+++ /dev/null
-# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_have_epoll.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# AX_HAVE_EPOLL([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
-# AX_HAVE_EPOLL_PWAIT([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
-#
-# DESCRIPTION
-#
-# This macro determines whether the system supports the epoll I/O event
-# interface. A neat usage example would be:
-#
-# AX_HAVE_EPOLL(
-# [AX_CONFIG_FEATURE_ENABLE(epoll)],
-# [AX_CONFIG_FEATURE_DISABLE(epoll)])
-# AX_CONFIG_FEATURE(
-# [epoll], [This platform supports epoll(7)],
-# [HAVE_EPOLL], [This platform supports epoll(7).])
-#
-# The epoll interface was added to the Linux kernel in version 2.5.45, and
-# the macro verifies that a kernel newer than this is installed. This
-# check is somewhat unreliable if <linux/version.h> doesn't match the
-# running kernel, but it is necessary regardless, because glibc comes with
-# stubs for the epoll_create(), epoll_wait(), etc. that allow programs to
-# compile and link even if the kernel is too old; the problem would then
-# be detected only at runtime.
-#
-# Linux kernel version 2.6.19 adds the epoll_pwait() call in addition to
-# epoll_wait(). The availability of that function can be tested with the
-# second macro. Generally speaking, it is safe to assume that
-# AX_HAVE_EPOLL would succeed if AX_HAVE_EPOLL_PWAIT has, but not the
-# other way round.
-#
-# LICENSE
-#
-# Copyright (c) 2008 Peter Simons <simons@cryp.to>
-#
-# Copying and distribution of this file, with or without modification, are
-# permitted in any medium without royalty provided the copyright notice
-# and this notice are preserved. This file is offered as-is, without any
-# warranty.
-
-#serial 10
-
-AC_DEFUN([AX_HAVE_EPOLL], [dnl
- ax_have_epoll_cppflags="${CPPFLAGS}"
- AC_CHECK_HEADER([linux/version.h], [CPPFLAGS="${CPPFLAGS} -DHAVE_LINUX_VERSION_H"])
- AC_MSG_CHECKING([for Linux epoll(7) interface])
- AC_CACHE_VAL([ax_cv_have_epoll], [dnl
- AC_LINK_IFELSE([dnl
- AC_LANG_PROGRAM([dnl
-#include <sys/epoll.h>
-#ifdef HAVE_LINUX_VERSION_H
-# include <linux/version.h>
-# if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,45)
-# error linux kernel version is too old to have epoll
-# endif
-#endif
-], [dnl
-int fd, rc;
-struct epoll_event ev;
-fd = epoll_create(128);
-rc = epoll_wait(fd, &ev, 1, 0);])],
- [ax_cv_have_epoll=yes],
- [ax_cv_have_epoll=no])])
- CPPFLAGS="${ax_have_epoll_cppflags}"
- AS_IF([test "${ax_cv_have_epoll}" = "yes"],
- [AC_MSG_RESULT([yes])
-$1],[AC_MSG_RESULT([no])
-$2])
-])dnl
-
-AC_DEFUN([AX_HAVE_EPOLL_PWAIT], [dnl
- ax_have_epoll_cppflags="${CPPFLAGS}"
- AC_CHECK_HEADER([linux/version.h],
- [CPPFLAGS="${CPPFLAGS} -DHAVE_LINUX_VERSION_H"])
- AC_MSG_CHECKING([for Linux epoll(7) interface with signals extension])
- AC_CACHE_VAL([ax_cv_have_epoll_pwait], [dnl
- AC_LINK_IFELSE([dnl
- AC_LANG_PROGRAM([dnl
-#ifdef HAVE_LINUX_VERSION_H
-# include <linux/version.h>
-# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
-# error linux kernel version is too old to have epoll_pwait
-# endif
-#endif
-#include <sys/epoll.h>
-#include <signal.h>
-], [dnl
-int fd, rc;
-struct epoll_event ev;
-fd = epoll_create(128);
-rc = epoll_wait(fd, &ev, 1, 0);
-rc = epoll_pwait(fd, &ev, 1, 0, (sigset_t const *)(0));])],
- [ax_cv_have_epoll_pwait=yes],
- [ax_cv_have_epoll_pwait=no])])
- CPPFLAGS="${ax_have_epoll_cppflags}"
- AS_IF([test "${ax_cv_have_epoll_pwait}" = "yes"],
- [AC_MSG_RESULT([yes])
-$1],[AC_MSG_RESULT([no])
-$2])
-])dnl
-