From 63ffcdd958109682677ba946f0cc3f89acfd45ec Mon Sep 17 00:00:00 2001
From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Date: Thu, 14 Oct 2021 17:48:23 +0200
Subject: [PATCH] test: zephyr: fix 'errno' undeclared

The return value should be negative.
Added inclusion of errno.h to avoid an unresolved symbol
error when linking the  test.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 test/system/zephyr/alloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/system/zephyr/alloc.c b/test/system/zephyr/alloc.c
index e3b86df..2944b62 100644
--- a/test/system/zephyr/alloc.c
+++ b/test/system/zephyr/alloc.c
@@ -7,6 +7,7 @@
 #include <stdlib.h>
 
 #include <metal/alloc.h>
+#include <metal/errno.h>
 #include <metal/log.h>
 #include <metal/sys.h>
 #include <sys/printk.h>
@@ -19,7 +20,7 @@ static int alloc(void)
 	ptr = metal_allocate_memory(1000);
 	if (!ptr) {
 		metal_log(METAL_LOG_DEBUG, "failed to allocate memmory\n");
-		return errno;
+		return -errno;
 	}
 
 	metal_free_memory(ptr);