feat: implement #include <systemheader>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/stdarg.h b/include/stdarg.h
new file mode 100644
index 0000000..43138b6
--- /dev/null
+++ b/include/stdarg.h
@@ -0,0 +1,20 @@
+// System V Application Binary Interface
+// AMD64 Architecture Processor Supplement
+// (With LP64 and ILP32 Programming Models)
+// Version 1.0
+// Figure 3.34: va_list Type Declaration
+struct __va_list__ {
+    // unsigned int gp_offset;
+    // unsigned int fp_offset;
+    int gp_offset;
+    int fp_offset;
+    void* overflow_arg_area;
+    void* reg_save_area;
+};
+// ducc currently does not support array type.
+// typedef struct __va_list__ va_list[1];
+typedef struct __va_list__* va_list;
+
+// va_start() is currently implemented as a special form due to the limitation of #define macro.
+void va_end(va_list args) {
+}