povray: workaround

Author: cho-m

Formula/p/povray.rb

@@ -35,9 +35,23 @@ class Povray < Formula
 
   uses_from_macos "zlib"
 
+  on_sequoia do
+    # https://developer.apple.com/documentation/xcode-release-notes/xcode-16_4-release-notes#Apple-Clang-Compiler
+    if MacOS::Xcode.version.major_minor == "16.3" || MacOS::CLT.version.major_minor == "16.3"
+      depends_on "llvm@18" => :build
+    end
+  end
+
   def install
     ENV.cxx11
 
+    # https://developer.apple.com/documentation/xcode-release-notes/xcode-16_4-release-notes#Apple-Clang-Compiler
+    if MacOS::Xcode.version.major_minor == "16.3" || MacOS::CLT.version.major_minor == "16.3"
+      ENV["CC"] = Formula["llvm@18"].opt_bin/"clang"
+      ENV["CXX"] = Formula["llvm@18"].opt_bin/"clang++"
+      ENV.append_to_cflags "-I#{HOMEBREW_PREFIX}/include"
+    end
+
     args = %W[
       COMPILED_BY=homebrew
       --disable-debug