[libstdc++, patch] Refer to GNU/Linux in acinclude.m4

[Joseph S. Myers]

On Tue, 1 Nov 2011, Gerald Pfeifer wrote:

> -  # Check for C library flavor since Linux platforms use different configuration
> -  # directories depending on the C library in use.
> +  # Check for C library flavor since GNU/Linux platforms use different
> +  # configuration directories depending on the C library in use.

I think this is a case that is definitely referring to platforms using the 
Linux kernel and not restricted in any way to GNU/Linux platforms (so 
"platforms using the Linux kernel" might be a better description in the 
comment).  It's a comment on tests for uClibc and Bionic, and even if you 
account for some GNU code present in uClibc, Bionic is the C library for 
Android which is the canonical example of a Linux system which is not 
GNU/Linux (no GPL code in userspace) - the test is for whether a Linux 
system is GNU/Linux or not.

-- 
Joseph S. Myers
joseph@codesourcery.com