[OE-core] [PATCH] libxshmfence: fix build with glibc 2.27

[Ross Burton]

With glibc 2.27 memfd_create() is behind a _GNU_SOURCE guard, so use
AC_USE_SYSTEM_EXTENSIONS to define it.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 .../xorg-lib/libxshmfence/extensions.patch              | 17 +++++++++++++++++
 meta/recipes-graphics/xorg-lib/libxshmfence_1.2.bb      |  2 ++
 2 files changed, 19 insertions(+)
 create mode 100644 meta/recipes-graphics/xorg-lib/libxshmfence/extensions.patch

diff --git a/meta/recipes-graphics/xorg-lib/libxshmfence/extensions.patch b/meta/recipes-graphics/xorg-lib/libxshmfence/extensions.patch
new file mode 100644
index 00000000000..4cc9e05ab53
--- /dev/null
+++ b/meta/recipes-graphics/xorg-lib/libxshmfence/extensions.patch
@@ -0,0 +1,17 @@
+With glibc 2.27 memfd_create is behind a _GNU_SOURCE guard, so call
+AC_USE_SYSTEM_EXTENSIONS to get that defined.
+
+Upstream-Status: Submitted
+Signed-off-by: Ross Burton <ross.burton at intel.com>
+
+diff --git a/configure.ac b/configure.ac
+index 0c98875..ebf4dee 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -29,4 +29,6 @@ AC_CONFIG_SRCDIR([Makefile.am])
+ AC_CONFIG_HEADERS([config.h])
+ 
++AC_USE_SYSTEM_EXTENSIONS
++
+ # Initialize Automake
+ AM_INIT_AUTOMAKE([foreign dist-bzip2])
diff --git a/meta/recipes-graphics/xorg-lib/libxshmfence_1.2.bb b/meta/recipes-graphics/xorg-lib/libxshmfence_1.2.bb
index ae34b1fe46c..1df068d1b0f 100644
--- a/meta/recipes-graphics/xorg-lib/libxshmfence_1.2.bb
+++ b/meta/recipes-graphics/xorg-lib/libxshmfence_1.2.bb
@@ -13,5 +13,7 @@ DEPENDS += "virtual/libx11"
 
 BBCLASSEXTEND = "native nativesdk"
 
+SRC_URI += "file://extensions.patch"
+
 SRC_URI[md5sum] = "66662e76899112c0f99e22f2fc775a7e"
 SRC_URI[sha256sum] = "d21b2d1fd78c1efbe1f2c16dae1cb23f8fd231dcf891465b8debe636a9054b0c"
-- 
2.11.0