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[klm@ksuo tmp]$ echo "struct foo { float a, b;};" | chicken-bind - -o -

;;; GENERATED BY CHICKEN-BIND FROM -

(begin
  (define foo-a
    (foreign-lambda* float (((c-pointer (struct "foo")) s)) "return(s->a);"))
  (define foo-b
    (foreign-lambda* float (((c-pointer (struct "foo")) s)) "return(s->b);"))
  (define make-foo
    (foreign-lambda*
      (c-pointer (struct "foo"))
      ((float a) (float b))
      "struct foo *tmp_ = (struct foo *)C_malloc(sizeof(struct foo));\ntmp_->a = a;\ntmp_->b = b;\nC_return(tmp_);")))

;; just for reference, easyffi does the same thing:

[klm@ksuo tmp]$ echo "struct foo {float a, b;}" | chicken-wrap - -to-stdout

;;; generated by chicken-wrap from -

(begin
  (define foo-a
    (foreign-lambda* float (((c-pointer (struct "foo")) s)) "return(s->a);"))
  (define foo-b
    (foreign-lambda* float (((c-pointer (struct "foo")) s)) "return(s->b);"))
  (define make-foo
    (foreign-lambda*
      (c-pointer (struct "foo"))
      ((float a) (float b))
      "struct foo *tmp_ = (struct foo *)C_malloc(sizeof(struct foo));\ntmp_->a = a;\ntmp_->b = b;\nreturn(tmp_);")))