Add attiny404 target spec

Author: agausmann

avr-specs/avr-attiny404.json

@@ -0,0 +1,25 @@
+{
+    "arch": "avr",
+    "atomic-cas": false,
+    "cpu": "attiny404",
+    "data-layout": "e-P1-p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8",
+    "eh-frame-header": false,
+    "exe-suffix": ".elf",
+    "late-link-args": {
+        "gcc": [
+            "-lgcc",
+            "-lc"
+        ]
+    },
+    "linker": "avr-gcc",
+    "llvm-target": "avr-unknown-unknown",
+    "max-atomic-width": 0,
+    "pre-link-args": {
+        "gcc": [
+            "-mmcu=attiny404"
+        ]
+    },
+    "relocation-model": "static",
+    "target-c-int-width": "16",
+    "target-pointer-width": "16"
+}