Add build system scaffolding and libc headers

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/libc/stdio/ftell.c b/lib/libc/stdio/ftell.c
new file mode 100644
index 00000000..c28fe143
--- /dev/null
+++ b/lib/libc/stdio/ftell.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <limits.h>
+#include <errno.h>
+
+long ftell(FILE *stream)
+{
+	off_t pos;
+
+	if ((pos = ftello(stream)) > LONG_MAX) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+
+	return pos;
+}