Updating Duktape
  1. Fetch the latest release archive.
  2. Extract it somewhere.
  3. That extracts to a duktape-[VERSION] directory.
  4. We need to tell duktape about our duk_custom.h header:
    1. Change into the duktape-[VERSION] directory.
    2. Run the following command:
      python2 tools/ \
        --output-directory /tmp/output \
        --source-directory src-input \
        --config-metadata config \
        --fixup-line '#include "duk_custom.h"'
    3. This generates a suitable set of duktape sources in /tmp/output
  5. Replace the duktape.c, duktape.h and duk_config.h files in the netsurf source tree (in content/handlers/javascript/duktape) with those generated in /tmp/output.