diff --git a/emacs/c-c++-gtags.el b/emacs/c-c++-gtags.el
index 72fca280..34e724c2 100644
--- a/emacs/c-c++-gtags.el
+++ b/emacs/c-c++-gtags.el
@@ -14,6 +14,7 @@
     (define-key counsel-gtags-mode-map (kbd "M-,") 'counsel-gtags-go-backward)))
 
 (use-package realgud :ensure t :pin melpa)
+(use-package rmsbolt :ensure t :pin melpa)
 
 ;;; flycheck + clang-tidy.
 (use-package flycheck-clang-tidy :ensure t :pin melpa)
@@ -40,6 +41,10 @@
   ;; TODO: (setq flycheck-disabled-checkers '(c/c++-clang c/c++-gcc c/c++-cppcheck))
   ;; TODO: (flycheck-select-checker 'c/c++-clang-tidy)
   (flycheck-c/c++-clang-or-gcc-by-project-build-path)
+  (when (boundp 'project-build-path)
+    (setq-local rmsbolt-command
+                (compile-command-json/rmsbolt-command
+                 project-build-path (buffer-file-name))))
   (flycheck-mode))
 
 (add-hook 'c-mode-local-vars-hook 'my-c-c++-mode-hook2)
@@ -113,6 +118,12 @@
                                           (format "gdb %s" cmd))
                                         #'realgud:gdb))))
 
+(defun c-c++-rmsbolt-this ()
+  (interactive)
+  (rmsbolt-mode)
+  (rmsbolt-compile))
+
+
 ;;;
 (when (fboundp 'general-create-definer)
   (my-local-leader-def :keymaps 'c-mode-base-map
@@ -131,6 +142,7 @@
     "r" '(:ignore t :which-key "run")
     "r r" 'run-executable-by-buffer-name
     "r d" 'debug-executable-by-buffer-name
+    "r b" 'c-c++-rmsbolt-this
     ))
 
 ;;;EOF.
diff --git a/emacs/compile-commands-json.el b/emacs/compile-commands-json.el
index 9636402b..f5ea8848 100644
--- a/emacs/compile-commands-json.el
+++ b/emacs/compile-commands-json.el
@@ -82,6 +82,28 @@ directory listing."
           (ht-set! result-ht inc-dir 1))))
     (ht-keys result-ht)))
 
+(defun compile-command-json/compile-command (build-dir file-name)
+  (interactive)
+  (let* ((fn (f-join build-dir "compile_commands.json"))
+         (file-check? (unless (f-exists? fn)
+                        (error "File not found: %s" fn)))
+         (rows (json-read-file fn))
+         (matching (seq-find (lambda (row) (equal (alist-get 'file row) file-name))
+                             rows)))
+    (alist-get 'command matching)))
+
+(defun compile-command-json/rmsbolt-command (dir-name file-name)
+  (let* ((cmd-parts (remove-if (lambda (s) (or (equal "-c" s)
+                                               (equal file-name s)))
+                               (compile-commands-json/split-shellwords
+                                (compile-command-json/compile-command dir-name file-name))))
+         (pos (seq-position cmd-parts "-o"))
+         (cmd-parts* (seq-partition cmd-parts pos))
+         (cmd-parts** (seq-concatenate 'vector
+                                       (first cmd-parts*)
+                                       (seq-drop (second cmd-parts*) 2))))
+    (s-join " " cmd-parts**)))
+
 
 (provide 'compile-commands-json)
 ;;; compile-commands-json.el ends here