e566313a1f
`man 3 signal`'s declaration has a face _only a mother could love_. sighandler_t and __sighandler_t are not defined in the C standard, or POSIX. They are helpful typedefs provided by glibc and the Linux kernel UAPI headers respectively since working with function pointers' syntax can be painful. But we should not rely on them; in C++ we have `auto*` and `using` statements. Remove the proxy header, and only include a typedef for sighandler_t when targeting Linux, for compatibility with glibc. Fixes: #125598
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.