我在使用 MinGw 在 Windows 上构建 MLT 框架时遇到了一些问题。我尝试按照http://www.mltframework.org/bin/view/MLT/WindowsBuild上的说明进行操作。我完成了每个步骤，直到称为“构建”的步骤。这是“构建”章节的第 7 步产生的结果：
$ ./configure --prefix=$HOME/build --enable-gpl --disable-decklink
Configuring framework:
Configuring modules:
Configuring modules/avformat:
- libavformat not found: disabling
Configuring modules/core:
Configuring modules/dv:
- libdv not found: disabling
Configuring modules/feeds:
Configuring modules/frei0r:
Package frei0r was not found in the pkg-config search path.
Perhaps you should add the directory containing `frei0r.pc'
to the PKG_CONFIG_PATH environment variable
No package 'frei0r' found
Configuring modules/gtk2:
- GTK2 components not found: disabling
Configuring modules/jackrack:
- jackrack not found: disabling
- xml2 not found: disabling jackrack
- ladspa not found; disabling
Configuring modules/kdenlive:
Configuring modules/kino:
- does not build on OS X or Windows: disabling
Configuring modules/linsys:
- does not build on OS X or Windows: disabling
Configuring modules/lumas:
Configuring modules/motion_est:
Configuring modules/normalize:
Configuring modules/oldfilm:
Configuring modules/opengl:
- movit not found: disabling
Configuring modules/plus:
Configuring modules/plusgpl:
Configuring modules/qt:
- Qt not found - disabling
./configure: line 150: kde4-config: command not found
Configuring modules/resample:
- libsamplerate not found: disabling
Configuring modules/rtaudio:
Configuring modules/sdl:
Configuring modules/sox:
- sox not found: disabling
Configuring modules/swfdec:
- swfdec not found: disabling
Configuring modules/vid.stab:
- vid.stab not found: disabling
Configuring modules/videostab:
Configuring modules/vmfx:
Configuring modules/vorbis:
- ogg vorbis not found: disabling
Configuring modules/xine:
Configuring modules/xml:
- xml2 not found: disabling xml module
Configuring mlt++:
Configuring swig:
GPLv2 license used; GPLv3 components disabled
看起来即使在配置阶段也缺少一些库，但我不确定这些缺少的库是否是关键任务......
当尝试执行名为“make all install”的第 8 个“构建”步骤时，构建失败并且 MinGw 吐出错误：
C:\MinGW\msys\1.0\home\Benas\src\mlt\src\framework/mlt_repository.c:101: undefined reference to `dlsym'
C:\MinGW\msys\1.0\home\Benas\src\mlt\src\framework/mlt_repository.c:109: undefined reference to `dlclose'
C:\MinGW\msys\1.0\home\Benas\src\mlt\src\framework/mlt_repository.c:97: undefined reference to `dlopen'
C:\MinGW\msys\1.0\home\Benas\src\mlt\src\framework/mlt_repository.c:118: undefined reference to `dlerror'
C:\MinGW\msys\1.0\home\Benas\src\mlt\src\framework/mlt_repository.c:113: undefined reference to `dlclose'
collect2.exe: error: ld returned 1 exit status
make[1]: *** [libmlt-6.dll] Error 1
make[1]: Leaving directory `/home/Benas/src/mlt/src/framework'
make: *** [all] Error 1
这一定是因为编译器找不到 dlfcn.dll。我已经完成了教程中的“dlfcn-win32”步骤，并且可以在 C:\MinGW\bin 和 C:\MinGW\msys\1.0\home\Benas\build 上找到该库。我想知道为什么编译器看不到它，有什么办法可以让它工作吗？