docker: build libyang2 along with FRR

Alpine images have been broken for some time because libyang2 is not
available in Alpine. This patch updates our Dockerfile to build a
libyang2 APK and install it into the image to satisfy FRR's libyang2
dependency.

Unfortunately, libyang2 erroneously includes an internal header from
glibc, making it dependent on glibc to build. FRR's official Docker
images are based on Alpine, which only offers musl libc. Until libyang2
fixes this problem, the libyang2 source that is installed in this image
is a patched version that is compatible with musl libc and not an
official version.

Signed-off-by: Quentin Young <qlyoung@nvidia.com>

1 files changed, 298 insertions, 0 deletions

diff --git a/docker/alpine/libyang/10-remove-non-standard-headers.patch b/docker/alpine/libyang/10-remove-non-standard-headers.patch
new file mode 100644
index 000000000..18812b534
--- /dev/null
+++ b/docker/alpine/libyang/10-remove-non-standard-headers.patch
@@ -0,0 +1,298 @@
+From 8f4907590afbe3eafabcf5b461c0ae51b65c3a37 Mon Sep 17 00:00:00 2001
+From: Michal Vasko <mvasko@cesnet.cz>
+Date: Thu, 10 Jun 2021 15:07:02 +0200
+Subject: [PATCH] libyang BUGFIX do not include non-standard headers
+
+Fixes #1614
+---
+ src/context.c                            | 1 -
+ src/diff.c                               | 1 -
+ src/log.c                                | 1 -
+ src/out.c                                | 1 -
+ src/plugins_types.c                      | 1 -
+ src/plugins_types/bits.c                 | 1 -
+ src/plugins_types/date_and_time.c        | 1 -
+ src/plugins_types/identityref.c          | 1 -
+ src/plugins_types/integer.c              | 1 -
+ src/plugins_types/ipv4_address.c         | 1 -
+ src/plugins_types/ipv4_address_no_zone.c | 1 -
+ src/plugins_types/ipv4_prefix.c          | 1 -
+ src/plugins_types/ipv6_address.c         | 1 -
+ src/plugins_types/ipv6_address_no_zone.c | 1 -
+ src/plugins_types/ipv6_prefix.c          | 1 -
+ src/plugins_types/union.c                | 1 -
+ src/schema_compile_node.c                | 1 -
+ src/tree_data_helpers.c                  | 1 -
+ src/tree_schema.c                        | 1 -
+ src/validation.c                         | 1 -
+ src/xpath.c                              | 1 -
+ tools/re/main.c                          | 1 -
+ 22 files changed, 22 deletions(-)
+
+diff --git a/src/context.c b/src/context.c
+index eb671255..ac62cac5 100644
+--- a/src/context.c
++++ b/src/context.c
+@@ -17,7 +17,6 @@
+ #define _XOPEN_SOURCE 1
+ #define _XOPEN_SOURCE_EXTENDED 1
+ #endif
+-#include <sys/cdefs.h>
+ 
+ #include "context.h"
+ 
+diff --git a/src/diff.c b/src/diff.c
+index b40dd73a..4971c6fe 100644
+--- a/src/diff.c
++++ b/src/diff.c
+@@ -12,7 +12,6 @@
+  *     https://opensource.org/licenses/BSD-3-Clause
+  */
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "diff.h"
+ 
+diff --git a/src/log.c b/src/log.c
+index 97c7b283..9cd5fd0d 100644
+--- a/src/log.c
++++ b/src/log.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "log.h"
+ 
+diff --git a/src/out.c b/src/out.c
+index 37beb696..898d663a 100644
+--- a/src/out.c
++++ b/src/out.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "out.h"
+ #include "out_internal.h"
+diff --git a/src/plugins_types.c b/src/plugins_types.c
+index 26bac210..a2cf0f38 100644
+--- a/src/plugins_types.c
++++ b/src/plugins_types.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/bits.c b/src/plugins_types/bits.c
+index 9d086ffb..ef87691b 100644
+--- a/src/plugins_types/bits.c
++++ b/src/plugins_types/bits.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/date_and_time.c b/src/plugins_types/date_and_time.c
