[PATCH] D70378: [LLD][COFF] Cover usage of LLD as a library

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added inline comments.


================
Comment at: lld/ELF/Driver.cpp:895
   const char *argv[] = {config->progName.data(), opt.data()};
+  cl::ResetAllOptionOccurrences();
   if (cl::ParseCommandLineOptions(2, argv, "", &os))
----------------
ayrivera wrote:
> Hi,
> 
> I built locally lld and came across an issue. The ELF driver isn't recognizing multiple -mllvm options. It only process the last -mllvm option that was entered in the command line. For example, I can add -mllvm -print-after-all -debug-pass=Arguments and it only prints the information from -debug-pass=Arguments, and not the IR and the debug data. If I swap the order, then the IR is printed and not the debug information.
> 
> I noticed that this change set added a call to cl:ResetAllOptionOccurrences() (line 895) inside parseClangOption. The function parseClangOption is called inside the loop that process the -mllvm options. If I comment this line, then everything works correctly and I can pass multiple -mllvm options through the command.
> 
> Is this an intended behavior or an actual issue? Thanks for your time.
Hi,

> For example, I can add -mllvm -print-after-all -debug-pass=Arguments

You need two -mllvm, i.e. `-mllvm -print-after-all -mllvm -debug-pass=Arguments`. And with the option, I see the print-after-all dump.


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  https://reviews.llvm.org/D70378/new/

https://reviews.llvm.org/D70378