From 75ab1ba77467cab272ee8302ca4e9d1be306d2f6 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Fri, 17 Feb 2012 14:13:10 -0800
Subject: [PATCH] linux: uclibc <0.9.32 doesn't have <ifaddrs.h>

uclibc didn't provide ifaddrs.h before version 0.9.32 It explicitly didn't
install it because (quoting) "the corresponding functionality is disabled". So,
fix libuv on uclibc < 0.9.32 by returning ENOSYS for uv_interface_addresses()
---
 src/unix/linux.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/unix/linux.c b/src/unix/linux.c
index 2f04cb8d..8986eef9 100644
--- a/src/unix/linux.c
+++ b/src/unix/linux.c
@@ -28,7 +28,6 @@
 #include <assert.h>
 #include <errno.h>
 
-#include <ifaddrs.h>
 #include <net/if.h>
 #include <sys/param.h>
 #include <sys/sysinfo.h>
@@ -36,6 +35,16 @@
 #include <fcntl.h>
 #include <time.h>
 
+#define HAVE_IFADDRS_H 1
+#ifdef __UCLIBC__
+# if __UCLIBC_MAJOR__ < 0 || __UCLIBC_MINOR__ < 9 || __UCLIBC_SUBLEVEL__ < 32
+#  undef HAVE_IFADDRS_H
+# endif
+#endif
+#ifdef HAVE_IFADDRS_H
+# include <ifaddrs.h>
+#endif
+
 #undef NANOSEC
 #define NANOSEC 1000000000
 
@@ -457,6 +466,9 @@ void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count) {
 
 uv_err_t uv_interface_addresses(uv_interface_address_t** addresses,
   int* count) {
+#ifndef HAVE_IFADDRS_H
+  return uv__new_artificial_error(UV_ENOSYS);
+#else
   struct ifaddrs *addrs, *ent;
   char ip[INET6_ADDRSTRLEN];
   uv_interface_address_t* address;
@@ -520,6 +532,7 @@ uv_err_t uv_interface_addresses(uv_interface_address_t** addresses,
   freeifaddrs(addrs);
 
   return uv_ok_;
+#endif
 }