[FFmpeg-trac] #5180(build system:new): build broken on Windows

[FFmpeg]

#5180: build broken on Windows
-------------------------------------+-------------------------------------
             Reporter:  cwalv        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  build        |                  Version:  git-
  system                             |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 $ ./configure
 $ make
 CC  libavdevice/alldevices.o
 alldevices.c
 c:\FFmpeg\libavdevice\alldevices.c : fatal error C1083: Cannot open
 compiler generated file: '/c/FFmpeg/libavdevice/alldevices.o': No such
 file
 or directory
 make: *** [libavdevice/alldevices.o] Error 1
 }}}

 [https://github.com/FFmpeg/FFmpeg/commit/064963bd2702509afee2d2a4ed4eb4b4fd69d9c7
 This commit] breaks the build on Windows.

 As a workaround, I was able to set
 [https://github.com/FFmpeg/FFmpeg/blob/064963bd2702509afee2d2a4ed4eb4b4fd69d9c7/configure#L6254
 DST_PATH=$(pwd)] to the Windows-style path to get the build past this
 error.

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Ticket URL: <https://trac.ffmpeg.org/ticket/5180>
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