From ce61154cf542e630bc3e40262fdacdf20bf91b90 Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@cs.stanford.edu>
Date: Tue, 20 Aug 2019 08:33:52 +0900
Subject: [PATCH] Support file-scope functions

---
 chibicc.h | 1 +
 codegen.c | 3 ++-
 parse.c   | 1 +
 tests     | 2 ++
 4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/chibicc.h b/chibicc.h
index 80e608f..e754cb3 100644
--- a/chibicc.h
+++ b/chibicc.h
@@ -201,6 +201,7 @@ struct Function {
   Function *next;
   char *name;
   VarList *params;
+  bool is_static;
 
   Node *node;
   VarList *locals;
diff --git a/codegen.c b/codegen.c
index d2205f4..a143b01 100644
--- a/codegen.c
+++ b/codegen.c
@@ -574,7 +574,8 @@ void emit_text(Program *prog) {
   printf(".text\n");
 
   for (Function *fn = prog->fns; fn; fn = fn->next) {
-    printf(".global %s\n", fn->name);
+    if (!fn->is_static)
+      printf(".global %s\n", fn->name);
     printf("%s:\n", fn->name);
     funcname = fn->name;
 
diff --git a/parse.c b/parse.c
index e1930fa..fda2592 100644
--- a/parse.c
+++ b/parse.c
@@ -575,6 +575,7 @@ Function *function() {
   // Construct a function object
   Function *fn = calloc(1, sizeof(Function));
   fn->name = name;
+  fn->is_static = ty->is_static;
   expect("(");
   fn->params = read_func_params();
 
diff --git a/tests b/tests
index 8b329de..336c5f1 100644
--- a/tests
+++ b/tests
@@ -96,6 +96,8 @@ int param_decay(int x[]) { return x[0]; }
 
 void voidfn(void) {}
 
+static int static_fn(void) {}
+
 int main() {
   assert(8, ({ int a=3; int z=5; a+z; }), "int a=3; int z=5; a+z;");