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.

通过根据提供的 CMakeLists.txt 生成 VectorAdd Visual Studio 解决方案并在 Windows 上编译 vector-add-buffers.cpp，重现该失败。然后检查第 40–48 行附近的 cl.h 以及 include 设置，以确定为什么 cl_bitfield 被报告为未定义。示例能够在没有这些标识符错误的情况下编译，即表示完成。