[FFmpeg-devel] [PATCH] configure: force _WIN32_WINNT >= 0x0502 on mingw32 targets

[Hendrik Leppkes]

On Fri, Aug 19, 2016 at 10:24 PM, James Almer <jamrial at gmail.com> wrote:
> On 8/19/2016 5:11 PM, Hendrik Leppkes wrote:
>> On Fri, Aug 19, 2016 at 8:39 PM, James Almer <jamrial at gmail.com> wrote:
>>> Windows versions earlier than XP are not supported.
>>>
>>> Should fix compilation of command line tools.
>>>
>>> Signed-off-by: James Almer <jamrial at gmail.com>
>>> ---
>>>  configure | 2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> diff --git a/configure b/configure
>>> index 9b92426..2a2c06e 100755
>>> --- a/configure
>>> +++ b/configure
>>> @@ -4919,6 +4919,8 @@ probe_libc(){
>>>              (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
>>>              die "ERROR: MinGW32 runtime version must be >= 3.15."
>>>          add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
>>> +        check_${pfx}cpp_condition _mingw.h "defined(_WIN32_WINNT) && _WIN32_WINNT >= 0x0502" ||
>>> +            add_${pfx}cppflags -D_WIN32_WINNT=0x0502
>>>          eval test \$${pfx_no_}cc_type = "gcc" &&
>>>              add_${pfx}cppflags -D__printf__=__gnu_printf__
>>>      elif check_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
>>> --
>>> 2.9.1
>>
>> Does that actually work? libav suggested such a patch, but they
>> defined another variable to unlock new functions.
>>
>> - Hendrik
>
> I can't test, i don't have a mingw32 toolchain around. I know it
> will add the extra define to the command line which in theory
> should expose SetDllDirectory().
>
> What did they define? I can't find anything already in configure.

https://lists.libav.org/pipermail/libav-devel/2016-August/078670.html

No clue if its only for things that are CRT features or Windows
features. can't test either.