identifier "cl_bitfield" is undefined

Summary

I got the above error when I tried to compile "vector-add-buffers.cpp" from the openmp-samples.

Version

2026.1

Environment

Windows

Steps to reproduce

Produce a Visual Studio solution with the supplied CMakeLists.txt of VectorAdd, and try to compile (inside Visual Studio).

Observed behavior

A lot of lines of the type: "identifier "cl_bitfield" is undefined" in cl.h. The first undefined is at cl.h line no. 48.

This is puzzling because cl.h contains the following lines:

40 typedef cl_ulong cl_bitfield;
typedef cl_ulong cl_properties;
typedef cl_bitfield cl_device_type;
typedef cl_uint cl_platform_info;
typedef cl_uint cl_device_info;
typedef cl_bitfield cl_device_fp_config;
typedef cl_uint cl_device_mem_cache_type;
typedef cl_uint cl_device_local_mem_type;
48 typedef cl_bitfield cl_device_exec_capabilities;

That is, "cl_bitfield" is defined before it is used.

Expected behavior

Document behavior you expect.

Reproduce the failure by generating the VectorAdd Visual Studio solution from its supplied CMakeLists.txt and compiling vector-add-buffers.cpp on Windows. Then inspect cl.h around lines 40–48 and the include setup to determine why cl_bitfield is reported undefined. Done means the sample compiles without those identifier errors.