fix: symbol not found when building in baremental environment

runtime/internal/lib/internal/syscall/unix/fcntl_baremental.go

@@ -0,0 +1,15 @@
+//go:build baremental
+
+package unix
+
+import (
+	_ "unsafe"
+)
+
+func Fcntl(fd int, cmd int, arg int) (int, error) {
+	return 0, nil
+}
+
+func fcntl(fd int, cmd int, arg int) (int, error) {
+	return 0, nil
+}

runtime/internal/lib/internal/syscall/unix/fcntl_unix.go

@@ -1,3 +1,5 @@
+//go:build !baremental
+
 package unix
 
 import (

runtime/internal/lib/runtime/maxprocs_baremental.go

@@ -0,0 +1,5 @@
+//go:build baremental
+
+package runtime
+
+func c_maxprocs() int32 { return 1 }

runtime/internal/lib/runtime/maxprocs_default.go

@@ -0,0 +1,11 @@
+//go:build !baremental
+
+package runtime
+
+const (
+	LLGoPackage = "link"
+	LLGoFiles   = "_wrap/runtime.c"
+)
+
+//go:linkname c_maxprocs C.llgo_maxprocs
+func c_maxprocs() int32

runtime/internal/lib/runtime/runtime.go

@@ -26,11 +26,6 @@ import (
 // llgo:skipall
 type _runtime struct{}
 
-const (
-	LLGoPackage = "link"
-	LLGoFiles   = "_wrap/runtime.c"
-)
-
 var defaultGOROOT string // set by cmd/link
 
 func GOROOT() string {
@@ -43,9 +38,6 @@ func Version() string {
 	return buildVersion
 }
 
-//go:linkname c_maxprocs C.llgo_maxprocs
-func c_maxprocs() int32
-
 func GOMAXPROCS(n int) int {
 	return int(c_maxprocs())
 }