[glibc/zack/no-nested-includes] fixup for sys/un.h: don't include string.h

[Zack Weinberg <zack at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c52e60d2d7fd286c65d76c67eec04ae6e37775b1

commit c52e60d2d7fd286c65d76c67eec04ae6e37775b1
Author: Zack Weinberg <zackw@panix.com>
Date:   Sun May 26 11:02:27 2019 -0400

    fixup for sys/un.h: don't include string.h
    
    1) For a valid prototype of strlen, sys/un.h must define size_t.
    2) Some old RPC code was relying on sys/un.h to provide all of string.h.
    
    	* socket/sys/un.h: Include stddef.h for size_t.
    	* nis/nis_domain_of.c, nis/yp_xdr.c, sunrpc/svc.c: Include string.h.

Diff:
---
 nis/nis_domain_of.c | 1 +
 nis/yp_xdr.c        | 1 +
 socket/sys/un.h     | 3 +++
 sunrpc/svc.c        | 1 +
 4 files changed, 6 insertions(+)

diff --git a/nis/nis_domain_of.c b/nis/nis_domain_of.c
index 44c5b04..da26df3 100644
--- a/nis/nis_domain_of.c
+++ b/nis/nis_domain_of.c
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <rpcsvc/nis.h>
+#include <string.h>
 #include <shlib-compat.h>
 
 nis_name
diff --git a/nis/yp_xdr.c b/nis/yp_xdr.c
index 3b57673..4c9f1d2 100644
--- a/nis/yp_xdr.c
+++ b/nis/yp_xdr.c
@@ -31,6 +31,7 @@
 
 #include <rpcsvc/yp.h>
 #include <rpcsvc/ypclnt.h>
+#include <string.h>
 #include <shlib-compat.h>
 
 /* The NIS v2 protocol suggests 1024 bytes as a maximum length of all fields.
diff --git a/socket/sys/un.h b/socket/sys/un.h
index 8097436..104d28f 100644
--- a/socket/sys/un.h
+++ b/socket/sys/un.h
@@ -34,6 +34,9 @@ struct sockaddr_un
 
 
 #ifdef __USE_MISC
+#define __need_size_t
+#include <stddef.h>
+
 extern size_t strlen (const char *__s)
      __THROW __attribute_pure__ __nonnull ((1));
 
diff --git a/sunrpc/svc.c b/sunrpc/svc.c
index 95ecfbb..8042019 100644
--- a/sunrpc/svc.c
+++ b/sunrpc/svc.c
@@ -53,6 +53,7 @@
  */
 
 #include <errno.h>
+#include <string.h>
 #include <unistd.h>
 #include <rpc/rpc.h>
 #include <rpc/svc.h>