dblaikie added a comment. In https://reviews.llvm.org/D53334#1273877, @whisperity wrote:
> @dblaikie I have created a test, but unfortunately `%clang_cpp` in LIT > invokes `clang --driver-mode=cpp` which is not the same as if `clang++` is > called. I'm trying to construct the following command-line > > `clang++ -fmodules-ts -fprebuilt-module-path=%t/mods --precompile -c > file.cppm -o file.pcm` > > However, using `%clang_cc1` I can't get it to accept `--precompile` as a > valid argument, and using `%clang_cpp` I get an "unused argument" warning for > `--precompile` and the output file is just a preprocessed output (like `-E`), > which will, of course, cause errors, but not the errors I am wanting to test > about. Hey, sorry for the delay - you can use "clang -### <other arguments>" (or "clang++ -### <other arguments>" to get clang to print out the underlying -cc1 command line that is used. If you're changing the driver then we'd write a driver test (that tests that, given "clang -foo -###" it produces some "clang -cc1 -bar" command line to run the frontend. But since you're changing the driver, it's not interesting to (re) test how --precompile is lowered from the driver to cc1. Instead we test the frontend (cc1) directly. Repository: rC Clang https://reviews.llvm.org/D53334 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
