From 5fbb0650d555f2301c25e88a3b35b352b3fe5304 Mon Sep 17 00:00:00 2001
From: Chuck Walbourn <chuckw@microsoft.com>
Date: Sat, 9 Nov 2024 12:32:36 -0800
Subject: [PATCH] CMake. So picky

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d894bead..796648c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,7 +77,7 @@ endif()
 include(GNUInstallDirs)
 include(build/CompilerAndLinker.cmake)
 
-if(${DIRECTX_ARCH} STREQUAL "arm64ec")
+if((DEFINED DIRECTX_ARCH) AND (${DIRECTX_ARCH} STREQUAL "arm64ec"))
   # OpenEXR doesn't support ARM64EC
   set(ENABLE_OPENEXR_SUPPORT OFF)
 endif()