-fno-rosetta flag

Library/Homebrew/extend/os/mac/formula.rb

@@ -32,6 +32,20 @@ module OS
 
         args
       end
+
+      sig {
+        params(
+          prefix:       T.any(String, Pathname),
+          release_mode: String
+        ).returns(T::Array[String])
+      }
+      def std_zig_args(prefix: self.prefix, release_mode: "fast")
+        args = super
+        # it is probably better to add this flag only on arm macs
+        # my attempts with `MacOS::Hardware::CPU.arm?` and its variations didn't work out
+        args << "-fno-rosetta"
+        args
+      end
     end
   end
 end

Library/Homebrew/formula.rb

@@ -1954,12 +1954,14 @@ class Formula
            release_mode: String).returns(T::Array[String])
   }
   def std_zig_args(prefix: self.prefix, release_mode: "fast")
-    release_mode = release_mode.downcase
-    args = ["--prefix", prefix.to_s, "--release=#{release_mode}"]
-    release_mode_uc = release_mode.capitalize
-    args << "-Doptimize=Release#{release_mode_uc}"
-    args += ["--summary", "all"]
-    args
+    release_mode_downcased = release_mode.downcase
+    release_mode_capitalized = release_mode.capitalize
+    [
+      "--prefix", prefix.to_s,
+      "--release=#{release_mode_downcased}",
+      "-Doptimize=Release#{release_mode_capitalized}",
+      "--summary", "all",
+    ]
   end
 
   # Shared library names according to platform conventions.