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/usr/share/doc/binfmtc/README is in binfmtc 0.17-2.

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To run this program first run
   $ ./configure
   $ make 
   # make install
   # binfmtc-init.sh

You will then be able to run C programs as a script.
Run the following to make sure you have a somewhat working system.

   $ make check 

The C programs need to start with a magic

  /*BINFMTC: (gcc options)

For C++ programs:
  /*BINFMTCXX: (g++ options)