Mac下編譯ffmpeg出現“ERROR: x265 not found using pkg-config”

x265已經編譯成功，但是ffmpeg/configure出現錯誤

　　ERROR: x265 not found using pkg-config

看了一下config.log，出了一坨“Undefined symbols for architecture x86_64” 的錯誤

Undefined symbols for architecture x86_64:
  "vtable for __cxxabiv1::__class_type_info", referenced from:
      ...
  "vtable for __cxxabiv1::__si_class_type_info", referenced from:
      ...
  "vtable for __cxxabiv1::__vmi_class_type_info", referenced from:
　　　 ...
  ...
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ERROR: x265 not found using pkg-config

google 了半天，有些帖子說在x265.pc的“Libs.private:”里添加“-lstdc++”能解決。

- Libs.private: -lto_library -lc++ -ldl
+ Libs.private: -lto_library -lc++ -lstdc++ -ldl

試了一下，確實可以。

 

原來是蘋果對應GNU的libstdc++搞了個自己的libc++，導致Mac下GCC鏈接出了問題。自動化編譯時在腳本里添加一行

export LDFLAGS="${LDFLAGS} -lstdc++"

就好。MAC和linux下都能順利編過。因為Linux上本來就是使用的libstdc++。