Kokoro: Run tests for CMake builds

[ben-clayton]

No description provided.

[ben-clayton]

Tests are failing with:

Testing SPV Debug Information
2,3d1
< error: SPIRV-Tools Validation Errors
< error: Invalid SPIR-V binary version 1.3 for target environment SPIR-V 1.0 (under OpenGL 4.5 semantics).

Which I also observe locally.

[johnkslang]

I randomly checked CI-ubuntu-gcc-cmake-static. It keeps reporting:

../build/install/bin/glslangValidator: error while loading shared libraries: libglslang.so.10

when trying to execute the tests. It earlier said:

CMake Warning (dev) at /bin/cmake-3.17.2/share/cmake-3.17/Modules/GNUInstallDirs.cmake:225 (message):
  Unable to determine default CMAKE_INSTALL_LIBDIR directory because no
  target architecture is known.  Please enable at least one language before
  including GNUInstallDirs.

I see CI-ubuntu-gcc-cmake-static reporting the 1.3 vs. 1.0 thing. The debug block runs 3 tests, and the middle one is indeed making SPIR-V 1.3. Maybe it's telling the validator it made 1.0, and the validator complains? But, I don't see that locally, nor in the last commit to master, so it must also be about something being out of date somewhere.

[ben-clayton]

I randomly checked CI-ubuntu-gcc-cmake-static. It keeps reporting:

You mean CI-ubuntu-gcc-cmake-shared, right? Good spot - I need to set LD_LIBRARY_PATH due to the non-standard install path. Edit: Done

As for the CMAKE_INSTALL_LIBDIR warning - I'll take a look. I vaguely remember this being raised before I started working on the shared libs, but I'll investigate all the same. Edit: See #2339

[ben-clayton]

As for the:

Testing SPV Debug Information
2,3d1
< error: SPIRV-Tools Validation Errors
< error: Invalid SPIR-V binary version 1.3 for target environment SPIR-V 1.0 (under OpenGL 4.5 semantics).

This is failing because these two lines are expected but aren't actually emitted any more. Has something been relaxed recently?

[ben-clayton]

Oh hold on - these Kokoro tests aren't calling update_glslang_sources.py - by not having these in External/, are we disabling validation or something?

[johnkslang]

Yes, if SPIR-V tools are not present, glslang operates anyway, without them, or links to them from another location, which might pick up the wrong version.

[ben-clayton]

Switched to draft due to #2361