socat: fix native build on host with newer glibc

Fixes:
../socat-1.8.0.0/filan.c: In function ?printtime?:
../socat-1.8.0.0/filan.c:1065:46: error: assignment of read-only location ?*(const char *)strchr(s, 10)?
 1065 |       if (strchr(s, '\n'))  *strchr(s, '\n') = '\0';
      |                                              ^

(From OE-Core rev: 0cd52c822a9929399fe8840955ff451216182f36)

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/socat/files/0001-Fixed-strchr-with-const-for-new-glibc.patch

@@ -0,0 +1,38 @@
+From 3033625d5a67514e3d74021fc39f7fcb542d7f2d Mon Sep 17 00:00:00 2001
+From: Gerhard Rieger <gerhard@dest-unreach.org>
+Date: Wed, 11 Feb 2026 14:06:25 +0100
+Subject: [PATCH] Fixed strchr with const for new glibc
+
+Upstream-Status: Backport [https://repo.or.cz/socat.git/commit/a7058c9340db0bf90bf4372de0ae87ad37f57735]
+Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
+---
+ filan.c   | 2 +-
+ xio-ip6.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/filan.c b/filan.c
+index 36def50..e256f74 100644
+--- a/filan.c
++++ b/filan.c
+@@ -1055,7 +1055,7 @@ const char *getfiletypestring(int st_mode) {
+ }
+ 
+ static int printtime(FILE *outfile, time_t time) {
+-   const char *s;
++   char *s;
+ 
+    if (filan_rawoutput) {
+       fprintf(outfile, "\t"F_time, time);
+diff --git a/xio-ip6.c b/xio-ip6.c
+index bd94bdd..09abdd1 100644
+--- a/xio-ip6.c
++++ b/xio-ip6.c
+@@ -114,7 +114,7 @@ int xioparsenetwork_ip6(
+ 	struct xiorange *range,
+ 	const int ai_flags[2])
+ {
+-   char *delimpos;	/* absolute address of delimiter */
++   const char *delimpos;	/* absolute address of delimiter */
+    size_t delimind;	/* index of delimiter in string */
+    unsigned int bits;	/* netmask bits */
+    char *endptr;

meta/recipes-connectivity/socat/socat_1.8.0.0.bb

@@ -11,6 +11,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
 
 SRC_URI = "http://www.dest-unreach.org/socat/download/socat-${PV}.tar.bz2 \
            file://0001-fix-compile-procan.c-failed.patch \
+           file://0001-Fixed-strchr-with-const-for-new-glibc.patch \
            file://CVE-2024-54661.patch \
            file://CVE-2026-56123.patch \
 "