runtime: fix libc linking

internal/runtime/c/c.go

@@ -26,13 +26,13 @@ type (
 	FilePtr = unsafe.Pointer
 )
 
-//go:linkname Stdin llgo_stdin
+//go:linkname Stdin stdin
 var Stdin FilePtr
 
-//go:linkname Stdout llgo_stdout
+//go:linkname Stdout stdout
 var Stdout FilePtr
 
-//go:linkname Stderr llgo_stderr
+//go:linkname Stderr stderr
 var Stderr FilePtr
 
 //go:linkname Str llgo.cstr

internal/runtime/c/c_default.go

@@ -4,5 +4,5 @@
 package c
 
 const (
-	LLGoPackage = "decl: stdio_default.ll"
+	LLGoPackage = "decl: c_default.ll"
 )

internal/runtime/c/c_default.ll

@@ -4,6 +4,6 @@ source_filename = "github.com/goplus/llgo/internal/runtime/c"
 @__stderrp = external global ptr
 @__stdinp = external global ptr
 @__stdoutp = external global ptr
-@llgo_stdin = alias i8*, i8** @__stdinp
-@llgo_stdout = alias i8*, i8** @__stdoutp
-@llgo_stderr = alias i8*, i8** @__stderrp
+@stdin = alias i8*, i8** @__stdinp
+@stdout = alias i8*, i8** @__stdoutp
+@stderr = alias i8*, i8** @__stderrp

internal/runtime/c/c_linux.go

@@ -4,5 +4,5 @@
 package c
 
 const (
-	LLGoPackage = "decl: stdio_linux.ll"
+	LLGoPackage = "decl: c_linux.ll"
 )

internal/runtime/c/c_linux.ll

@@ -1,9 +1,2 @@
 ; ModuleID = 'github.com/goplus/llgo/internal/runtime/c'
 source_filename = "github.com/goplus/llgo/internal/runtime/c"
-
-@stderr = external global ptr
-@stdin = external global ptr
-@stdout = external global ptr
-@llgo_stdin = alias i8*, i8** @stdin
-@llgo_stdout = alias i8*, i8** @stdout
-@llgo_stderr = alias i8*, i8** @stderr