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[John Criswell <criswell AT illinois.edu>]

On 5/7/12 7:33 AM, Fábio Resner wrote: Hi, 

I'm having trouble using the whole-program analysis features.

When I try to run the

$clang -flto -use-gold-plugin -fmemsafety -o file file1.o file2.o ... -L$PREFIX/lib

command, it gives me the following error message:

/usr/bin/ld: unrecognized option '-plugin'

/usr/bin/ld: use the --help option for usage information

clang: error: linker command failed with exit code 1 (use -v to see invocation)

(Yes I am changing the parameters)

I'm assuming you're on Linux.  Is this correct?

I also checked the clang man page and didn't find any reference to this option.

Am I missing something on the installation?

Yes.  You need to install the Gold linker; some Linux systems come with an older version of ld that isn't based on Gold and, therefore, cannot use the LLVM/SAFECode libLTO plugins.

Directions on compiling and installing these can be found in the LLVM Gold Plugin document at http://llvm.org/docs/GoldPlugin.html.

-- John T.

Thanks,

--
Fabio Resner.

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