Add cmake check for getifaddrs.

cmake/os/WindowsCache.cmake

@@ -76,6 +76,7 @@ SET(HAVE_FSYNC CACHE  INTERNAL "")
 SET(HAVE_FTIME 1 CACHE  INTERNAL "")
 SET(HAVE_FTRUNCATE CACHE  INTERNAL "")
 SET(HAVE_GETADDRINFO 1 CACHE  INTERNAL "")
+SET(HAVE_GETIFADDRS CACHE  INTERNAL "")
 SET(HAVE_GETCWD 1 CACHE  INTERNAL "")
 SET(HAVE_GETHOSTBYADDR_R CACHE  INTERNAL "")
 SET(HAVE_GETHRTIME CACHE  INTERNAL "")

config.h.cmake

@@ -163,6 +163,7 @@
 #cmakedefine HAVE_FSYNC 1
 #cmakedefine HAVE_FTIME 1
 #cmakedefine HAVE_GETADDRINFO 1
+#cmakedefine HAVE_GETIFADDRS 1
 #cmakedefine HAVE_GETCWD 1
 #cmakedefine HAVE_GETHOSTBYADDR_R 1
 #cmakedefine HAVE_GETHRTIME 1

configure.cmake

@@ -360,6 +360,7 @@ CHECK_FUNCTION_EXISTS (getpassphrase HAVE_GETPASSPHRASE)
 CHECK_FUNCTION_EXISTS (getpwnam HAVE_GETPWNAM)
 CHECK_FUNCTION_EXISTS (getpwuid HAVE_GETPWUID)
 CHECK_FUNCTION_EXISTS (getrlimit HAVE_GETRLIMIT)
+CHECK_FUNCTION_EXISTS (getifaddrs HAVE_GETIFADDRS)
 CHECK_FUNCTION_EXISTS (getrusage HAVE_GETRUSAGE)
 CHECK_FUNCTION_EXISTS (getwd HAVE_GETWD)
 CHECK_FUNCTION_EXISTS (gmtime_r HAVE_GMTIME_R)