https://github.com/gssapi/gssproxy/commit/91c87d24bf844875701957f01552b674cced2ca8

From 91c87d24bf844875701957f01552b674cced2ca8 Mon Sep 17 00:00:00 2001
From: Simo Sorce <simo@redhat.com>
Date: Mon, 10 Feb 2025 14:55:37 -0500
Subject: [PATCH] Change declaration of function map

Newer compilers complain if funciton is declared w/o arguments,
so we redeclare the xdrptoc_t as xdrfn and give it proper arguments

Signed-off-by: Simo Sorce <simo@redhat.com>
---
 rpcgen/gp_xdr.h         | 4 ++++
 src/client/gpm_common.c | 8 ++++++--
 src/gp_rpc_process.c    | 8 ++++++--
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/rpcgen/gp_xdr.h b/rpcgen/gp_xdr.h
index bbd747d0a..e7a476f3d 100644
--- a/rpcgen/gp_xdr.h
+++ b/rpcgen/gp_xdr.h
@@ -5,6 +5,10 @@
 
 #include "gssrpc/rpc.h"
 
+/* Equivalent to xdrptoc_t but with proper arguments so that modern
+ * compilers do not complain */
+typedef int xdrfn(XDR *, void *);
+
 #define xdr_u_quad_t gp_xdr_uint64_t
 
 bool_t gp_xdr_uint64_t(XDR *xdrs, uint64_t *objp);
diff --git a/src/client/gpm_common.c b/src/client/gpm_common.c
index 22a74ab48..2c0925d05 100644
--- a/src/client/gpm_common.c
+++ b/src/client/gpm_common.c
@@ -676,6 +676,8 @@ int gpm_make_call(int proc, union gp_rpc_arg *arg, union gp_rpc_res *res)
     gp_rpc_msg msg;
     XDR xdr_call_ctx = {0};
     XDR xdr_reply_ctx = {0};
+    xdrfn *arg_fn;
+    xdrfn *res_fn;
     char *send_buffer = NULL;
     char *recv_buffer = NULL;
     uint32_t send_length;
@@ -726,7 +728,8 @@ int gpm_make_call(int proc, union gp_rpc_arg *arg, union gp_rpc_res *res)
     }
 
     /* encode data */
-    xdrok = gpm_xdr_set[proc].arg_fn(&xdr_call_ctx, (char *)arg);
+    arg_fn = gpm_xdr_set[proc].arg_fn;
+    xdrok = arg_fn(&xdr_call_ctx, arg);
     if (!xdrok) {
         ret = EINVAL;
         goto done;
@@ -765,7 +768,8 @@ int gpm_make_call(int proc, union gp_rpc_arg *arg, union gp_rpc_res *res)
     }
 
     /* decode answer */
-    xdrok = gpm_xdr_set[proc].res_fn(&xdr_reply_ctx, (char *)res);
+    res_fn = gpm_xdr_set[proc].res_fn;
+    xdrok = res_fn(&xdr_reply_ctx, res);
     if (!xdrok) {
         ret = EINVAL;
     }
diff --git a/src/gp_rpc_process.c b/src/gp_rpc_process.c
index eaffc55eb..1ac7c167f 100644
--- a/src/gp_rpc_process.c
+++ b/src/gp_rpc_process.c
@@ -196,6 +196,7 @@ static int gp_rpc_decode_call(XDR *xdr_call_ctx,
                               gp_rpc_accept_status *acc,
                               gp_rpc_reject_status *rej)
 {
+    xdrfn *arg_fn;
     bool xdrok;
     int ret;
 
@@ -204,7 +205,8 @@ static int gp_rpc_decode_call(XDR *xdr_call_ctx,
         return ret;
     }
 
-    xdrok = gp_xdr_set[*proc].arg_fn(xdr_call_ctx, (char *)arg);
+    arg_fn = gp_xdr_set[*proc].arg_fn;
+    xdrok = arg_fn(xdr_call_ctx, arg);
     if (!xdrok) {
         *acc = GP_RPC_GARBAGE_ARGS;
         return EINVAL;
@@ -283,6 +285,7 @@ static int gp_rpc_encode_reply(XDR *xdr_reply_ctx,
                                gp_rpc_accept_status acc,
                                gp_rpc_reject_status rej)
 {
+    xdrfn *res_fn;
     bool xdrok;
     int ret;
 
@@ -291,7 +294,8 @@ static int gp_rpc_encode_reply(XDR *xdr_reply_ctx,
         return ret;
     }
 
-    xdrok = gp_xdr_set[proc].res_fn(xdr_reply_ctx, (char *)res);
+    res_fn = gp_xdr_set[proc].res_fn;
+    xdrok = res_fn(xdr_reply_ctx, res);
 
     if (!xdrok) {
         return gp_rpc_encode_reply_header(xdr_reply_ctx, xid, EINVAL,