This is a copy of LLVM libraries and headers that are used by Hermes.
There's a bug in googletest-1.8.0 when compiling on Windows, with clang,
with exceptions disabled: GTEST_HAS_EXCEPTIONS isn't defined to the correct
value.
Pulled in this fix: https://github.com/google/googletest/commit/3498a1ac52deb83f30b8170c78bfba9dc6227198
from googletest-1.10.0 into googletest-1.8.0.
It only modifies ./utils/unittest/googletest/include/gtest/internal/gtest-port.h
In order to fix some Windows python3 problems, it was necessary to pull in some updates to the LIT testing tool from LLVM.
This was done like so:
git clone https://github.com/llvm/llvm-project.git
cd llvm-project
git checkout release/9.x
cp -r ./llvm/utils/lit/* /path/to/hermes/external/llvh/utils/lit
Some copied files were omitted because we don't use them (like lit self-tests and examples).
The current LLVM 9 release is v9.0.1,
commit hash c1a0a213378a458fbea1a5c77b315c7dce08fd05, from November 27, 2019.
To avoid conflicts when linking with mainline LLVM, the namespace and include directories were
manually renamed to llvh. That left renaming some C public symbols. Unused files under llvh-c/
were removed and lastly a manual rename of the remaining global symbols was performed. The last
step is recorded in patches/rename-c-interface.patch.