compiler: require go1.23 for structs.HostLayout

Author: ydnar

compiler/symbol.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"github.com/tinygo-org/tinygo/compiler/llvmutil"
+	"github.com/tinygo-org/tinygo/goenv"
 	"github.com/tinygo-org/tinygo/loader"
 	"golang.org/x/tools/go/ssa"
 	"tinygo.org/x/go-llvm"
@@ -465,7 +466,7 @@ func (c *compilerContext) isValidWasmType(typ types.Type, site wasmSite) bool {
 			return true
 		}
 		var hasHostLayout bool
-		if c.program.ImportedPackage("structs") == nil {
+		if !goenv.WantGoVersion(c.pkg.GoVersion(), 1, 23) {
 			hasHostLayout = true // package structs does not exist before go1.23
 		}
 		for i := 0; i < typ.NumFields(); i++ {