Build with libtirpc on all architectures because glibc no longer provides
SunRPC support.

diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -23635,10 +23635,13 @@
   *-pc-cygwin*)
     LIBS="$LIBS -ltirpc"
     CPPFLAGS="$CPPFLAGS -I/usr/include/tirpc"  ;;
+  *-linux-gnu)
+    LIBS="$LIBS -ltirpc"
+    CPPFLAGS="$CPPFLAGS"  ;;
   *) ;;
 esac
 
-if test "X$BUILD_XDR" != "Xyes"; then
+if test "X$BUILD_XDR" = "Xyes"; then
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -23693,9 +23696,9 @@
   ## but we need to make sure that it is present on the system. Do that here,
   ## The SunRPC of the glibc has been replaced by a TI-RPC (Transport Independent RPC) library for IPv6 support
   case "$host" in
-    *-pc-cygwin*)
+    *)
       HAVE_RPC="yes"
-      ac_fn_c_check_header_mongrel "$LINENO" "rpc.h" "ac_cv_header_rpc_h" "$ac_includes_default"
+      ac_fn_c_check_header_mongrel "$LINENO" "rpc/rpc.h" "ac_cv_header_rpc_h" "$ac_includes_default"
 if test "x$ac_cv_header_rpc_h" = xyes; then :
   :
 else
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<tr><td><span title='2022-01-24 15:39:16 +0100'>2022-01-24</span></td><td><a href='/guix/commit/gnu/packages/patches/zig-use-system-paths.patch?id=6504587168f78720198bdb518d63608af95f312c'>gnu: zig: Update to 0.9.0</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/zig-disable-libc-note-test.patch: Move patch changes to new file.
* gnu/packages/patches/zig-use-system-paths.patch: Update line numbers.
* gnu/packages/zig.scm: Update to 0.9.0

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Calum Irwin</td></tr>
<tr><td><span title='2021-10-31 09:02:01 +0100'>2021-10-31</span></td><td><a href='/guix/commit/gnu/packages/patches/zig-use-system-paths.patch?id=9f2c5e901e988b575d487629976d2d14be4ed61d'>gnu: Add zig.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/zig-disable-libc-note-test.patch,
gnu/packages/patches/zig-use-system-paths.patch: New files.
* gnu/packages/zig.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES, dist_patch_DATA): Adjust accordingly.
</span></span></td><td>Liliana Marie Prikler</td></tr>