"osx" please install the libcurl development files or specify --curl-config
Related code examples
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Building without Cython. Error: Please make sure the libxml2 and libxslt development packages are installed.
Unable to locate a development device; please run 'flutter doctor' for information about installing additional components.
If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvDestroyAllWindows'