macOS-10-15编译ffmpeg运行crash

最近将mac本的系统升级为macOS10.15，xcode升级为11，回头发现重新编译出来的ffmpeg运行时会崩溃，而之前编译的运行没有问题。

现象：

./configure
make

编译成功后，执行./ffmpeg，出现crash

[1]    85565 segmentation fault  ./ffmpeg

调试信息

ffmpeg git:(master) lldb ffmpeg_g
(lldb) target create "ffmpeg_g"
Current executable set to 'ffmpeg_g' (x86_64).
(lldb) r
Process 85587 launched: '/Users/mayudong/code/ffmpeg/ffmpeg_g' (x86_64)
Process 85587 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
    frame #0: 0x00007fff70a12476 libdyld.dylib`stack_not_16_byte_aligned_error
libdyld.dylib`stack_not_16_byte_aligned_error:
->  0x7fff70a12476 <+0>: movdqa %xmm0, (%rsp)
    0x7fff70a1247b <+5>: int3   
    0x7fff70a1247c <+6>: nop    
    0x7fff70a1247d <+7>: nop    
Target 0: (ffmpeg_g) stopped.
(lldb) 

解决方案
执行configure时增加--extra-cflags="-fno-stack-check"参数
原因是xcode11升级时将clang默认打开了-fstack-check
参考：https://trac.ffmpeg.org/ticket/8073