From 7ca8abc7884edd853f6f6967cfde9c4d88db16de Mon Sep 17 00:00:00 2001
From: Haolan <hello@liuxi.ng>
Date: Fri, 5 Sep 2025 19:00:53 +0800
Subject: [PATCH] fix: println

---
 runtime/internal/clite/stdio_baremental.go       |  7 ++-----
 runtime/internal/lib/runtime/maxprocs_default.go |  4 ++++
 runtime/internal/runtime/z_print.go              | 12 ++++++++++++
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/runtime/internal/clite/stdio_baremental.go b/runtime/internal/clite/stdio_baremental.go
index 539e198a..fe009932 100644
--- a/runtime/internal/clite/stdio_baremental.go
+++ b/runtime/internal/clite/stdio_baremental.go
@@ -20,10 +20,7 @@ package c
 
 import _ "unsafe"
 
-//go:linkname Stdin stdin
+// initialized by z_print because LLGoPackage skips calling init()
 var Stdin FilePtr
-
-//go:linkname Stdout stdout
 var Stdout FilePtr
-
-var Stderr FilePtr = Fopen(Str("/dev/stderr"), Str("w"))
+var Stderr FilePtr
diff --git a/runtime/internal/lib/runtime/maxprocs_default.go b/runtime/internal/lib/runtime/maxprocs_default.go
index 1788c76d..04d2b804 100644
--- a/runtime/internal/lib/runtime/maxprocs_default.go
+++ b/runtime/internal/lib/runtime/maxprocs_default.go
@@ -2,6 +2,10 @@
 
 package runtime
 
+import (
+	_ "unsafe"
+)
+
 const (
 	LLGoPackage = "link"
 	LLGoFiles   = "_wrap/runtime.c"
diff --git a/runtime/internal/runtime/z_print.go b/runtime/internal/runtime/z_print.go
index 21c5e36a..02b3c9b3 100644
--- a/runtime/internal/runtime/z_print.go
+++ b/runtime/internal/runtime/z_print.go
@@ -22,6 +22,18 @@ import (
 	c "github.com/goplus/llgo/runtime/internal/clite"
 )
 
+func init() {
+	if c.Stdin == nil {
+		c.Stdin = c.Fopen(c.Str("/dev/stdin"), c.Str("r"))
+	}
+	if c.Stdout == nil {
+		c.Stdout = c.Fopen(c.Str("/dev/stdout"), c.Str("w"))
+	}
+	if c.Stderr == nil {
+		c.Stderr = c.Stdout
+	}
+}
+
 func boolCStr(v bool) *c.Char {
 	if v {
 		return c.Str("true")