gnu: dtc: Add missing symbols patch from debian.

* gnu/packages/u-boot.scm (dtc)[source]: Add patch.
* gnu/packages/patches/dtc-add-missing-symbols-to-lds.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: David Craven <david@craven.ch>

gnu/local.mk

@@ -483,6 +483,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/doc++-include-directives.patch		\
   %D%/packages/patches/doc++-segfault-fix.patch			\
   %D%/packages/patches/doxygen-test.patch			\
+  %D%/packages/patches/dtc-add-missing-symbols-to-lds.patch     \
   %D%/packages/patches/duplicity-piped-password.patch		\
   %D%/packages/patches/duplicity-test_selection-tmp.patch	\
   %D%/packages/patches/elfutils-tests-ptrace.patch		\

gnu/packages/patches/dtc-add-missing-symbols-to-lds.patch

@@ -0,0 +1,59 @@
+From a4b093f7366fdb429ca1781144d3985fa50d0fbb Mon Sep 17 00:00:00 2001
+From: Julien Grall <julien.grall@linaro.org>
+Date: Tue, 17 Mar 2015 16:00:34 +0000
+Subject: [PATCH] libfdt: Add missing functions to shared library
+
+The commit 4e76ec7 "libfdt: Add fdt_next_subnode() to permit easy
+subnode iteration" adds new functions (fdt_{first,next}_subnode) but
+forgot to mark them as 'global' in the shared library.
+
+Signed-off-by: Julien Grall <julien.grall@linaro.org>
+---
+ libfdt/version.lds | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/libfdt/version.lds b/libfdt/version.lds
+index 80b322b..941208e 100644
+--- a/libfdt/version.lds
++++ b/libfdt/version.lds
+@@ -54,6 +54,8 @@ LIBFDT_1.2 {
+ 		fdt_get_property_by_offset;
+ 		fdt_getprop_by_offset;
+ 		fdt_next_property_offset;
++		fdt_first_subnode;
++		fdt_next_subnode;
+ 
+ 	local:
+ 		*;
+From f58799be130e27cc729cb2d45566daa0bb3b8605 Mon Sep 17 00:00:00 2001
+From: David Gibson <david@gibson.dropbear.id.au>
+Date: Tue, 1 Dec 2015 12:55:21 +1100
+Subject: [PATCH] libfdt: Add some missing symbols to version.lds
+
+Several functions in the header file were missing from the version.lds
+script, meaning that they couldn't be used from a libfdt shared library.
+
+Reported by Ken Aaker, via github issue tracker.
+
+Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
+---
+ libfdt/version.lds | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/libfdt/version.lds b/libfdt/version.lds
+index f19f157..1f4e1ea 100644
+--- a/libfdt/version.lds
++++ b/libfdt/version.lds
+@@ -57,6 +57,10 @@ LIBFDT_1.2 {
+ 		fdt_next_property_offset;
+ 		fdt_first_subnode;
+ 		fdt_next_subnode;
++		fdt_address_cells;
++		fdt_size_cells;
++		fdt_stringlist_contains;
++		fdt_resize;
+ 
+ 	local:
+ 		*;
+-- 
+2.8.1

gnu/packages/u-boot.scm

@@ -40,7 +40,9 @@
                     "dtc-" version ".tar.xz"))
               (sha256
                (base32
-                "155v52palf5fwfcnq696s41whjk0a5dqx98b7maqzdn7xbc2m6bp"))))
+                "155v52palf5fwfcnq696s41whjk0a5dqx98b7maqzdn7xbc2m6bp"))
+              (patches
+                (search-patches "dtc-add-missing-symbols-to-lds.patch"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("bison" ,bison)