• Sources https://sourceforge.net/projects/fldigi/files/
• GIT repo https://sourceforge.net/p/fldigi/fldigi/ci/master/tree/
• Libs needed :
  • libfltk1.3-compat-headers libfltk1.3-dev
  • libpng-dev
• Check the FLTK version:

  $ fltk-config --version

• Check if sources/config.h is set to the correct values according to FLTK version values :

  /* FLTK API major version */
      #define FLDIGI_FLTK_API_MAJOR 1
      /* FLTK API minor version */
      #define FLDIGI_FLTK_API_MINOR 3
      /* FLTK API patch */
      #define FLDIGI_FLTK_API_PATCH 4

• ./configure
• make

• pyfldigi https://github.com/KM4YRI/pyFldigi

(for packet-radio for example)