[ptxdist] [PATCH] dtc: Apply upstream patch for build errors.

[Christian Melki <christian.melki@t2data.com>]

On some setups, these cause build errors.
Fixed upstream. Apply now, probably remove in next stable release.

Signed-off-by: Christian Melki <christian.melki@t2data.com>
---
 .../0001-Fix-discarded-const-qualifiers.patch | 80 +++++++++++++++++++
 patches/dtc-1.7.2/series                      |  4 +
 2 files changed, 84 insertions(+)
 create mode 100644 patches/dtc-1.7.2/0001-Fix-discarded-const-qualifiers.patch
 create mode 100644 patches/dtc-1.7.2/series

diff --git a/patches/dtc-1.7.2/0001-Fix-discarded-const-qualifiers.patch b/patches/dtc-1.7.2/0001-Fix-discarded-const-qualifiers.patch
new file mode 100644
index 000000000..766dbccc2
--- /dev/null
+++ b/patches/dtc-1.7.2/0001-Fix-discarded-const-qualifiers.patch
@@ -0,0 +1,80 @@
+From: Stephen Gallagher <sgallagh@redhat.com>
+Date: Tue, 6 Jan 2026 14:19:30 -0500
+Subject: [PATCH] Fix discarded const qualifiers
+
+It's unsafe to implicitly discard the const qualifier on a pointer. In
+overlay_fixup_phandle(), this was probably just an oversight, and making
+the "sep" variable a const char * is sufficient to fix it.
+
+In create_node(), however, the "p" variable is directly modifying the
+buffer pointed to by "const char* node_name". To fix this, we need to
+actually make a duplicate of the buffer and operate on that instead.
+
+This introduces a malloc()/free()  and an unbounded strdup() into the
+operation, but fdtput isn't a long-running service and the node_name
+argument comes directly from argv, so this shouldn't introduce a
+significant performance impact.
+
+Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
+Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
+---
+ fdtput.c             | 8 +++++---
+ libfdt/fdt_overlay.c | 3 ++-
+ meson.build          | 1 +
+ 3 files changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/fdtput.c b/fdtput.c
+index c2fecf45a977..8deec7eebcf5 100644
+--- a/fdtput.c
++++ b/fdtput.c
+@@ -230,19 +230,21 @@ static int create_paths(char **blob, const char *in_path)
+ static int create_node(char **blob, const char *node_name)
+ {
+ 	int node = 0;
+-	char *p;
++	const char *p;
++	char *path = NULL;
+ 
+ 	p = strrchr(node_name, '/');
+ 	if (!p) {
+ 		report_error(node_name, -1, -FDT_ERR_BADPATH);
+ 		return -1;
+ 	}
+-	*p = '\0';
+ 
+ 	*blob = realloc_node(*blob, p + 1);
+ 
+ 	if (p > node_name) {
+-		node = fdt_path_offset(*blob, node_name);
++		path = xstrndup(node_name, (size_t)(p - node_name));
++		node = fdt_path_offset(*blob, path);
++		free(path);
+ 		if (node < 0) {
+ 			report_error(node_name, -1, node);
+ 			return -1;
+diff --git a/libfdt/fdt_overlay.c b/libfdt/fdt_overlay.c
+index 28b667ffc490..5f8aa62b2686 100644
+--- a/libfdt/fdt_overlay.c
++++ b/libfdt/fdt_overlay.c
+@@ -409,7 +409,8 @@ static int overlay_fixup_phandle(void *fdt, void *fdto, int symbols_off,
+ 		const char *fixup_str = value;
+ 		uint32_t path_len, name_len;
+ 		uint32_t fixup_len;
+-		char *sep, *endptr;
++		const char *sep;
++		char *endptr;
+ 		int poffset, ret;
+ 
+ 		fixup_end = memchr(value, '\0', len);
+diff --git a/meson.build b/meson.build
+index 310699f0c874..2966b0614a69 100644
+--- a/meson.build
++++ b/meson.build
+@@ -18,6 +18,7 @@ add_project_arguments(
+     '-Wshadow',
+     '-Wsuggest-attribute=format',
+     '-Wwrite-strings',
++    '-Wdiscarded-qualifiers',
+   ]),
+   language: 'c'
+ )
diff --git a/patches/dtc-1.7.2/series b/patches/dtc-1.7.2/series
new file mode 100644
index 000000000..d6c2782c4
--- /dev/null
+++ b/patches/dtc-1.7.2/series
@@ -0,0 +1,4 @@
+# generated by git-ptx-patches
+#tag:base --start-number 1
+0001-Fix-discarded-const-qualifiers.patch
+# 3a8b95763e3400e890427bab311c296a  - git-ptx-patches magic
-- 
2.43.0