Mixing macros and code in cljc and supporting clj, cljs and self-hosted cljs, see https://github.com/cgrand/macrovich

core.cljc

;; SEE: https://github.com/cgrand/macrovich

;; macros and code in a single cljc working across clj, cljs and self-hosted cljs
;; require clojurescript from master

(ns foo.core
  #?(:cljs (:require-macros
      [net.cgrand.meta-macros :refer [macros no-macros]]
      [foo.core :refer [add]])
  :clj (:require
      [net.cgrand.meta-macros :refer [macros no-macros]])))

(macros
  (defmacro add
    [a b]
    `(+ ~a ~b)))

(no-macros
  (defn sum
    [a b]
    (add a b)))

meta-macros.cljc

;; SEE: https://github.com/cgrand/macrovich

(ns net.cgrand.meta-macros)

(defmacro macros [& body]
  #?(:cljs
     (when (re-matches #".*\$macros" (name (ns-name *ns*)))
       ; bootstrapped cljojurescript macro
       `(do ~@body))
     :clj ; clj or cljs/jvm
     (when-not (:ns &env)
       `(do ~@body)))) ; clj

(defmacro no-macros [& body]
  #?(:cljs
     (when-not (re-matches #".*\$macros" (name (ns-name *ns*)))
       `(do ~@body)) ; any cljs non-macro
     :clj ; clj or cljs/jvm macro
     `(do ~@body)))