Improved mac support

src/config/config.go

@@ -1,5 +1,7 @@
 package config
 
+import "runtime"
+
 const (
 	// This is the absolute virtual minimum address we can load a program at, see `sysctl vm.mmap_min_addr`.
 	MinAddress = 0x10000
@@ -16,11 +18,30 @@ const (
 
 var (
 	// Shows the assembly instructions at the end of the compilation.
-	Assembler = false
+	Assembler bool
 
 	// Calculates the result of operations on constants at compile time.
-	ConstantFold = true
+	ConstantFold bool
 
 	// Skips writing the executable to disk.
-	Dry = false
+	Dry bool
+
+	// Target architecture.
+	TargetArch string
+
+	// Target platform.
+	TargetOS string
 )
+
+// Reset resets the configuration to its default values.
+func Reset() {
+	Assembler = false
+	ConstantFold = true
+	Dry = false
+	TargetArch = runtime.GOARCH
+	TargetOS = runtime.GOOS
+
+	if TargetOS == "darwin" {
+		TargetOS = "mac"
+	}
+}

src/config/init.go

@@ -16,6 +16,7 @@ var (
 
 func init() {
 	debug.SetGCPercent(-1)
+	Reset()
 
 	var err error
 	Executable, err = os.Executable()