package/acpid: fix musl build problem

Fixes http://autobuild.buildroot.net/results/7e6/7e60af535dd4177afdc4cb7b92e9abf27c3fba07

acpid uses TEMP_FAILURE_RETRY which is a glibc feature.
patch adds this macro if it is not present and __GLIBC__
is undefined.

Patch submitted upstream.

Signed-off-by: Brendan Heading <brendanheading@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/acpid/0003-support-for-non-glibc-libcs.patch

@@ -0,0 +1,184 @@
+From a3dac1c3cee169e52c7d644dd565235a1cd833e3 Mon Sep 17 00:00:00 2001
+From: Brendan Heading <brendanheading@gmail.com>
+Date: Wed, 22 Jul 2015 23:10:11 +0100
+Subject: [PATCH] support for non-glibc libcs
+
+Added a TEMP_FAILURE_RETRY macro. This is a glibcism provided by
+glibc and uclibc, but missing from musl (& possibly other libcs).
+
+Upstream-status: submitted (see https://sourceforge.net/p/acpid2/tickets/7/)
+---
+ acpi_listen.c         |  2 ++
+ acpid.c               |  1 +
+ event.c               |  2 ++
+ input_layer.c         |  1 +
+ kacpimon/libnetlink.h |  2 ++
+ libc_compat.h         | 40 ++++++++++++++++++++++++++++++++++++++++
+ libnetlink.c          |  2 ++
+ netlink.c             |  1 +
+ proc.c                |  1 +
+ ud_socket.c           |  1 +
+ 10 files changed, 53 insertions(+)
+ create mode 100644 libc_compat.h
+
+diff --git a/acpi_listen.c b/acpi_listen.c
+index d0bc175..839e4f9 100644
+--- a/acpi_listen.c
++++ b/acpi_listen.c
+@@ -39,6 +39,8 @@
+ #include "acpid.h"
+ #include "ud_socket.h"
+ 
++#include "libc_compat.h"
++
+ static int handle_cmdline(int *argc, char ***argv);
+ static char *read_line(int fd);
+ 
+diff --git a/acpid.c b/acpid.c
+index 23f1e58..8555c82 100644
+--- a/acpid.c
++++ b/acpid.c
+@@ -41,6 +41,7 @@
+ #include "input_layer.h"
+ #include "inotify_handler.h"
+ #include "netlink.h"
++#include "libc_compat.h"
+ 
+ static int handle_cmdline(int *argc, char ***argv);
+ static void close_fds(void);
+diff --git a/event.c b/event.c
+index 324078f..3b069a2 100644
+--- a/event.c
++++ b/event.c
+@@ -39,6 +39,8 @@
+ #include "log.h"
+ #include "sock.h"
+ #include "ud_socket.h"
++#include "libc_compat.h"
++
+ #include "event.h"
+ /*
+  * What is a rule?  It's polymorphic, pretty much.
+diff --git a/input_layer.c b/input_layer.c
+index 9aa19c6..cbf8085 100644
+--- a/input_layer.c
++++ b/input_layer.c
+@@ -42,6 +42,7 @@
+ #include "log.h"
+ #include "connection_list.h"
+ #include "event.h"
++#include "libc_compat.h"
+ 
+ #include "input_layer.h"
+ 
+diff --git a/kacpimon/libnetlink.h b/kacpimon/libnetlink.h
+index 6185cbc..0c61896 100644
+--- a/kacpimon/libnetlink.h
++++ b/kacpimon/libnetlink.h
+@@ -7,6 +7,8 @@
+ #include <linux/netlink.h>
+ #include <linux/rtnetlink.h>
+ 
++#include "libc_compat.h"
++
+ struct rtnl_handle
+ {
+ 	int			fd;
+diff --git a/libc_compat.h b/libc_compat.h
+new file mode 100644
+index 0000000..39f2336
+--- /dev/null
++++ b/libc_compat.h
+@@ -0,0 +1,40 @@
++/*
++ *  libc_compat.h - implement defs/macros missing from some libcs
++ *
++ *  Copyright (C) 1999-2000 Andrew Henroid
++ *  Copyright (C) 2001 Sun Microsystems
++ *  Portions Copyright (C) 2004 Tim Hockin (thockin@hockin.org)
++ *
++ *  This program is free software; you can redistribute it and/or modify
++ *  it under the terms of the GNU General Public License as published by
++ *  the Free Software Foundation; either version 2 of the License, or
++ *  (at your option) any later version.
++ *
++ *  This program is distributed in the hope that it will be useful,
++ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *  GNU General Public License for more details.
++ *
++ *  You should have received a copy of the GNU General Public License
++ *  along with this program; if not, write to the Free Software
++ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++
++#ifndef LIBC_COMPAT_H__
++#define LIBC_COMPAT_H__
++
++/* Evaluate EXPRESSION, and repeat as long as it returns -1 with `errno'
++   set to EINTR. This macro is present on glibc/uclibc but may not be in other cases.  */
++
++#ifndef ____GLIBC__
++#ifndef TEMP_FAILURE_RETRY
++#define TEMP_FAILURE_RETRY(expression) \
++  (__extension__                                                             \
++    ({ long int __result;                                                    \
++       do __result = (long int) (expression);                                \
++       while (__result == -1L && errno == EINTR);                            \
++       __result; }))
++#endif
++#endif /* __GLIBC__ */
++
++#endif /* LIBC_COMPAT_H__ */
+diff --git a/libnetlink.c b/libnetlink.c
+index e61d417..cc7aedc 100644
+--- a/libnetlink.c
++++ b/libnetlink.c
+@@ -24,6 +24,8 @@
+ #include <time.h>
+ #include <sys/uio.h>
+ 
++#include "libc_compat.h"
++
+ #include "libnetlink.h"
+ 
+ void rtnl_close(struct rtnl_handle *rth)
+diff --git a/netlink.c b/netlink.c
+index c64e878..27e3536 100644
+--- a/netlink.c
++++ b/netlink.c
+@@ -41,6 +41,7 @@
+ #include "libnetlink.h"
+ #include "genetlink.h"
+ #include "acpi_genetlink.h"
++#include "libc_compat.h"
+ 
+ #include "acpi_ids.h"
+ #include "connection_list.h"
+diff --git a/proc.c b/proc.c
+index 5bb8fa2..f96b913 100644
+--- a/proc.c
++++ b/proc.c
+@@ -31,6 +31,7 @@
+ #include "log.h"
+ #include "event.h"
+ #include "connection_list.h"
++#include "libc_compat.h"
+ 
+ #include "proc.h"
+ 
+diff --git a/ud_socket.c b/ud_socket.c
+index 2790686..1790917 100644
+--- a/ud_socket.c
++++ b/ud_socket.c
+@@ -21,6 +21,7 @@
+ #include "acpid.h"
+ #include "log.h"
+ #include "ud_socket.h"
++#include "libc_compat.h"
+ 
+ int
+ ud_create_socket(const char *name, mode_t socketmode)
+-- 
+2.4.3
+