[FFmpeg-devel] [RFC FIX] Build error with ffmpeg 3.1.3 (and current git) on cygwin

[Michael Fritscher]

Hi,

ok, I rephrase it: I have the issue that HAVE_SETDLLDIRECTORY is 
defined, but _WIN32 is not if compiling under cygwin (fresh install, no 
mingw).

SetDllDirectory() is called whenever HAVE_SETDLLDIRECTORY is defined, 
there is no check for _WIN32.

The configure script seems to test windows.h for SetDllDirectory without 
a test of running in a _WIN32 environment:
 > check_func_headers windows.h SetDllDirectory

So cygwin has the situation that the compiler (or the headers) doesn't 
set _WIN32, but have windows.h (c:\cygwin64\usr\include\w32api\windows.h).

Best regards,
Michael Fritscher

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