================ @@ -31,6 +31,16 @@ option: $ clang -cc1 -include-pch test.h.pch test.c -o test.s +To ignore PCH options using ``clang -cc1``, use the option `-ignore-pch`: ---------------- MaggieYingYi wrote:
I agree that `-include-pch` is ClangOption and CC1Option and is visible to compiler (`clang`) and compiler frontend (`clang -cc1`). However, `-emit-pch` (NOT `-include-pch`) is CC1Option and is only visible to compiler frontend (clang -cc1) as mentioned in my previous reply. For example: If I compile the code using the following command line to check Driver support: ``` $ clang test.h -emit-pch -o test.h.pch ``` I got the following error: ``` clang: error: unknown argument '-emit-pch'; did you mean '-Xclang -emit-pch'? ``` In addition, I found a old PR *https://reviews.llvm.org/D87325) which try to add -emit-pch option to clang driver, but not pass the code review. I am wondering why `-emit-pch` is CC1 only option but `-include-pch` is both ClangOption and CC1Option? https://github.com/llvm/llvm-project/pull/142409 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
