HEADS UP: getenv() and family API change

[Andrey Chernov]

On Sun, Jul 08, 2007 at 04:13:49PM +0200, Dirk Meyer wrote:
> Hallo Sean C. Farley,
> 
> > Changes in moving to POSIX from historic BSD API:
> >    b. putenv takes a char * instead of const char *.
> >    c. putenv no longer makes a copy of the input string.
> 
> Can you give more details?
> 

See POSIX description
http://www.opengroup.org/onlinepubs/009695399/functions/putenv.html

> An application will break in using this:
> putenv("PATH=/bin")
> 
> now taking a char *, this will break with gcc42.

No break, this is illegal call (because this const _contents_ may be 
changed with the yet one putenv call).

Why do you think gcc uses
tlink.c: putenv (xstrdup ("COMPILER_PATH="));
in its own internal code? (like many others)

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