WIN32: fix calling conventions for 32-bit builds

On 32-bit Windows Intel builds the __cdecl and __stdcall calling
conventions are different so labeling the functions that are
exported or assigned to function pointers matters.

Change-Id: I03b6f34baeb9ffb2e683fd979f12f27a5078a4da

lib/kadm5/chpass_s.c

@@ -46,7 +46,7 @@ struct chpass_principal_hook_ctx {
     const char *password;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 chpass_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/create_s.c

@@ -111,7 +111,7 @@ struct create_principal_hook_ctx {
     const char *password;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 create_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/delete_s.c

@@ -42,7 +42,7 @@ struct delete_principal_hook_ctx {
     krb5_const_principal princ;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 delete_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/modify_s.c

@@ -43,7 +43,7 @@ struct modify_principal_hook_ctx {
     uint32_t mask;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 modify_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/prune_s.c

@@ -42,7 +42,7 @@ struct prune_principal_hook_ctx {
     int kvno;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 prune_principal_hook_cb(krb5_context context,
 			const void *hook,
 			void *hookctx,

lib/kadm5/randkey_s.c

@@ -42,7 +42,7 @@ struct randkey_principal_hook_ctx {
     krb5_const_principal princ;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 randkey_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/rename_s.c

@@ -42,7 +42,7 @@ struct rename_principal_hook_ctx {
     krb5_const_principal source, target;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 rename_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,

lib/kadm5/sample_hook.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, AuriStor, Inc.
+ * Copyright (c) 2018-2019, AuriStor, Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -261,7 +261,7 @@ kadm5_hook_plugin_load(krb5_context context,
 		       size_t *num_hooks,
 		       const kadm5_hook_ftable *const **hooks);
 
-static uintptr_t
+static uintptr_t KRB5_LIB_CALL
 sample_hook_get_instance(const char *libname)
 {
     if (strcmp(libname, "kadm5") == 0)

lib/kadm5/server_hooks.c

@@ -83,7 +83,7 @@ _kadm5_s_free_hooks(kadm5_server_context *ctx)
     _krb5_unload_plugins(ctx->context, "kadm5");
 }
 
-uintptr_t
+uintptr_t KRB5_LIB_CALL
 kadm5_get_instance(const char *libname)
 {
     static const char *instance = "libkadm5";

lib/kadm5/setkey3_s.c

@@ -45,7 +45,7 @@ struct setkey_principal_hook_ctx {
     krb5_keyblock *keys;
 };
 
-static krb5_error_code
+static krb5_error_code KRB5_LIB_CALL
 setkey_principal_hook_cb(krb5_context context,
 			 const void *hook,
 			 void *hookctx,