[cfe-dev] Parse custom options using CommonOptionsParser

[Christoph Viebig (lists)]

Oh, thank you for your fast response. I actually did not came up with the idea
to put my option before the --.
This works, thank you!

> Manasij Mukherjee <manasij7479 at gmail.com> hat am 21. Januar 2015 um 12:17
> geschrieben:
> 
>  Hi
>  Your code seems to work fine, what is your clang version?
>  Can you elaborate the problem ?
> 
>  > Also the category needs to be applied
>  on the new option, otherwise it's not shown in the help.
> 
>  That seems to be by design.
> 
>  Examples of invocation:
>  $ ./bin/testtool ~/b.cpp -abc=1 -- -std=c++11
>  1
> 
>  $ ./bin/testtool --help
>  <snip>
>  My tool options:
> 
>  -abc -
>  <snip>
> 
> 
> 
>  On Wed, Jan 21, 2015 at 3:41 PM, Christoph Viebig (lists)
> <lists at christoph-viebig.de <mailto:lists at christoph-viebig.de> > wrote:
>    > > Hello list,
> > 
> >    I am currently working on a libTooling project and need to read custom
> >    command line options for this.
> > 
> >    Unfortunately I was not able to get the following sample code from
> >    CommonOptionsParser [1] to run. Can you please give me an advice what
> >    might be the problem here?
> > 
> >    To make the sample code compiling I had to add the import of Tooling.h
> >    and modify the Tool.run() call to retrieve the Front-end action via
> >    .get() from the factory first. Also the category needs to be applied
> >    on the new option, otherwise it's not shown in the help.
> > 
> >    #include "clang/Frontend/FrontendActions.h"
> >    #include "clang/Tooling/CommonOptionsParser.h"
> >    #include "clang/Tooling/Tooling.h"
> >    #include "llvm/Support/CommandLine.h"
> > 
> >    using namespace clang::tooling;
> >    using namespace llvm;
> > 
> >    static cl::OptionCategory MyToolCategory("My tool options");
> >    static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
> >    static cl::extrahelp MoreHelp("\nMore help text...");
> >    static cl::opt<bool> YourOwnOption("abc", cl::cat(MyToolCategory));
> > 
> >    int main(int argc, const char **argv) {
> >    CommonOptionsParser OptionsParser(argc, argv, MyToolCategory);
> >    ClangTool Tool(OptionsParser.getCompilations(),
> >    OptionsParser.getSourcePathList());
> >    llvm::outs() << YourOwnOption.getValue();
> >    return
> > Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>().get());
> >    }
> > 
> >    Thank you very much in advance!
> > 
> >    Best regards
> >    Christoph
> > 
> >    [1]
> > 
> >   http://clang.llvm.org/doxygen/classclang_1_1tooling_1_1CommonOptionsParser.html
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