hardware: add arm64?

Author: cho-m

Library/Homebrew/extend/os/linux/diagnostic.rb

@@ -82,7 +82,7 @@ def check_umask_not_zero
         sig { returns(T.nilable(String)) }
         def check_supported_architecture
           return if ::Hardware::CPU.intel?
-          return if ::Hardware::CPU.arm? && ::Hardware::CPU.is_64_bit?
+          return if ::Hardware::CPU.arm64?
 
           <<~EOS
             Your CPU architecture (#{::Hardware::CPU.arch}) is not supported. We only support

Library/Homebrew/extend/os/linux/extend/ENV/super.rb

@@ -45,19 +45,19 @@ def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_a
         self["HOMEBREW_RPATH_PATHS"] = determine_rpath_paths(@formula)
         m4_path_deps = ["libtool", "bison"]
         self["M4"] = "#{HOMEBREW_PREFIX}/opt/m4/bin/m4" if deps.any? { m4_path_deps.include?(_1.name) }
-        if ::Hardware::CPU.arch == :arm64
+        if ::Hardware::CPU.arm64?
           # Build jemalloc-sys rust crate on ARM64/AArch64 with support for page sizes up to 64K.
           self["JEMALLOC_SYS_WITH_LG_PAGE"] = "16"
 
           # Workaround patchelf.rb bug causing segfaults and preventing bottling on ARM64/AArch64
           # https://github.com/Homebrew/homebrew-core/issues/163826
           self["CGO_ENABLED"] = "0"
-        end
 
-        # Pointer authentication and BTI are hardening techniques most distros
-        # use by default on their packages. arm64 Linux we're packaging
-        # everything from scratch so the entire dependency tree can have it.
-        append_to_cccfg "b" if ::Hardware::CPU.arch == :arm64 && ::DevelopmentTools.gcc_version("gcc") >= 9
+          # Pointer authentication and BTI are hardening techniques most distros
+          # use by default on their packages. arm64 Linux we're packaging
+          # everything from scratch so the entire dependency tree can have it.
+          append_to_cccfg "b" if ::DevelopmentTools.gcc_version("gcc") >= 9
+        end
       end
 
       sig { returns(T::Array[Pathname]) }

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

@@ -12,7 +12,7 @@ def oldest_cpu(version = nil)
           else
             MacOS.version
           end
-          if ::Hardware::CPU.arch == :arm64
+          if ::Hardware::CPU.arm64?
             :arm_vortex_tempest
           # This cannot use a newer CPU e.g. haswell because Rosetta 2 does not
           # support AVX instructions in bottles:

Library/Homebrew/hardware.rb

@@ -163,6 +163,12 @@ def arm?
         type == :arm
       end
 
+      # Check whether the CPU architecture is 64-bit ARM.
+      sig { returns(T::Boolean) }
+      def arm64?
+        arm? && is_64_bit?
+      end
+
       sig { returns(T::Boolean) }
       def little_endian?
         !big_endian?

Library/Homebrew/requirements/arch_requirement.rb

@@ -21,7 +21,7 @@ def initialize(tags)
   satisfy(build_env: false) do
     case @arch
     when :x86_64 then Hardware::CPU.intel? && Hardware::CPU.is_64_bit?
-    when :arm64 then Hardware::CPU.arm? && Hardware::CPU.is_64_bit?
+    when :arm64 then Hardware::CPU.arm64?
     when :arm, :intel, :ppc then Hardware::CPU.type == @arch
     end
   end