diff --git a/runtime/compiler/ant.vim b/runtime/compiler/ant.vim
index 0605c69..6219b01 100644
--- a/runtime/compiler/ant.vim
+++ b/runtime/compiler/ant.vim
@@ -2,16 +2,13 @@
 " Compiler:	ant
 " Maintainer:	Johannes Zellner <johannes@zellner.org>
 " Last Change:	Mi, 13 Apr 2005 22:50:07 CEST
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
     finish
 endif
 let current_compiler = "ant"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/bcc.vim b/runtime/compiler/bcc.vim
index 5bd284a..2d9d4fb 100644
--- a/runtime/compiler/bcc.vim
+++ b/runtime/compiler/bcc.vim
@@ -2,16 +2,13 @@
 " Compiler:		bcc - Borland C
 " Maintainer:	Emile van Raaij (eraaij@xs4all.nl)
 " Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "bcc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " A workable errorformat for Borland C
 CompilerSet errorformat=%*[^0-9]%n\ %f\ %l:\ %m
 
diff --git a/runtime/compiler/bdf.vim b/runtime/compiler/bdf.vim
index 7e08cdd..2aaa93b 100644
--- a/runtime/compiler/bdf.vim
+++ b/runtime/compiler/bdf.vim
@@ -3,6 +3,7 @@
 " Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
 " Contributors:         Enno Nagel
 " Last Change:          2024 Mar 29
+"                       2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -12,10 +13,6 @@
 let s:cpo_save = &cpo
 set cpo-=C
 
-if exists(":CompilerSet") != 2 " Older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=bdftopcf\ $*
 CompilerSet errorformat=%ABDF\ %trror\ on\ line\ %l:\ %m,
       \%-Z%p^,
diff --git a/runtime/compiler/cargo.vim b/runtime/compiler/cargo.vim
index aa9b01e..cae2e51 100644
--- a/runtime/compiler/cargo.vim
+++ b/runtime/compiler/cargo.vim
@@ -2,6 +2,7 @@
 " Compiler:         Cargo Compiler
 " Maintainer:       Damien Radtke <damienradtke@gmail.com>
 " Latest Revision:  2023-09-11
+"                   2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " For bugs, patches and license go to https://github.com/rust-lang/rust.vim
 
 if exists('current_compiler')
diff --git a/runtime/compiler/checkstyle.vim b/runtime/compiler/checkstyle.vim
index 4ebd9e1..3c17ee4 100644
--- a/runtime/compiler/checkstyle.vim
+++ b/runtime/compiler/checkstyle.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Checkstyle
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Aug 2
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "checkstyle"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/cm3.vim b/runtime/compiler/cm3.vim
index 3de5128..0ec3608 100644
--- a/runtime/compiler/cm3.vim
+++ b/runtime/compiler/cm3.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Critical Mass Modula-3 Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2021 Apr 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "cm3"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/context.vim b/runtime/compiler/context.vim
index 512f81c..093943e 100644
--- a/runtime/compiler/context.vim
+++ b/runtime/compiler/context.vim
@@ -5,6 +5,7 @@
 # Former Maintainers: Nikolai Weibull <now@bitwi.se>
 # Contributors:       Enno Nagel
 # Last Change:        2024 Mar 29
+#                     2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("g:current_compiler")
   finish
@@ -12,10 +13,6 @@
 
 import autoload '../autoload/context.vim'
 
-if exists(":CompilerSet") != 2 # Older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 g:current_compiler = 'context'
 
