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

[James Almer]

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.