pocl is missing all (public) OpenCL symbols

[Claudio André]

The pocl library available in 18.04 (devel) cannot be used to compile a simple OpenCL program due to missing symbols.

I tested the sample program using 17.10 and Ubuntu devel.
1. I used the same sample program, compiled with the same command line
2. The same packages were installed in both tests (I used docker).
3. To test, I used the first simple OpenCL program from Google.

Example of the failures seen in Ubuntu devel while linking:
  test_version.c:(.text+0x358): undefined reference to `clFinish'

In fact, even a simple check like this fails:
 readelf -Ws /usr/lib/x86_64-linux-gnu/libpocl.so | grep -i clFinish

Ubuntu 17.10
  5266: 0000000000314570 6835 FUNC GLOBAL DEFAULT 12 clFinish

Ubuntu devel
  Nothing

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Since this is not an upstream bug, I'm reporting it here.