Change in encapsulate[master]: Declare usage of GNU features

[Patrick Georgi (Code Review)]

Patrick Georgi has uploaded this change for review. ( https://review.coreboot.org/c/encapsulate/+/56220 )

Change subject: Declare usage of GNU features
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Declare usage of GNU features

unshare() is only available with it on glibc (even though it's probably
not GNU?), leading to a warning and potentially unsafe compilation
due to default types.

Change-Id: I6f3f5c4b3afa3407802fe33728a11106d1e53990
Signed-off-by: Patrick Georgi 
---
M encapsulate.c
1 file changed, 2 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/encapsulate refs/changes/20/56220/1

diff --git a/encapsulate.c b/encapsulate.c
index 439fd93..e3a4d93 100644
--- a/encapsulate.c
+++ b/encapsulate.c
@@ -14,6 +14,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

+#define _GNU_SOURCE
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mount.h>