From 84b96cf7b3e0848591dce83474e9d6f82885504b Mon Sep 17 00:00:00 2001
From: Eric Kilmer <eric.d.kilmer@gmail.com>
Date: Fri, 23 Jul 2021 00:56:14 -0400
Subject: [PATCH] vcpkg_configure_make: MacOS assume target arch is host arch
 (#18632)

This is to guard against MacOS triplets that don't list
VCPKG_OSX_ARCHITECTURES
---
 scripts/cmake/vcpkg_configure_make.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/cmake/vcpkg_configure_make.cmake b/scripts/cmake/vcpkg_configure_make.cmake
index d1b87d454a0..599eaf5917c 100644
--- a/scripts/cmake/vcpkg_configure_make.cmake
+++ b/scripts/cmake/vcpkg_configure_make.cmake
@@ -148,7 +148,9 @@ endmacro()
 
 macro(_vcpkg_determine_autotools_target_arch_mac out_var)
     list(LENGTH VCPKG_OSX_ARCHITECTURES _num_osx_archs)
-    if(_num_osx_archs GREATER_EQUAL 2)
+    if(_num_osx_archs EQUAL 0)
+        set(${out_var} "${VCPKG_DETECTED_CMAKE_HOST_SYSTEM_PROCESSOR}")
+    elseif(_num_osx_archs GREATER_EQUAL 2)
         set(${out_var} "universal")
     else()
         # Better match the arch behavior of config.guess