Include <cerrno>
When compiling on Linux host to armv7a target following to the tutorial, got error of "errno undeclared". Include this header fixed this problem.
diff --git a/test_helpers/Utils.cpp b/test_helpers/Utils.cpp
index 4c0e816..4d87d53 100644
--- a/test_helpers/Utils.cpp
+++ b/test_helpers/Utils.cpp
@@ -26,7 +26,7 @@
#include <cctype>
#include <iomanip>
#include <string>
-
+#include <cerrno>
namespace
{
/* Advance the iterator to the first character which is not a comment
@@ -161,4 +161,4 @@
fs.ignore(1);
return std::make_tuple(width, height, max_val);
-}
\ No newline at end of file
+}