readline: Fixed build with GCC-15

(From OE-Core rev: 58bfcc0d3adcdfc8da63dd552ad54376a0f20b93)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/readline/readline/0001-Add-fix-for-packages-that-are-not-compatible-with-C2.patch

@@ -0,0 +1,29 @@
+From 9459ee899a291c55f08341df63e9a1b9b7af200a Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sun, 16 Mar 2025 12:48:46 -0700
+Subject: [PATCH] Add fix for packages that are not compatible with C23
+
+Fixes builds with GCC-15
+Sourced from Fedora: https://src.fedoraproject.org/rpms/readline/c/c47eb813afb942128253213ad5b8221770557e48?branch=rawhide
+
+Help getting packages like bluez5 building
+
+Upstream-Status: Submitted [https://lists.gnu.org/archive/html/bug-readline/2025-03/msg00001.html]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ rlstdc.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/rlstdc.h b/rlstdc.h
+index 2aaa30b..a7a0ef3 100644
+--- a/rlstdc.h
++++ b/rlstdc.h
+@@ -44,7 +44,7 @@
+ 
+ /* Moved from config.h.in because readline.h:rl_message depends on these
+    defines. */
+-#if defined (__STDC__) && defined (HAVE_STDARG_H)
++#if defined (__STDC__)
+ #  define PREFER_STDARG
+ #  define USE_VARARGS
+ #else

meta/recipes-core/readline/readline_8.2.13.bb

@@ -1,5 +1,7 @@
 require readline.inc
 
-SRC_URI += "  file://norpath.patch"
+SRC_URI += "file://norpath.patch \
+            file://0001-Add-fix-for-packages-that-are-not-compatible-with-C2.patch \
+            "
 
 SRC_URI[archive.sha256sum] = "0e5be4d2937e8bd9b7cd60d46721ce79f88a33415dd68c2d738fb5924638f656"