Subzero. WASM. Additional progress.

wasm-tests/write_loop.c

+// This is derived from the loop in musl's __fwritex that looks for newlines.
+
+int puts(const char *s);
+
+int main(int argc, const char **argv) {
+  const char *p = (const char *)argv;
+  char *s = "Hello\nWorld";
+  unsigned i = 0;
+  // Depend on argc to avoid having this whole thing get dead-code-eliminated.
+  for (i = 14 - argc; i && p[i - 1] != '\n'; i--)
+    ;
+  puts(s);
+  return i;
+}