X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsys_socket_h.m4;h=85a0ace8ad9f3700c9ef98f1b9ddfe7466bf3659;hb=0a3f7af426469ab51370585e1a3afba66ff24b57;hp=9d2d92c5a2718a1e443d034f2dd5b777f980cb4e;hpb=719ff2a7c65cd5ffd255c30ea0fe59fe7bff6ed8;p=gnulib.git

diff --git a/m4/sys_socket_h.m4 b/m4/sys_socket_h.m4
index 9d2d92c5a..85a0ace8a 100644
--- a/m4/sys_socket_h.m4
+++ b/m4/sys_socket_h.m4
@@ -71,8 +71,8 @@ AC_DEFUN([gl_HEADER_SYS_SOCKET],
 # Sets and substitutes HAVE_WINSOCK2_H.
 AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
 [
-  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
+  m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
+  m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
   AC_CHECK_HEADERS_ONCE([sys/socket.h])
   if test $ac_cv_header_sys_socket_h != yes; then
     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make