Global Definition Vs Global Declaration

[Ian Lance Taylor]

zahed khurasani <sdzahed@gmail.com> writes:

> How can I distinguish between the following two declarations (both
> appear outside any function at file scope)?
>
> extern int i;
> int i;
>
> Both show up as VAR_DECL nodes in the BLOCK_VARS of the
> TRANSLATION_UNIT_DECL. Moreover, both return true for DECL_EXTERNAL. I
> need a way to say which is which in my plugin code.

I assume this is C, not C++, and that you are not using the -fno-common
option.  The "int i;" will be DECL_COMMON.

Ian