usr: sdk: Add sdk/stdarg.h

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/usr/sdk/inc/sdk/stdarg.h b/usr/sdk/inc/sdk/stdarg.h
new file mode 100644
index 0000000..09c538f
--- /dev/null
+++ b/usr/sdk/inc/sdk/stdarg.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025, Ian Moffett.
+ * Provided under the BSD-3 clause.
+ */
+
+#ifndef _LIB_STDARG_H_
+#define _LIB_STDARG_H_ 1
+
+#ifndef __GNUC_VA_LIST
+#define __GNUC_VA_LIST
+typedef __builtin_va_list __gnuc_va_list;
+#endif      /* __GNUC_VA_LIST */
+
+typedef __gnuc_va_list va_list;
+
+#define va_start(ap, last)  __builtin_va_start((ap), last)
+#define va_end(ap)          __builtin_va_end((ap))
+#define va_arg(ap, type)    __builtin_va_arg((ap), type)
+
+#endif  /* !_LIB_STDARG_H_ */