steven_wu added a comment.
It is not about matching command line name to builtin marco name. "target" is
the platform we are compiling for, whether it is host or device or something
else. It is a different concept when you talking about cross-compiling, which
"target" is strictly not host and "build" or "host" doesn't matter to compiler
at all.
> #if __is_run(window)
>
> printf("Hello, Satya");
>
> #elif __is_run(darwin)
>
> printf("Hello, Tim");
>
> #else
>
> prinf("Unclear who I am talking too.");
>
> #endif
This example is bad because you do not know about runtime when you do
compilation. Putting runtime environment onto #if is just wrong in many ways.
If autoconf really has to name it to something else, you can always write a
"#define" to rename __is_target.
Repository:
rC Clang
https://reviews.llvm.org/D44753
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