--- a/tools/kwbimage.c
+++ b/tools/kwbimage.c
@@ -206,6 +206,30 @@ INVL_DATA:
 	exit (EXIT_FAILURE);
 }
 
+#ifndef __GLIBC__
+#if !defined(__APPLE__) || __DARWIN_C_LEVEL < 200809L
+static ssize_t
+getline(char **line, size_t *len, FILE *fd)
+{
+	char *tmp;
+	int tmplen;
+
+	tmp = fgetln(fd, &tmplen);
+	if (!tmp)
+		return -1;
+
+	if (!*line || tmplen > *len) {
+		*len = tmplen + 1;
+		*line = realloc(*line, *len);
+	}
+
+	strncpy(*line, tmp, tmplen);
+	line[tmplen] = 0;
+	return tmplen;
+}
+#endif
+#endif
+
 /*
  * this function sets the kwbimage header by-
  * 	1. Abstracting input command line arguments data