Allow disabling arch flag filtering

Closes #17352.

2 files changed, 7 insertions, 0 deletions

diff --git a/Library/Homebrew/extend/ENV/shared.rb b/Library/Homebrew/extend/ENV/shared.rb
index bda1f509c..b7db7df62 100644
--- a/Library/Homebrew/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/ENV/shared.rb
@@ -239,4 +239,6 @@ module SharedEnvExtension
       EOS
     end
   end
+
+  def permit_arch_flags; end
 end
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index b9179c89c..5b3b8c5c5 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -81,6 +81,7 @@ module Superenv
     # x - Enable C++11 mode.
     # g - Enable "-stdlib=libc++" for clang.
     # h - Enable "-stdlib=libstdc++" for clang.
+    # K - Don't strip -arch <arch>, -m32, or -m64
     #
     # On 10.8 and newer, these flags will also be present:
     # s - apply fix for sed's Unicode support
@@ -266,6 +267,10 @@ module Superenv
     end
   end
 
+  def permit_arch_flags
+    append "HOMEBREW_CCCFG", "K"
+  end
+
   def cxx11
     case self["HOMEBREW_CC"]
     when "clang"