From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001
From: Kacper <kacper@mail.openlinux.dev>
Date: Sun, 7 Dec 2025 20:10:31 +0100
Subject: Add build system scaffolding and libc headers

---
 lib/libc/ctype/toupper.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 lib/libc/ctype/toupper.c

(limited to 'lib/libc/ctype/toupper.c')

diff --git a/lib/libc/ctype/toupper.c b/lib/libc/ctype/toupper.c
new file mode 100644
index 00000000..e952acd9
--- /dev/null
+++ b/lib/libc/ctype/toupper.c
@@ -0,0 +1,14 @@
+#include <libc.h>
+#include <ctype.h>
+
+int toupper(int c)
+{
+	if (islower(c))
+		return c & 0x5f;
+	return c;
+}
+
+int toupper_l(int c, locale_t unused locale)
+{
+	return toupper(c);
+}
-- 
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