-fgnu89-inline is not accepted with -std=clc++

[llvmbot]

Bugzilla Link	46216
Version	trunk
OS	Linux
Reporter	LLVM Bugzilla Contributor
CC	@AnastasiaStulova,@efriedma-quic

Extended Description

While it's possible to use -fgnu89-inline with -std=cl2.0, it's being rejected with -std=clc++ with the following error:

error: invalid argument '-fgnu89-inline' not allowed with 'OpenCL'

[efriedma-quic]

This is intentional. In C++ and C++-based language, we can't reasonably support "-fgnu89-inline"; we always use the C++ inline rules.

Maybe the error message could be improved.

[AnastasiaStulova]

I agree. The error should be about C++, not OpenCL!

[llvmbot]

I see, thanks for the clarification. I guess the title/description can be updated if needed.

[AnastasiaStulova]

Although I imagine we could be less conservative and just give a warning without bailing out. Generally, there are all kinds of incompatible flags that clang ignores withough even providing any diagnostic..