+index 0d52dbb1..a23caaa9 100644
+--- a/src/plugins_types/date_and_time.c
++++ b/src/plugins_types/date_and_time.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/identityref.c b/src/plugins_types/identityref.c
+index 90546d69..91ddbde2 100644
+--- a/src/plugins_types/identityref.c
++++ b/src/plugins_types/identityref.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/integer.c b/src/plugins_types/integer.c
+index 44e87f99..bf2b7812 100644
+--- a/src/plugins_types/integer.c
++++ b/src/plugins_types/integer.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv4_address.c b/src/plugins_types/ipv4_address.c
+index a95752ea..a7369d6b 100644
+--- a/src/plugins_types/ipv4_address.c
++++ b/src/plugins_types/ipv4_address.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv4_address_no_zone.c b/src/plugins_types/ipv4_address_no_zone.c
+index a17a7efe..1fb34b06 100644
+--- a/src/plugins_types/ipv4_address_no_zone.c
++++ b/src/plugins_types/ipv4_address_no_zone.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv4_prefix.c b/src/plugins_types/ipv4_prefix.c
+index 3108b2c5..6fb93390 100644
+--- a/src/plugins_types/ipv4_prefix.c
++++ b/src/plugins_types/ipv4_prefix.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv6_address.c b/src/plugins_types/ipv6_address.c
+index c0d20fa4..d09425b3 100644
+--- a/src/plugins_types/ipv6_address.c
++++ b/src/plugins_types/ipv6_address.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv6_address_no_zone.c b/src/plugins_types/ipv6_address_no_zone.c
+index c612b663..06bd1891 100644
+--- a/src/plugins_types/ipv6_address_no_zone.c
++++ b/src/plugins_types/ipv6_address_no_zone.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/ipv6_prefix.c b/src/plugins_types/ipv6_prefix.c
+index b3ad34b6..91431fef 100644
+--- a/src/plugins_types/ipv6_prefix.c
++++ b/src/plugins_types/ipv6_prefix.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/plugins_types/union.c b/src/plugins_types/union.c
+index a8ec43b3..89e81c7a 100644
+--- a/src/plugins_types/union.c
++++ b/src/plugins_types/union.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "plugins_types.h"
+ 
+diff --git a/src/schema_compile_node.c b/src/schema_compile_node.c
+index 424b7f8f..273023de 100644
+--- a/src/schema_compile_node.c
++++ b/src/schema_compile_node.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "schema_compile_node.h"
+ 
+diff --git a/src/tree_data_helpers.c b/src/tree_data_helpers.c
+index 488efbbb..2d9ba624 100644
+--- a/src/tree_data_helpers.c
++++ b/src/tree_data_helpers.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include <assert.h>
+ #include <ctype.h>
+diff --git a/src/tree_schema.c b/src/tree_schema.c
+index 93f29796..4a57cc47 100644
+--- a/src/tree_schema.c
++++ b/src/tree_schema.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "tree_schema.h"
+ 
+diff --git a/src/validation.c b/src/validation.c
+index b9eda810..e2062256 100644
+--- a/src/validation.c
++++ b/src/validation.c
+@@ -12,7 +12,6 @@
+  *     https://opensource.org/licenses/BSD-3-Clause
+  */
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "validation.h"
+ 
+diff --git a/src/xpath.c b/src/xpath.c
+index b68a76b8..ea1cdfc9 100644
+--- a/src/xpath.c
++++ b/src/xpath.c
+@@ -12,7 +12,6 @@
+  *     https://opensource.org/licenses/BSD-3-Clause
+  */
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include "xpath.h"
+ 
+diff --git a/tools/re/main.c b/tools/re/main.c
+index b512ad80..4d8aa99c 100644
+--- a/tools/re/main.c
++++ b/tools/re/main.c
+@@ -13,7 +13,6 @@
+  */
+ 
+ #define _GNU_SOURCE /* asprintf, strdup */
+-#include <sys/cdefs.h>
+ 
+ #include <errno.h>
+ #include <getopt.h>
+-- 
+2.31.1
+