From 303161777d617ffcf8c9cf76a7b6e84bf3655295 Mon Sep 17 00:00:00 2001
From: Mark Ellzey <ellzey@strcpy.net>
Date: Tue, 28 Jun 2016 10:37:24 -0700
Subject: [PATCH] [#372] check for errno.h

---
 CMakeLists.txt        | 1 +
 configure.ac          | 1 +
 event-config.h.cmake  | 4 ++++
 include/event2/util.h | 3 +++
 4 files changed, 9 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 98b669f4..86ac97af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -288,6 +288,7 @@ CHECK_INCLUDE_FILE(sys/wait.h EVENT__HAVE_SYS_WAIT_H)
 CHECK_INCLUDE_FILE(sys/resource.h EVENT__HAVE_SYS_RESOURCE_H)
 CHECK_INCLUDE_FILE(sys/sysctl.h EVENT__HAVE_SYS_SYSCTL_H)
 CHECK_INCLUDE_FILE(sys/timerfd.h EVENT__HAVE_SYS_TIMERFD_H)
+CHECK_INCLUDE_FILE(errno.h EVENT__HAVE_ERRNO_H)
 
 
 CHECK_FUNCTION_EXISTS_EX(epoll_create EVENT__HAVE_EPOLL)
diff --git a/configure.ac b/configure.ac
index 215c853e..904cd1aa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -243,6 +243,7 @@ AC_CHECK_HEADERS([ \
   sys/timerfd.h \
   sys/uio.h \
   sys/wait.h \
+  errno.h \
 ])
 
 AC_CHECK_HEADERS(sys/sysctl.h, [], [], [
diff --git a/event-config.h.cmake b/event-config.h.cmake
index 76e0d1f9..b47a7c4c 100644
--- a/event-config.h.cmake
+++ b/event-config.h.cmake
@@ -382,6 +382,9 @@
 /* Define to 1 if you have the <sys/wait.h> header file. */
 #cmakedefine EVENT__HAVE_SYS_WAIT_H
 
+/* Define to 1 if you have the <errno.h> header file. */
+#cmakedefine EVENT__HAVE_ERRNO_H
+
 /* Define if TAILQ_FOREACH is defined in <sys/queue.h> */
 #cmakedefine EVENT__HAVE_TAILQFOREACH
 
@@ -394,6 +397,7 @@
 /* Define if timercmp is defined in <sys/time.h> */
 #cmakedefine EVENT__HAVE_TIMERCMP
 
+
 /* Define to 1 if you have the `timerfd_create' function. */
 #cmakedefine EVENT__HAVE_TIMERFD_CREATE
 
diff --git a/include/event2/util.h b/include/event2/util.h
index 3936786e..2c43e30e 100644
--- a/include/event2/util.h
+++ b/include/event2/util.h
@@ -71,6 +71,9 @@ extern "C" {
 #include <ws2tcpip.h>
 #endif
 #else
+#ifdef EVENT__HAVE_ERRNO_H
+#include <errno.h>
+#endif
 #include <sys/socket.h>
 #endif
 
-- 
2.40.0