From 10a3b87db80ae87d6d01ef2af562a732055da1c2 Mon Sep 17 00:00:00 2001
From: Emil Imbert Villumsen <emimvi@gmail.com>
Date: Sat, 7 Jun 2025 00:33:18 +0200
Subject: Remove unnecessary compile definitions (#7355)

* Remove unused compile definitions

No need for full external path; slang is already linking with the
SPIRV-Headers cmake target which adds the proper include flags
---
 CMakeLists.txt                          | 16 ----------------
 source/slang/slang-ir-glsl-legalize.cpp |  5 -----
 2 files changed, 21 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2c4f8d410..ca3d4b806 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -241,22 +241,6 @@ advanced_option(
     OFF
 )
 
-if(${SLANG_USE_SYSTEM_LZ4})
-    add_compile_definitions(SLANG_USE_SYSTEM_LZ4_HEADER)
-endif()
-
-if(${SLANG_USE_SYSTEM_SPIRV_HEADERS})
-    add_compile_definitions(SLANG_USE_SYSTEM_SPIRV_HEADER)
-endif()
-
-if(${SLANG_USE_SYSTEM_UNORDERED_DENSE})
-    add_compile_definitions(SLANG_USE_SYSTEM_UNORDERED_DENSE_HEADER)
-endif()
-
-if(SLANG_OVERRIDE_SPIRV_HEADERS_PATH)
-    add_compile_definitions(SLANG_USE_SYSTEM_SPIRV_HEADER)
-endif()
-
 enum_option(
     SLANG_LIB_TYPE
     # Default
diff --git a/source/slang/slang-ir-glsl-legalize.cpp b/source/slang/slang-ir-glsl-legalize.cpp
index fa7e69fa4..3cf547c17 100644
--- a/source/slang/slang-ir-glsl-legalize.cpp
+++ b/source/slang/slang-ir-glsl-legalize.cpp
@@ -11,12 +11,7 @@
 #include "slang-ir.h"
 
 #include <functional>
-
-#ifdef SLANG_USE_SYSTEM_SPIRV_HEADER
 #include <spirv/unified1/spirv.h>
-#else
-#include "../../external/spirv-headers/include/spirv/unified1/spirv.h"
-#endif
 
 namespace Slang
 {
-- 
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