/usr/include/clc/clcversion.h is in libclc-dev 0.2.0+git20160907-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #if __OPENCL_VERSION__ >= 110
#define CLC_VERSION_1_0 100
#define CLC_VERSION_1_1 110
#endif
#if __OPENCL_VERSION__ >= 120
#define CLC_VERSION_1_2 120
#endif
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