(Emacs)~loads of indenting changes and auto-save changes

Emacs/.config/emacs/config.org

@@ -520,7 +520,6 @@ Some bindings that I couldn't fit elsewhere easily.
   (leader
     "SPC" '(execute-extended-command :which-key "M-x")
     "'"   '(browse-url-emacs :which-key "Open url in Emacs")
-      "u"   'universal-argument
     ";"   'eval-expression
     ":"   `(,(proc (interactive) (switch-to-buffer "*scratch*"))
             :which-key "Switch to *scratch*")
@@ -1118,13 +1117,13 @@ and a Makefile skeleton.
    'auto-insert-alist
    '(("Makefile" . "Makefile skeleton")
      ""
-     "CC=g++
+     "CC=gcc
 CFLAGS=-Wall -ggdb
 OBJECTS=main.o
 OUT=main
 ARGS=
 
-%.o: %.cpp
+%.o: %.c
 	$(CC) $(CFLAGS) -c $^ -o $@
 
 $(OUT): $(OBJECTS)
@@ -1138,6 +1137,7 @@ clean:
 run: $(OUT)
 	./$^ $(ARGS)
 
+
 .PHONY: memcheck
 memcheck: $(OUT)
 	sh /etc/profile.d/debuginfod.sh && valgrind --leak-check=full -s --tool=memcheck ./$^ $(ARGS)"
@@ -2238,7 +2238,7 @@ would be describing changes...
   (setq undo-tree-auto-save-history t)
   :general
   (leader
-    "U" #'undo-tree-visualize))
+    "u" #'undo-tree-visualize))
 #+end_src
 *** Whitespace
 Deleting whitespace, highlighting when going beyond the 80th character
@@ -2372,6 +2372,9 @@ and when I don't.
 #+begin_src emacs-lisp
 (use-package flycheck
   :commands (flycheck-mode flycheck-list-errors)
+  :hook
+  (c-mode-hook   . flycheck-mode)
+  (c++-mode-hook . flycheck-mode)
   :general
   (mode-leader
     "f" #'flycheck-mode)
@@ -2907,6 +2910,13 @@ Setup for C and C++ modes via the cc-mode package.  C and C++ are
 great languages for general purpose programming.  My preferred choice
 when I want greater control over memory management.
 *** cc-mode
+Tons of stuff, namely:
++ ~auto-fill-mode~ for 80 char limit
++ Some keybindings to make evil statement movement is easy
++ Lots of pretty symbols
++ Indenting options and a nice (for me) code style for C (though
+  aggressive indent screws with this a bit)
++ Auto inserts to get a C file going
 #+begin_src emacs-lisp
 (use-package cc-mode
   :defer t
@@ -2954,25 +2964,24 @@ when I want greater control over memory management.
   (setq-default c-default-style '((other . "user")))
 
   (with-eval-after-load "autoinsert"
-    (define-auto-insert
-      '("\\.c\\'" . "C skeleton")
-      '(""
-        "/* " (file-name-nondirectory (buffer-file-name (current-buffer))) "\n"
-        " * Created: " (format-time-string "%Y-%m-%d") "\n"
-        " * Author: " user-full-name "\n"
-        " */\n"
-        "\n"
-        _))
-
-    (define-auto-insert
-      '("\\.cpp\\'" . "C++ skeleton")
+    (let ((skeleton
            '(""
              "/* " (file-name-nondirectory (buffer-file-name (current-buffer))) "\n"
              " * Created: " (format-time-string "%Y-%m-%d") "\n"
              " * Author: " user-full-name "\n"
              " */\n"
+             "#include <stdio.h>\n"
+             "#include <stdlib.h>\n"
+             "#include <malloc.h>\n"
+             "#include <string.h>\n"
              "\n"
              _)))
+      (define-auto-insert
+        '("\\.c\\'" . "C skeleton")
+        skeleton)
+      (define-auto-insert
+        '("\\.cpp\\'" . "C++ skeleton")
+        skeleton)))
   :config
   (c-add-style
    "user"
@@ -3002,22 +3011,24 @@ format [[file:~/Dotfiles/ClangFormat/.clang-format][config file]] in my dotfiles
   :straight nil
   :load-path "/usr/share/clang/"
   :after cc-mode
-  :commands (+code/clang-format-region-or-buffer)
+  :commands (+code/clang-format-region-or-buffer
+             clang-format-mode)
+  :hook
+  (c-mode-hook . clang-format-mode)
+  (c++-mode-hook . clang-format-mode)
   :general
   (code-leader
     :keymaps '(c-mode-map c++-mode-map)
     "f" #'+code/clang-format-region-or-buffer)
   :config
-  (defvar +code/clang-format-automatically t
-    "Automatically call clang-format every time save occurs in C/C++
-buffer")
-
-  (+oreo/create-auto-save
-   (and +code/clang-format-automatically
-        (or (eq major-mode 'c-mode)
-            (eq major-mode 'c++-mode)))
-   (clang-format-buffer))
-
+  (define-minor-mode clang-format-mode
+    "On save formats the current buffer via clang-format."
+    :lighter nil
+    (let ((save-func (proc (interactive)
+                           (clang-format-buffer))))
+      (if clang-format-mode
+          (add-hook 'after-save-hook save-func nil t)
+        (remove-hook 'after-save-hook save-func t))))
   (defun +code/clang-format-region-or-buffer ()
     (interactive)
     (if (mark)
@@ -3268,6 +3279,8 @@ development on Emacs.
    sly-mrepl
    nil)
   :general
+  (shell-leader
+    "s" #'+shell/toggle-sly)
   (nmap
     :keymaps '(lisp-mode-map sly-mrepl-mode-map)
     "gr" #'sly-eval-buffer