[GRASS-dev] db_start_driver without window

[Radim Blazek]

On Thu, Oct 15, 2015 at 9:00 AM, Markus Neteler <neteler at osgeo.org> wrote:
> On Wed, Oct 14, 2015 at 7:39 PM, Radim Blazek <radim.blazek at gmail.com> wrote:
>> When a driver is started from QGIS on Windows using db_start_driver ->
>> G_spawn_ex -> do_spawn -> win_spawn > CreateProcess, it opens black
>> window.
>>
>> Is there a possibility to prevent opening that window by setting some
>> global Windows param before db_start_driver is called? If not, would
>> it be possible to prevent it by giving
>> CREATE_NO_WINDOW (or something like that) as dwCreationFlags to
>> CreateProcess in win_spawn?
>
> At time I see the 0 hardcoded in the function all in
> lib/gis/spawn.c
>
> static int win_spawn(const char *cmd, const char **argv, const char **envp,
>     const char *cwd, HANDLE handles[3], int background,
>     int shell)
> [...]
>  result = CreateProcess(
>   program, /* lpApplicationName */
>   args, /* lpCommandLine */
>   NULL, /* lpProcessAttributes */
>   NULL, /* lpThreadAttributes */
>   1, /* bInheritHandles */
>   0, /* dwCreationFlags */
>   env, /* lpEnvironment */
>   cwd, /* lpCurrentDirectory */
>   &si, /* lpStartupInfo */
>   &pi /* lpProcessInformation */
> );
>
> @devs: related documentation:
> https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx
> --> therein page ref with the of "Process Creation Flags"
>     --> CREATE_NO_WINDOW
>
> Did you try and this works then?

Not yet, I was not able to compile GRASS, it cannot find various
dependencies (zlib, regex, proj...) even if dev packages are
installed. I'll try again and post the problems.

Radim