diff --git a/share/jmk/jmk-flycheck.el b/share/jmk/jmk-flycheck.el
new file mode 100644
index 0000000..8de4949
--- /dev/null
+++ b/share/jmk/jmk-flycheck.el
@@ -0,0 +1,37 @@
+(defun jmk-find-parent-makefile (p)
+  "Find the parent makefile of file P."
+  (let ((path (or p (expand-file-name "."))))
+	(while (not (or (string= path "/")
+					(file-exists-p (concat path "/Makefile"))))
+	  (setq path (expand-file-name (concat path "/.."))))
+	(unless (string= path "/")
+	  (concat path "/Makefile"))))
+
+(defun jmk-find-makefile (p)
+  "Find the makefile for the source file P.
+/a/b/src/hello.c -> /a/b/src/Makefile
+/a/b/include/hello.h -> /a/b/src/Makefile
+Returns nil if nothing can be found"
+  (if-let ((makefile (jmk-find-parent-makefile p)))
+	  makefile
+	(jmk-find-parent-makefile (replace-regexp-in-string
+							   (regexp-quote "include")
+							   "src" p nil 'literal))))
+
+(defun jmk-arguments-for (p)
+  (if-let (path (jmk-find-makefile p))
+	  (split-string (shell-command-to-string
+					 (concat "make -f " path " show_cflags")) " ")
+	nil))
+
+(defun jmk-includes-for (p)
+  (let* ((args (jmk-arguments-for p))
+		 (includes (cl-remove-if-not (lambda (arg)
+									   (string-prefix-p "-I" arg))
+									 args))
+		 (names (mapcar (lambda (arg)
+						  (string-trim (substring arg 2)))
+						includes)))
+	(message "includes: %s" names)
+	names))
+