Re: [PATCH] Fix build breakage on MinGW due to missing setenv

[Sergio Durigan Junior <sergiodj@redhat.com>]

On Monday, July 03 2017, Yao Qi wrote:

> On Mon, Jul 3, 2017 at 11:02 AM, Anton Kolesov
> <Anton.Kolesov@synopsys.com> wrote:
>> Patch [1] broke a build on MinGW hosts, because MinGW doesn't provide POSIX
>> functions setenv () and unsetenv (), instead there is a putenv () wrapper
>> around WinAPI function, although with a different signature.
>>
>> [1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=9a6c7d9c0
>
> The better fix, IMO, is to use setenv and unsetenv
> module in gnulib.  However, I didn't check gnulib
> manual about portability problems not fixed by gnulib.

According to:

  <https://www.gnu.org/software/gnulib/manual/html_node/setenv.html#setenv>

There is only one portability problem not fixed by gnulib, and I don't
think it affects us:

  Older versions of POSIX required that setenv(NULL,"",0) gracefully
  fail with EINVAL, but not all implementations guarantee this, and the
  requirement was removed.

So it should be possible to import setenv from gnulib without problems,
I think.

Cheers,

-- 
Sergio
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