 if get(b:, 'context_ignore_makefile', get(g:, 'context_ignore_makefile', 0)) ||
diff --git a/runtime/compiler/cs.vim b/runtime/compiler/cs.vim
index 4f6dd3c..123dff8 100644
--- a/runtime/compiler/cs.vim
+++ b/runtime/compiler/cs.vim
@@ -3,6 +3,7 @@
 " Maintainer:             Yichao Zhou (broken.zhou@gmail.com)
 " Previous Maintainer:    Joseph H. Yao (hyao@sina.com)
 " Last Change:            Jul 22, 2019
+"                         2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -11,10 +12,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat&
 CompilerSet errorformat+=%f(%l\\,%v):\ %t%*[^:]:\ %m,
             \%trror%*[^:]:\ %m,
diff --git a/runtime/compiler/csslint.vim b/runtime/compiler/csslint.vim
index 14c4289..608cc74 100644
--- a/runtime/compiler/csslint.vim
+++ b/runtime/compiler/csslint.vim
@@ -1,16 +1,13 @@
 " Vim compiler file
 " Compiler:	csslint for CSS
-" Maintainer: Daniel Moch <daniel@danielmoch.com>
-" Last Change: 2016 May 21
+" Maintainer:	Daniel Moch <daniel@danielmoch.com>
+" Last Change:	2016 May 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "csslint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=csslint\ --format=compact
 CompilerSet errorformat=%-G,%-G%f:\ lint\ free!,%f:\ line\ %l\\,\ col\ %c\\,\ %trror\ -\ %m,%f:\ line\ %l\\,\ col\ %c\\,\ %tarning\ -\ %m,%f:\ line\ %l\\,\ col\ %c\\,\ %m
diff --git a/runtime/compiler/cucumber.vim b/runtime/compiler/cucumber.vim
index 17ce362..8089a5e 100644
--- a/runtime/compiler/cucumber.vim
+++ b/runtime/compiler/cucumber.vim
@@ -2,16 +2,13 @@
 " Compiler:	Cucumber
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Last Change:	2016 Aug 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "cucumber"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/dart.vim b/runtime/compiler/dart.vim
index f9ebfe1..9577236 100644
--- a/runtime/compiler/dart.vim
+++ b/runtime/compiler/dart.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart VM
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dart"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dart2js.vim b/runtime/compiler/dart2js.vim
index b6a4e4d..a05dead 100644
--- a/runtime/compiler/dart2js.vim
+++ b/runtime/compiler/dart2js.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart to JavaScript Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dart2js"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dart2native.vim b/runtime/compiler/dart2native.vim
index 51bdab0..6604fc4 100644
--- a/runtime/compiler/dart2native.vim
+++ b/runtime/compiler/dart2native.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart to Native Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dart2native"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dartanalyser.vim b/runtime/compiler/dartanalyser.vim
index e691d80..48a976a 100644
--- a/runtime/compiler/dartanalyser.vim
+++ b/runtime/compiler/dartanalyser.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart Analyzer
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dartanalyzer"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dartdevc.vim b/runtime/compiler/dartdevc.vim
index e8d1988..16e4ed7 100644
--- a/runtime/compiler/dartdevc.vim
+++ b/runtime/compiler/dartdevc.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart Development Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dartdevc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dartdoc.vim b/runtime/compiler/dartdoc.vim
index 26b38d8..78f0d24 100644
--- a/runtime/compiler/dartdoc.vim
+++ b/runtime/compiler/dartdoc.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart Documentation Generator
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dartdoc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dartfmt.vim b/runtime/compiler/dartfmt.vim
index 2e4ab02..d204df8 100644
--- a/runtime/compiler/dartfmt.vim
+++ b/runtime/compiler/dartfmt.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart Formatter
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dartfmt"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/decada.vim b/runtime/compiler/decada.vim
index 0bf5487..11b0cb4 100644
--- a/runtime/compiler/decada.vim
+++ b/runtime/compiler/decada.vim
@@ -14,6 +14,7 @@
 "               08.09.2006 MK Correct double load protection.
 "    Help Page: compiler-decada
 "------------------------------------------------------------------------------
+" Last Change:	2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if (exists("current_compiler") && current_compiler == "decada") || version < 700
    finish
@@ -34,13 +35,6 @@
    call g:decada.Set_Session ()
 endif
 
-if exists(":CompilerSet") != 2
-   "
-   " plugin loaded by other means then the "compiler" command
-   "
-   command -nargs=* CompilerSet setlocal <args>
-endif
-
 execute "CompilerSet makeprg="     . escape (g:decada.Make_Command, ' ')
 execute "CompilerSet errorformat=" . escape (g:decada.Error_Format, ' ')
 
diff --git a/runtime/compiler/dot.vim b/runtime/compiler/dot.vim
index 773a6fb..145411e 100644
--- a/runtime/compiler/dot.vim
+++ b/runtime/compiler/dot.vim
@@ -2,16 +2,13 @@
 " Compiler:     ATT dot
 " Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
 " Last Change:	2024 March 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dot"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=dot\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"
 " matches error messages as below skipping final part after line number
 " Error: ./file.dot: syntax error in line 1 near 'rankdir'
diff --git a/runtime/compiler/dotnet.vim b/runtime/compiler/dotnet.vim
index ac64084..1290357 100644
--- a/runtime/compiler/dotnet.vim
+++ b/runtime/compiler/dotnet.vim
@@ -2,6 +2,7 @@
 " Compiler:            dotnet build (.NET CLI)
 " Maintainer:          Nick Jensen <nickspoon@gmail.com>
 " Last Change:         2022-12-06
+"                      2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " License:             Vim (see :h license)
 " Repository:          https://github.com/nickspoons/vim-cs
 
