventfd is not defined on
  10 this architecture. However, eventfd() is properly implemented.
  11
  12 So, this patch adjusts the logic used by Boost to consider uClibc as a
  13 C library providing the eventfd() function.
  14
  15 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  16
  17 Index: b/boost/asio/detail/impl/eventfd_select_interrupter.ipp
  18 ===================================================================
  19 --- a/boost/asio/detail/impl/eventfd_select_interrupter.ipp
  20 +++ b/boost/asio/detail/impl/eventfd_select_interrupter.ipp
  21 @@ -23,7 +23,7 @@
  22  #include <sys/stat.h>
  23  #include <sys/types.h>
  24  #include <fcntl.h>
  25 -#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
  26 +#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
  27  # include <asm/unistd.h>
  28  #else // __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
  29  # include <sys/eventfd.h>
  30 @@ -46,7 +46,7 @@
  31
  32  void eventfd_select_interrupter::open_descriptors()
  33  {
  34 -#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
  35 +#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8 && !defined(__UCLIBC__)
  36    write_descriptor_ = read_descriptor_ = syscall(__NR_eventfd, 0);
  37    if (read_descriptor_ != -1)
  38    {