Check if program_invocation_name and

[gnulib.git] / m4 / getaddrinfo.m4

diff --git a/m4/getaddrinfo.m4 b/m4/getaddrinfo.m4
index 07f7896..b3b7b07 100644 (file)
--- a/m4/getaddrinfo.m4
+++ b/m4/getaddrinfo.m4
@@ -1,4 +1,4 @@
-# getaddrinfo.m4 serial 6
+# getaddrinfo.m4 serial 7
 dnl Copyright (C) 2004, 2005 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -18,5 +18,19 @@ AC_DEFUN([gl_PREREQ_GETADDRINFO], [
   AC_REQUIRE([gl_C_RESTRICT])
   AC_REQUIRE([gl_SOCKET_FAMILIES])
   AC_REQUIRE([AC_C_INLINE])
-  AC_CHECK_HEADERS_ONCE([netinet/in.h])
+  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_CHECK_HEADERS_ONCE(netinet/in.h)
+  AC_CHECK_DECLS([getaddrinfo, freeaddrinfo, gai_strerror],,,[
+  /* sys/types.h is not needed according to POSIX, but the
+     sys/socket.h in i386-unknown-freebsd4.10 and
+     powerpc-apple-darwin5.5 required it. */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+])
+  AC_CHECK_TYPES([struct addrinfo],,,[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+])
 ])