From 808f804698aed7fb010fa62a593cc951eb9d2d2d Mon Sep 17 00:00:00 2001
From: Victor <51155307+VicNine@users.noreply.github.com>
Date: Fri, 8 Jan 2021 15:11:57 +0800
Subject: [PATCH] fix errors when excute $ brew tap ros/deps

fix errors when excute $ brew tap ros/deps

Error: Invalid formula: /usr/local/Homebrew/Library/Taps/ros/homebrew-deps/gfortran.rb
gfortran: undefined method `prefer_64_bit?' for OS::Mac:Module
Error: Cannot tap ros/deps: invalid syntax in tap!
---
 gfortran.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gfortran.rb b/gfortran.rb
index 5547b14..ae6384a 100644
--- a/gfortran.rb
+++ b/gfortran.rb
@@ -12,7 +12,7 @@ class Gfortran < Formula
 
   option 'enable-profiled-build', 'Make use of profile guided optimization when bootstrapping GCC'
   option 'check', 'Run the make check fortran. This is for maintainers.'
-  option 'enable-multilib', 'Build with multilib support' if MacOS.prefer_64_bit?
+  option 'enable-multilib', 'Build with multilib support' if MacOS.is_64_bit?
 
   depends_on 'gmp'
   depends_on 'libmpc'
@@ -60,7 +60,7 @@ def install
     ]
 
     # https://github.com/Homebrew/homebrew/issues/19584#issuecomment-19661219
-    if build.include? 'enable-multilib' and MacOS.prefer_64_bit?
+    if build.include? 'enable-multilib' and MacOS.is_64_bit?
       args << '--enable-multilib'
     else
       args << '--disable-multilib'