- AC_SEARCH_LIBS(getaddrinfo, nsl socket)
- AC_SEARCH_LIBS(gethostbyname, [inet nsl])
- AC_REPLACE_FUNCS(getaddrinfo gai_strerror)
+ AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
+ AC_MSG_NOTICE([checking how to do getaddrinfo, freeaddrinfo and getnameinfo])
+
+ AC_SEARCH_LIBS(getaddrinfo, [nsl socket])
+ AC_CHECK_FUNCS(getaddrinfo,, [
+ AC_CACHE_CHECK(for getaddrinfo in ws2tcpip.h and -lws2_32,
+ gl_cv_w32_getaddrinfo, [
+ gl_cv_w32_getaddrinfo=no
+ am_save_LIBS="$LIBS"
+ LIBS="$LIBS -lws2_32"
+ AC_TRY_LINK([
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+], [getaddrinfo(0, 0, 0, 0);], gl_cv_w32_getaddrinfo=yes)
+ LIBS="$am_save_LIBS"])
+ if test "$gl_cv_w32_getaddrinfo" = "yes"; then
+ LIBS="$LIBS -lws2_32"
+ else
+ AC_LIBOBJ(getaddrinfo)
+ fi
+ ])
+
+ # We can't use AC_REPLACE_FUNCS here because gai_strerror may be an
+ # inline function declared in ws2tcpip.h, so we need to get that
+ # header included somehow.
+ AC_CHECK_HEADERS_ONCE(netdb.h)
+ AC_CACHE_CHECK([for gai_strerror (possibly via ws2tcpip.h)],
+ gl_cv_func_gai_strerror, [
+ AC_TRY_LINK([
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_WS2TCPIP_H
+#include <ws2tcpip.h>
+#endif
+], [gai_strerror (0);],
+ [gl_cv_func_gai_strerror=yes],
+ [gl_cv_func_gai_strerror=no])])
+ if test $gl_cv_func_gai_strerror = no; then
+ AC_LIBOBJ(gai_strerror)
+ fi
+