From 70ce1ad64a04a244bb1c03753da0752c61fc3a37 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 10 Aug 2020 13:29:29 -0400
Subject: PCH: Avoid Apple-specific architecture flags on other platforms

Since commit f593b354da (PCH: Add support for multi architecture iOS
projects, 2020-04-02, v3.18.0-rc1~414^2) the `OSX_ARCHITECTURES` target
property (and corresponding `CMAKE_OSX_ARCHITECTURES` variable) affects
flags on non-Apple platforms by accident.  Add a missing condition to
avoid this.

Fixes: #21072
---
 Source/cmGeneratorTarget.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index c7baf2b..ab6a26c 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -3032,6 +3032,9 @@ std::string cmGeneratorTarget::GetCompilePDBDirectory(
 void cmGeneratorTarget::GetAppleArchs(const std::string& config,
                                       std::vector<std::string>& archVec) const
 {
+  if (!this->Makefile->IsOn("APPLE")) {
+    return;
+  }
   cmProp archs = nullptr;
   if (!config.empty()) {
     std::string defVarName =
-- 
cgit v0.12