(doc native-triple "triple describing the native platform.")
(defdynamic native-triple [(host-arch) (host-os) "unknown"])

(doc target-triple "triple describing the target platform.")
(defndynamic target-triple []
  (let [t (Project.get-config "target")]
    (case t
      "native" native-triple
      (Dynamic.String.split-on "-" t))))

(doc target-arch "target architecture.")
(defdynamic target-arch (car (target-triple)))

(doc target-os "target operating system.")
(defdynamic target-os (cadr (target-triple)))

(doc target-abi "target ABI.")
(defdynamic target-abi (caddr (target-triple)))

(doc target-os? "are we targeting a certain OS?")
(defndynamic target-os? [t]
  (= target-os t))

(doc windows-target? "are we targeting Windows?")
(defdynamic windows-target?
  (if (target-os? "windows")
    true
    (target-os? "mingw32")))

(doc linux-target? "are we targeting Linux?")
(defdynamic linux-target? (target-os? "linux"))

(doc mac-target? "are we targeting Mac?")
(defdynamic mac-target? (target-os? "darwin"))

(doc freebsd-target? "are we targeting FreeBSD?")
(defdynamic freebsd-target? (target-os? "freebsd"))

(doc netbsd-target? "are we targeting NetBSD?")
(defdynamic netbsd-target? (target-os? "netbsd"))

(doc posix-target? "are we targeting a POSIX platform?")
(defdynamic posix-target? (= false windows-target?))

(doc target-only "conditionally compile forms when b is true.")
(defndynamic target-only [b forms]
  (when b
    (eval (cons 'do forms))))

(doc mac-only "compile forms only on Mac.")
(defmacro mac-only [:rest forms]
  (target-only mac-target? forms))

(doc linux-only "compile forms only on Linux.")
(defmacro linux-only [:rest forms]
  (target-only linux-target? forms))

(doc freebsd-only "compile forms only on FreeBSD.")
(defmacro freebsd-only [:rest forms]
  (target-only freebsd-target? forms))

(doc netbsd-only "compile forms only on NetBSD.")
(defmacro netbsd-only [:rest forms]
  (target-only netbsd-target? forms))

(doc windows-only "compile forms only on Windows.")
(defmacro windows-only [:rest forms]
 (target-only windows-target? forms))

(doc posix-only "compile forms only on POSIX targets.")
(defmacro posix-only [:rest forms]
 (target-only posix-target? forms))