From 04ff84bc3546c971bfdc930f029d35baf420b839 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?MACHIZAUD=20Andr=C3=A9a?= <andrea.machizaud@gmail.com>
Date: Mon, 9 May 2022 16:44:59 +0200
Subject: [PATCH] Expose preprocessor definition about enabled features

---
 opensubdiv/CMakeLists.txt | 51 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/opensubdiv/CMakeLists.txt b/opensubdiv/CMakeLists.txt
index 07cba067..5047fe56 100644
--- a/opensubdiv/CMakeLists.txt
+++ b/opensubdiv/CMakeLists.txt
@@ -366,6 +366,57 @@ if (NOT NO_LIB)
         endif()
 
     endif()
+
+    # Expose preprocessor macro to the interface so that client know which feature are enabled
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.0)
+        foreach(osd_target osd_static_cpu osd_static_gpu osd_dynamic_cpu osd_dynamic_gpu osd_static_framework osd_dynamic_framework)
+            if(TARGET ${osd_target})
+                if(CLEW_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_CLEW)
+                endif()
+                if(CUDA_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_CUDA)
+                endif()
+                if(DXSDK_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_DX11SDK)
+                endif()
+                if(METAL_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_METAL)
+                endif()
+                if(OPENCL_CL_D3D11_EXT_H_FOUND OR OPENCL_CL_D3D11_H_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENCL_DX_INTEROP)
+                endif()
+                if(OPENCL_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENCL)
+                endif()
+                if(OPENGL_4_2_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_GLSL_TRANSFORM_FEEDBACK)
+                endif()
+                if(OPENGL_4_3_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_GLSL_COMPUTE)
+                endif()
+                if(NOT NO_OPENGL AND OPENGL_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENGL)
+                endif()
+                if(NOT NO_OPENGL AND OPENGLES_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENGLES)
+                endif()
+                if(OPENMP_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_OPENMP)
+                endif()
+                if(OPENSUBDIV_GREGORY_EVAL_TRUE_DERIVATIVES)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_GREGORY_EVAL_TRUE_DERIVATIVES)
+                endif()
+                if(PTEX_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_PTEX)
+                endif()
+                if(TBB_FOUND)
+                    target_compile_definitions(${osd_target} INTERFACE OPENSUBDIV_HAS_TBB)
+                endif()
+            endif()
+        endforeach()
+    endif()
+
 endif()
 
 #-------------------------------------------------------------------------------