| # This file defines a template for adding a unittest binary. |
| # |
| # It's a thin wrapper around GN's built-in executable() target type and |
| # accepts the same parameters, and in addition this paramater: |
| # |
| # has_custom_main (optional) |
| # [bool] If set, link against gtest instead of UnitTestMain; for tests |
| # that define their own main() function. |
| # |
| # Example use: |
| # |
| # unittest("FormatTest") { |
| # sources = [ ... ] |
| # ... |
| # } |
| |
| template("unittest") { |
| executable(target_name) { |
| has_custom_main = false # Default value. |
| |
| # Foward everything (has_custom_main if set; configs, sources, deps, ...). |
| forward_variables_from(invoker, "*") |
| assert(!defined(invoker.output_dir), "cannot set unittest output_dir") |
| assert(!defined(invoker.testonly), "cannot set unittest testonly") |
| |
| # Common settings for all unit tests. |
| # Unit test binaries shouldn't go right in out/gn/bin, for two reasons: |
| # 1. That's where production binaries go. |
| # 2. The CMake build doesn't put the unit tests of all projects (clang, |
| # lld,...) in one directory, so it's not guaranteed that there won't |
| # be name collisions between test binaries from separate projects. |
| # Each lit suite takes an foo_obj_root parameter and puts temporary files |
| # for lit tests at foo_obj_root/test and looks for unit test binaries |
| # below foo_obj_root/unittests. As long as the BUILD.gn files processing |
| # the lit.site.cfg.py.in files match the output dir here, it doesn't |
| # matter all that much where the unit test binaries go, with the weak |
| # constraints that test binaries of different projects should go in |
| # different folders, and that it's not too difficult to manually |
| # run the unit test binary if necessary. Using target_out_dir here |
| # means that //clang/unittests/Format gets its binary in |
| # out/gn/obj/clang/unittests/Format/FormatTests, which seems fine. |
| # |
| # If you change output_dir here, look through |
| # `git grep target_out_dir '*/unittests/*'` and update those too. |
| output_dir = target_out_dir |
| |
| if (has_custom_main) { |
| deps += [ "//llvm/utils/unittest:gtest" ] |
| } else { |
| deps += [ "//llvm/utils/unittest/UnitTestMain" ] |
| } |
| testonly = true |
| } |
| } |
| |
| set_defaults("unittest") { |
| configs = shared_binary_target_configs |
| } |