Re: [Mingw-users] confused about UTC/timezones on mingw

[Keith M. <kei...@us...>]

On Monday 31 August 2009 12:32:28 Chris Sutcliffe wrote:
> > A few questions:
> >     setenv/unsetenv seems to be in libiberty (is that GPL or
> > free to use in proprietary applications?
>
> What are you trying to do?  Looking in the MinGW headers, setenv /
> unsetenv aren't defined.  Perhaps using Windows functions (i.e.
> SetEnvironmentVariable) may be an option?

Like Chris says, setenv() and unsetenv() are not supported in MinGW, 
because they aren't supported by the MSVCRT runtime library.  The 
usual alternative choice is putenv() -- it's somewhat more portable 
than any Microsoft specific choice;  putenv( "FOO=value" ) is the 
alternative to setenv( "FOO", "value", 1 ), while putenv( "FOO=" ) 
has a rather less portable effect similar to unsetenv( "FOO" ).

-- 

Regards,
Keith.