[OptiX not found problem] CMakeLists.txt is not compatible with FindOptiX.cmake within OptiX package.

[somisawa]

Question: Was my way correct? Or do there exist other solutions you suppose?

Environment: Ubuntu 20.04
Objective package: OptiX™ SDK 7.4.0 downloaded from here.

In this part, you use find_package but path/to/NVIDIA-OptiX-SDK-7.4.0-linux64-x86_64/SDK/CMake/FindOptiX.cmake does not set OptiX_FOUND even if optix.h exists in OptiX_INSTALL_DIR or OptiX_INSTALL_DIR/include.

instant-ngp/CMakeLists.txt

Lines 162 to 174 in 06ee0a2

	find_package(OptiX)
	# set OptiX_INSTALL_DIR via your environment if it's not found automatically
	if (OptiX_FOUND)
	include_directories("${OptiX_INCLUDE}")
	add_definitions(-DNGP_OPTIX)
	else()
	message(WARNING
	"OptiX was not found. Neural graphics primitives will still compile "
	"and run correctly. However, SDF training in 'raystab' and 'pathescape' "
	"modes will be significantly slower."
	)
	endif()

I've solved this problem by adding the following code at the end of path/to/NVIDIA-OptiX-SDK-7.4.0-linux64-x86_64/SDK/CMake/FindOptiX.cmake so that find_package correctly set OptiX_FOUND.

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(OptiX
  REQUIRED_VARS
    OptiX_INCLUDE
  )

if(OptiX_FOUND AND NOT TARGET OptiX::OptiX)
  add_library(OptiX::OptiX UNKNOWN IMPORTED)
  set_target_properties(OptiX::OptiX PROPERTIES
    INTERFACE_INCLUDE_DIRECTORIES "${OptiX_INCLUDE}"
    )
endif()

[Tom94]

Apologies for this, I had forgotten to include the relevant cmake/FindOptiX.cmake file in this repository and only remedied the issue 2 hours ago. (see 8bd9ff4)

OptiX should now be found out-of-the-box (assuming OptiX_INSTALL_DIR is set)

[somisawa]

Oh, I missed your recent update. Thank you so much for fixing. I will close this issue.