158d7b8c23
Summary: This patch fixes some code duplication on the GPU. The GPU build wanted to enable timing for hermetic tests so it built some special case handling into the test suite. Now that `clock` is supported on the target we can simply link against the external interface. Because we include `clock.h` for the CLOCKS_PER_SEC macro we remap the C entrypoint to the internal one if it ends up called. This should allow hermetic tests to run with timing if it is supported.
The LLVM libc unit test framework
This directory contains a lightweight implementation of a gtest like unit test framework for LLVM libc.
Why not gtest?
While gtest is great, featureful and time tested, it uses the C and C++ standard libraries. Hence, using it to test LLVM libc (which is also an implementation of the C standard libraries) causes various kinds of mixup/conflict problems.
How is it different from gtest?
LLVM libc's unit test framework is much less featureful as compared to gtest. But, what is available strives to be exactly like gtest.
Will it be made as featureful as gtest in future?
It is not clear if LLVM libc needs/will need every feature of gtest. We only intend to extend it on an as needed basis. Hence, it might never be as featureful as gtest.