libtpms: fix build with glibc 2.43

Backport patch stable-0.10 branch (not tagged yet).

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

meta-tpm/recipes-tpm/libtpm/libtpms/0001-Fix-a-compilation-error-in-TPMLIB_GetPlaintext.patch

@@ -0,0 +1,34 @@
+From a20f8b6a22f1ae60d96ae7e554f5e13dd431471b Mon Sep 17 00:00:00 2001
+From: Stefan Berger <stefanb@linux.ibm.com>
+Date: Fri, 2 Jan 2026 11:37:31 -0500
+Subject: [PATCH] Fix a compilation error in TPMLIB_GetPlaintext
+
+Fix a compilation error that newer gcc versions may complain about:
+
+tpm_library.c: In function 'TPMLIB_GetPlaintext':
+tpm_library.c:441:11: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
+  441 |     start = strstr(stream, starttag);
+      |           ^
+At top level:
+cc1: note: unrecognized command-line option '-Wno-self-assign' may have been intended to silence earlier diagnostics
+cc1: all warnings being treated as errors
+
+Upstream-Status: Backport [https://github.com/stefanberger/libtpms/commit/a20f8b6a22f1ae60d96ae7e554f5e13dd431471b]
+Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
+---
+ src/tpm_library.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/tpm_library.c b/src/tpm_library.c
+index f48f4fd3..7b2ea687 100644
+--- a/src/tpm_library.c
++++ b/src/tpm_library.c
+@@ -435,7 +435,7 @@ static unsigned char *TPMLIB_GetPlaintext(const char *stream,
+                                           const char *endtag,
+                                           size_t *length)
+ {
+-    char *start, *end;
++    const char *start, *end;
+     unsigned char *plaintext = NULL;
+ 
+     start = strstr(stream, starttag);

meta-tpm/recipes-tpm/libtpm/libtpms_0.10.0.bb

@@ -3,7 +3,9 @@ LICENSE = "BSD-3-Clause"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=e73f0786a936da3814896df06ad225a9"
 
 SRCREV = "17f253a767f6b5b7813ae33f12bc79c479576cdc"
-SRC_URI = "git://github.com/stefanberger/libtpms.git;branch=stable-0.10;protocol=https"
+SRC_URI = "git://github.com/stefanberger/libtpms.git;branch=stable-0.10;protocol=https \
+    file://0001-Fix-a-compilation-error-in-TPMLIB_GetPlaintext.patch \
+"
 
 PE = "2"