gnu: slim: Fix build with gcc-14.

* gnu/packages/patches/slim-gcc-14.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/display-managers.scm (slim)[source]: Use it.

Change-Id: Ie5bd02ad047f5b6d1c185a53c2c0b1456ef941a0

gnu/local.mk

@@ -2295,6 +2295,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/sharutils-CVE-2018-1000097.patch		\
   %D%/packages/patches/sipwitch-fix-build-with-exosip5.patch	\
   %D%/packages/patches/slim-config.patch			\
+  %D%/packages/patches/slim-gcc-14.patch			\
   %D%/packages/patches/slim-login.patch				\
   %D%/packages/patches/slim-display.patch			\
   %D%/packages/patches/slurm-23-salloc-fallback-shell.patch	\

gnu/packages/display-managers.scm

@@ -13,6 +13,7 @@
 ;;; Copyright © 2021-2023 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2021 Petr Hodina <phodina@protonmail.com>
 ;;; Copyright © 2022, 2023 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2024 Janneke Nieuwenhuizen <janneke@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -712,7 +713,8 @@ in config.h of lightdm-tiny-greeter."
         (base32 "06r47ypf9lsy76jikrvihw8ka9j2wbrnn8g3sbxp819hcbqxg22z"))
        (patches (search-patches "slim-config.patch"
                                 "slim-login.patch"
-                                "slim-display.patch"))))
+                                "slim-display.patch"
+                                "slim-gcc-14.patch"))))
     (build-system cmake-build-system)
     (inputs (list fontconfig
                   freeglut

gnu/packages/patches/slim-gcc-14.patch

@@ -0,0 +1,12 @@
+Upstream status: Not presented upstream.
+
+--- slim-1.4.1/log.h.orig	2024-12-12 09:22:50.701696122 +0100
++++ slim-1.4.1/log.h	2024-12-12 09:22:20.673689802 +0100
+@@ -14,6 +14,7 @@
+ #define _LOG_H_
+ 
+ #include <fstream>
++#include "PAM.h"
+ 
+ using namespace std;
+