241c290ad7
In mingw mode, all linker paths are passed explicitly to the linker by the compiler driver. Don't try to implicitly add linker paths from the LIB environment variable or by detecting an MSVC installation directory. If the /winsysroot command line parameter is explicitly passed to lld-link while /lldmingw is specified, it could be considered reasonable to actually include those paths. However, modifying the code to handle only the /winsysroot case but not the other ones, when the mingw mode has been enabled, seems like much more code complexity for a mostly hypothetical case. Add a test for this when case when using LIB. (The code paths for trying to detect an MSVC installation aren't really regression tested.) Also fix an issue in the existing test for "Check that when /winsysroot is specified, %LIB% is ignored.", where the LIB variable pointed to a nonexistent directory, so the test would pass even if /winsysroot wouldn't be specified. Reland this after https://github.com/llvm/llvm-project/pull/68077 and https://github.com/llvm/llvm-project/pull/69781 - the compiler-rt test that used -lldmingw in MSVC environments has been updated to use a more specific option. Differential Revision: https://reviews.llvm.org/D144084
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.