using command-line clang, OS X 10.9.1, Xcode 5.0.2

Question

I'd like to use the -fsanitize=address features of clang.

I'm on:

OS X 10.9.1 with Xcode 5.0.2
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)

I'm running clang from the command line, and I'm getting the error:

clang: error: unsupported argument 'address' to option 'fsanitize='

I'm told this works, but searching around hasn't shown me the way; do I need to bring in a different version of clang?

Thanks!

Sergey K. · Accepted Answer · 2014-02-03 16:17:32Z

2

The out-of-box version of clang on OS X does not implement support of Address Sanitizer. You will have to build your own version of clang from sources.

answered Feb 3, 2014 at 16:17

Sergey K.

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Christopher Ian Stern · Accepted Answer · 2015-05-27 07:15:53Z

1

You need a different build of clang than the one apple gave you. The simplest way to get one (or more) is to install Homebrew http://brew.sh and then

brew install llvm --with-asan

You could also try a prebuilt clang from http://llvm.org/releases/download.htm.
It's by no means impossible to build clang 'by hand', but last I checked it did take multiple checkouts to get the source tree. The other options should have you asaning in minutes.

answered May 27, 2015 at 7:15

Christopher Ian Stern

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1 Comment

Christopher Ian Stern Over a year ago

Update: Apple's Xcode is starting to come with builds of clang that have Address-Sanitizer enabled.

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