csc -verbose -c++ -X easyffi ../

/usr/local/bin/chicken ../source/testffi.scm -output-file ../source/testffi.cpp -quiet -verbose -extend easyffi
Loading compiler extensions...
; loading /usr/local/lib/chicken/3/easyffi.so ...
debugging info: stacktrace
pass: source
; loading /usr/local/lib/chicken/3/tinyclos.scm ...
Error: during expansion of (foreign-parse ...) - can not open include file: "myheader.h"

        Call history:

        <syntax>                (begin (##core#undefined))
        <syntax>                (##core#undefined)
        <syntax>                (foreign-parse "\n#include \"myheader.h\"\n")
        <eval>          (append strs (quote ("\n")))
        <eval>          (every string? strs)
        <eval>          (##sys#cons (quote begin) (parse-easy-ffi (string-concatenate strs)))
        <eval>          (parse-easy-ffi (string-concatenate strs))
        <eval>          (string-concatenate strs)       <--
*** Shell command terminated with exit status 1: /usr/local/bin/chicken ../source/testffi.scm -output-file ../source/testffi.cpp -quiet -verbose -extend easyffi