[distcc] sanity check for TMPDIR

[Heiko_Elger at arburg.com]

Hi Martin,

some gcc compiler, especially WindRivver System GNU compiler with CYGWIN, cannot
work with the real unix path TMPDIR - but it really works with mixed case path.
mixed case path on cygwin is like the following:

unix path                 /tmp
cygwin path             /tmp or /cygdrive/c/tmp
cygwin mixed path   c:/tmp

Cause of sanity check it's not possible to export a cygwin mixed case path.

Perhaps you can replace the sanity check in dcc_get_tmp_top() in file
src/tempfile.c
with the following - using opendir() call for existeny check:


-------------------- snip snip ----------------------
static const char *dcc_get_tmp_top(void)
{
    const char *d;
    DIR *handle;

    d = getenv("TMPDIR");
    handle=opendir(d);
    if (NULL==handle) {
        return "/tmp";
    } else {
        closedir(handle);
        return d;
    }
}
-------------------- snip snip ----------------------




Mit freundlichen Gruessen
best regards

   Heiko Elger



********************

ARBURG GmbH + Co
Heiko Elger
- Softwareentwicklung - / - Research and Development -
Arthur-Hehl-Strasse
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