[PATCH] Fix cache dir resolving on Windows

[Simon Marchi]

On 2019-06-04 10:44 a.m., Eli Zaretskii wrote:
>> From: orgads@gmail.com
>> Cc: Orgad Shaneh <orgads@gmail.com>
>> Date: Mon,  3 Jun 2019 22:37:16 +0300
>>
>> From: Orgad Shaneh <orgads@gmail.com>
>>
>> ... when not running from MSYS environment, and HOME is not set.
>> ---
>>  gdb/common/pathstuff.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/gdb/common/pathstuff.c b/gdb/common/pathstuff.c
>> index 2b1669a5b9..edb8a1fcda 100644
>> --- a/gdb/common/pathstuff.c
>> +++ b/gdb/common/pathstuff.c
>> @@ -231,6 +231,10 @@ get_standard_cache_dir ()
>>  #endif
>>  
>>    const char *home = getenv ("HOME");
>> +#ifdef _WIN32
>> +  if (home == nullptr)
>> +      home = getenv ("USERPROFILE");
>> +#endif
>>    if (home != NULL)
> 
> This is against the MS platform recommendations regarding "known
> folders", see
> 
>   https://docs.microsoft.com/en-us/windows/desktop/shell/knownfolderid
>   https://docs.microsoft.com/en-us/windows/desktop/shell/csidl
> 
> But maybe we don't care about that.  I know that many applications
> ported from Unix don't.

If it's not too complicated to do The Right Thing (use these  and be a good citizen,
I would prefer that.  But I won't be the one writing the change for Windows
and maintaining it, so I won't force it either.

Simon