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Nico Weber 1335b1046c lit: Let lit.util.which() return a normcase()ed path LLVMConfig.with_environment() uses os.path.normcase(os.path.normpath(x)) to normalize temporary env vars. LLVMConfig.use_clang() uses with_environment() to temporarily set PATH and then look for clang there. This means that on Windows, clang will be run with a path like c:\foo\bin\clang.EXE (with a lower-case "C:"). lit.util.which() used to not do this, which means the executables added in clang/test/lit.cfg.py (e.g. c-index-test) were run with a path like C:\foo\bin\c-index-test.EXE (because both CMake and GN happen to write clang_tools_dir with an upper-case C to lit.site.cfg.py). clang/test/Index/pch-from-libclang.c requires that both c-index-test and clang use _exactly_ the same resource dir path (same case and everything), because a hash of the resource directory is used as module cache path. This patch is necessary but not sufficient to make pch-from-libclang.c pass on Windows. Differential Revision: https://reviews.llvm.org/D57343 llvm-svn: 352704		2019-01-31 00:40:43 +00:00
..
examples	Fix lit/example/many-tests pickling issue	2018-09-14 19:44:09 +00:00
lit	lit: Let lit.util.which() return a normcase()ed path	2019-01-31 00:40:43 +00:00
tests	make XFAIL, REQUIRES, and UNSUPPORTED support multi-line expressions	2019-01-20 00:51:02 +00:00
utils
CMakeLists.txt
lit.py
MANIFEST.in	lit: Make sure the builtin_commands directory is packaged by setup.py	2018-09-26 14:56:11 +00:00
README.txt
setup.py	Adjust documentation for git migration.	2019-01-29 16:37:27 +00:00

README.txt

===============================
 lit - A Software Testing Tool
===============================

lit is a portable tool for executing LLVM and Clang style test suites,
summarizing their results, and providing indication of failures. lit is designed
to be a lightweight testing tool with as simple a user interface as possible.

=====================
 Contributing to lit
=====================

Please browse the Test Suite > lit category in LLVM's Bugzilla for ideas on
what to work on.

Before submitting patches, run the test suite to ensure nothing has regressed:

    # From within your LLVM source directory.
    utils/lit/lit.py \
        --path /path/to/your/llvm/build/bin \
        utils/lit/tests

Note that lit's tests depend on 'not' and 'FileCheck', LLVM utilities.
You will need to have built LLVM tools in order to run lit's test suite
successfully.

You'll also want to confirm that lit continues to work when testing LLVM.
Follow the instructions in http://llvm.org/docs/TestingGuide.html to run the
regression test suite:

    make check-llvm

And be sure to run the llvm-lit wrapper script as well:

    /path/to/your/llvm/build/bin/llvm-lit utils/lit/tests

Finally, make sure lit works when installed via setuptools:

    python utils/lit/setup.py install
    lit --path /path/to/your/llvm/build/bin utils/lit/tests