From 70c57b9a29fce42c3f3a8fe1bbf286da62f116f2 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Mon, 16 Nov 2015 14:31:57 +0100
Subject: [PATCH 09/44] configure: probe for memfd
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Message-id: <1447684235-15638-3-git-send-email-mst@redhat.com>
Patchwork-id: 68356
O-Subject: [PATCH RHEV 7.3/7.2.z v2 02/36] configure: probe for memfd
Bugzilla: 1279388
RH-Acked-by: Xiao Wang <jasowang@redhat.com>
RH-Acked-by: Victor Kaplansky <vkaplans@redhat.com>
RH-Acked-by: Marcel Apfelbaum <marcel@redhat.com>
RH-Acked-by: Marc-André Lureau <mlureau@redhat.com>

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Check if memfd_create() is part of system libc.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
(cherry picked from commit 751bcc3981d80594a3943166401af15b76781a5b)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 configure | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/configure b/configure
index 280a1c2..cb4cf0b 100755
--- a/configure
+++ b/configure
@@ -3390,6 +3390,22 @@ if compile_prog "" "" ; then
   eventfd=yes
 fi
 
+# check if memfd is supported
+memfd=no
+cat > $TMPC << EOF
+#include <sys/memfd.h>
+
+int main(void)
+{
+    return memfd_create("foo", MFD_ALLOW_SEALING);
+}
+EOF
+if compile_prog "" "" ; then
+  memfd=yes
+fi
+
+
+
 # check for fallocate
 fallocate=no
 cat > $TMPC << EOF
@@ -4666,6 +4682,9 @@ fi
 if test "$eventfd" = "yes" ; then
   echo "CONFIG_EVENTFD=y" >> $config_host_mak
 fi
+if test "$memfd" = "yes" ; then
+  echo "CONFIG_MEMFD=y" >> $config_host_mak
+fi
 if test "$fallocate" = "yes" ; then
   echo "CONFIG_FALLOCATE=y" >> $config_host_mak
 fi
-- 
1.8.3.1