[cfe-users] compiling OpenCL with Clang

Tyler Kenney tjkenney at us.ibm.com
Tue Oct 28 13:32:41 PDT 2014

Hey all,

I'm doing some research into Clang's openCL capabilities and have a few

I'm trying to understand how the -cl-*** command line options defined by
the openCL spec are handled by clang. After tinkering with the command-line
and lots of googling, it looks like the -cl-* flags are only supported if
-cc1 is passed first? Is this correct?

Which brings me to my next question, what specifically does the -cc1 flag
do? I can't find documentation on it. And why are link-time flags after it
treated as an error?

Lastly, all of the flags defined in OCL 1.2 seem to be supported (and by
that I mean, don't throw an error when they're preceded by -cc1, I haven't
actually tested any of the functionality) with the exception of:


Does anyone know the cause for this?

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