I am trying to redirect the output emitted when running a tool through clang::tooling::runToolOnCode() to a buffer or string instead of stderr (llvm::errs()). I’m using clangTooling from release 3.9.
When looking at clangTooling code and following the execution flow, I have found the following:
which calls clang::tooling::ToolInvocation::run()
which contains the following :
TextDiagnosticPrinter DiagnosticPrinter(llvm::errs(), &*DiagOpts);
IntrusiveRefCntPtrclang::DiagnosticIDs(new DiagnosticIDs()), &*DiagOpts,
DiagConsumer ? DiagConsumer : &DiagnosticPrinter, false);
So at this point I guess I’m stuck because everything is redirected to stderr…
Did I miss something or is there really this limitation?
I also thought of redirecting stderr to somewhere else but… I can’t see how it will fit my needs as in the end I want to call clang::tooling::runToolOnCode() on different files in parallel, all of it in the same process ; so I’ll get stderr mixed with output from several executions. The best solution would obviously being able to provide the DiagnosticConsumer but at the moment everything looks hardcoded.