From 420e91c9517e5b753b4ae254896059f33ddee7d3 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 14 Apr 2020 14:45:29 -0400
Subject: AIX: Activate symbol export/import IBM i (OS400)

Fixes: #20582
---
 Source/cmTarget.cxx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 80986fc..cdfd349 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -235,8 +235,11 @@ cmTarget::cmTarget(std::string const& name, cmStateEnums::TargetType type,
     !impl->Makefile->GetSafeDefinition("CMAKE_IMPORT_LIBRARY_SUFFIX").empty();
 
   // Check whether we are targeting AIX.
-  impl->IsAIX =
-    (impl->Makefile->GetSafeDefinition("CMAKE_SYSTEM_NAME") == "AIX");
+  {
+    std::string const& systemName =
+      impl->Makefile->GetSafeDefinition("CMAKE_SYSTEM_NAME");
+    impl->IsAIX = (systemName == "AIX" || systemName == "OS400");
+  }
 
   // Check whether we are targeting an Android platform.
   impl->IsAndroid =
-- 
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