Unresolved External Error __imp__OrtGetApiBase@0

[matt256]

Hoping to get some advice on what I'm assuming is a simple issue. I keep getting the following error when trying to set up an inference in C++.

error LNK2019: unresolved external symbol __imp__OrtGetApiBase@0 referenced in function _main

Looking in the tests and samples, I narrowed it down to just the simple case below.

#include <iostream>
#include <onnxruntime_cxx_api.h>

int main()
{
	OrtGetApiBase();
	return 0; 
}

I feel like this is simple but can't seem to find a solution for it.
Windows 10. VS2019 compiler via cmake.
From the CMakeLists.txt:

include_directories("${ONNXRUNTIME_ROOTDIR}/include" "${ONNXRUNTIME_ROOTDIR}/include/onnxruntime/core/session")
link_directories("${ONNXRUNTIME_ROOTDIR}/build/Windows/RelWithDebInfo/RelWithDebInfo")

In the ONNXRuntime samples the link directory was ${ONNXRUNTIME_ROOTDIR}/lib but that folder didn't exist. Am I looking in the wrong spot for that?

The __imp__OrtGetApiBase@0 looked like some name mangling but the header file says extern so... idk.

Any thoughts would be greatly appreciated. Thank you in advance

[matt256]

update:
As I thought it may have been, I was having build issues where I was improperly linking the onnxruntime.lib file. It works now. The below is a revision to the part of the CMakeLists file referenced above:

include_directories("${ONNXRUNTIME_ROOTDIR}include" "${ONNXRUNTIME_ROOTDIR}/include/onnxruntime/core/session","${ONNXRUNTIME_ROOTDIR}/build/Windows/RelWithDebInfo/RelWithDebInfo")
target_link_libraries(MyExample "${ONNXRUNTIME_ROOTDIR}/build/Windows/RelWithDebInfo/RelWithDebInfo/onnxruntime.lib")

I actually tried to just delete this thread because it was more of a novice C++ issue rather than an ONNX issue. I suppose that's up to the moderators.