add errno setting to stub utmpxname function

[musl] / src / legacy / getdtablesize.c

diff --git a/src/legacy/getdtablesize.c b/src/legacy/getdtablesize.c
index 623a6af..682da6d 100644 (file)
--- a/src/legacy/getdtablesize.c
+++ b/src/legacy/getdtablesize.c
@@ -1,3 +1,5 @@
+#define _GNU_SOURCE
+#include <unistd.h>
 #include <limits.h>
 #include <sys/resource.h>