Move lenType definition to runtime (partially)

compiler.go

@@ -88,7 +88,7 @@ func NewCompiler(pkgName, triple string, dumpSSA bool) (*Compiler, error) {
 
 	// Depends on platform (32bit or 64bit), but fix it here for now.
 	c.intType = llvm.Int32Type()
-	c.lenType = llvm.Int32Type()
+	c.lenType = llvm.Int32Type() // also defined as runtime.lenType
 	c.uintptrType = c.targetData.IntPtrType()
 	c.i8ptrType = llvm.PointerType(llvm.Int8Type(), 0)
 

main.go

@@ -13,11 +13,15 @@ func Compile(pkgName, runtimePath, outpath, target string, printIR, dumpSSA bool
 	var buildTags []string
 	// TODO: put this somewhere else
 	if target == "pca10040" {
-		buildTags = append(buildTags, "nrf", "nrf52", "nrf52832")
+		// Pretend to be a WASM target, not ARM (for standard library support).
+		buildTags = append(buildTags, "nrf", "nrf52", "nrf52832", "js", "wasm")
 		target = "armv7m-none-eabi"
 	} else if target == "arduino" {
-		buildTags = append(buildTags, "avr", "avr8", "atmega", "atmega328p")
+		// Pretend to be a WASM target, not AVR (for standard library support).
+		buildTags = append(buildTags, "avr", "avr8", "atmega", "atmega328p", "js", "wasm")
 		target = "avr--"
+	} else {
+		buildTags = append(buildTags, "linux", "amd64")
 	}
 
 	c, err := NewCompiler(pkgName, target, dumpSSA)

src/runtime/arch_amd64.go

@@ -0,0 +1,8 @@
+// +build amd64
+
+package runtime
+
+const GOARCH = "amd64"
+
+// The length type used inside strings and slices.
+type lenType uint32

src/runtime/arch_wasm.go

@@ -0,0 +1,8 @@
+// +build wasm
+
+package runtime
+
+const GOARCH = "wasm"
+
+// The length type used inside strings and slices.
+type lenType uint32

src/runtime/hashmap.go

@@ -13,7 +13,7 @@ import (
 type hashmap struct {
 	next       *hashmap       // hashmap after evacuate (for iterators)
 	buckets    unsafe.Pointer // pointer to array of buckets
-	count      uint
+	count      lenType
 	keySize    uint8 // maybe this can store the key type as well? E.g. keysize == 5 means string?
 	valueSize  uint8
 	bucketBits uint8