@@ -10,10 +11,6 @@
 endif
 let current_compiler = "dotnet"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/erlang.vim b/runtime/compiler/erlang.vim
index e22887e..b30b5c1 100644
--- a/runtime/compiler/erlang.vim
+++ b/runtime/compiler/erlang.vim
@@ -2,6 +2,7 @@
 " Compiler:     Erlang
 " Maintainer:	Dmitry Vasiliev <dima at hlabs dot org>
 " Last Change:	2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
diff --git a/runtime/compiler/eruby.vim b/runtime/compiler/eruby.vim
index a81a3f3..815d082 100644
--- a/runtime/compiler/eruby.vim
+++ b/runtime/compiler/eruby.vim
@@ -3,17 +3,13 @@
 " Maintainer:		Doug Kearns <dougkearns@gmail.com>
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:		2018 Jan 25
+" Last Change:		2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "eruby"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/eslint.vim b/runtime/compiler/eslint.vim
index 7d57acb..db7a665 100644
--- a/runtime/compiler/eslint.vim
+++ b/runtime/compiler/eslint.vim
@@ -2,15 +2,12 @@
 " Compiler:    ESLint for JavaScript
 " Maintainer:  Romain Lafourcade <romainlafourcade@gmail.com>
 " Last Change: 2020 August 20
+"	       2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "eslint"
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=npx\ eslint\ --format\ compact
 CompilerSet errorformat=%f:\ line\ %l\\,\ col\ %c\\,\ %m,%-G%.%#
diff --git a/runtime/compiler/fbc.vim b/runtime/compiler/fbc.vim
index 1c29392..afedc32 100644
--- a/runtime/compiler/fbc.vim
+++ b/runtime/compiler/fbc.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	FreeBASIC Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2015 Jan 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fbc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/fortran_F.vim b/runtime/compiler/fortran_F.vim
index d9cb47c..7f6ec81 100644
--- a/runtime/compiler/fortran_F.vim
+++ b/runtime/compiler/fortran_F.vim
@@ -3,17 +3,14 @@
 " URL:		http://www.unb.ca/chem/ajit/compiler/fortran_F.vim
 " Maintainer:	Ajit J. Thakkar (ajit AT unb.ca); <http://www.unb.ca/chem/ajit/>
 " Version:	0.2
-" Last Change: 2004 Mar 27
+" Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fortran_F"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cposet=&cpoptions
 set cpoptions-=C
 
diff --git a/runtime/compiler/fortran_cv.vim b/runtime/compiler/fortran_cv.vim
index bc217bd..ea46d99 100644
--- a/runtime/compiler/fortran_cv.vim
+++ b/runtime/compiler/fortran_cv.vim
@@ -2,16 +2,13 @@
 " Compiler:	Compaq Visual Fortran
 " Maintainer:	Joh.-G. Simon (johann-guenter.simon@linde-le.com)
 " Last Change:	11/05/2002
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fortran_cv"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cposet = &cpoptions
 set cpoptions-=C
 
diff --git a/runtime/compiler/fortran_elf90.vim b/runtime/compiler/fortran_elf90.vim
index 34c33cf..903701e 100644
--- a/runtime/compiler/fortran_elf90.vim
+++ b/runtime/compiler/fortran_elf90.vim
@@ -4,17 +4,14 @@
 " URL:		http://www.unb.ca/chem/ajit/compiler/fortran_elf90.vim
 " Maintainer:	Ajit J. Thakkar (ajit AT unb.ca); <http://www.unb.ca/chem/ajit/>
 " Version:	0.2
-" Last Change: 2004 Mar 27
+" Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fortran_elf90"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cposet=&cpoptions
 set cpoptions-=C
 
diff --git a/runtime/compiler/fortran_g77.vim b/runtime/compiler/fortran_g77.vim
index 744ce6a..dcac2a7 100644
--- a/runtime/compiler/fortran_g77.vim
+++ b/runtime/compiler/fortran_g77.vim
@@ -2,6 +2,7 @@
 " Compiler:     g77 (GNU Fortran)
 " Maintainer:   Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
 " Last Change:  $Date: 2004/06/13 18:17:36 $
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " $Revision: 1.1 $
 
 if exists("current_compiler")
@@ -9,10 +10,6 @@
 endif
 let current_compiler = "fortran_g77"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/fortran_lf95.vim b/runtime/compiler/fortran_lf95.vim
index 685fee7..2cb7158 100644
--- a/runtime/compiler/fortran_lf95.vim
+++ b/runtime/compiler/fortran_lf95.vim
@@ -3,17 +3,14 @@
 " URL:		http://www.unb.ca/chem/ajit/compiler/fortran_lf95.vim
 " Maintainer:	Ajit J. Thakkar (ajit AT unb.ca); <http://www.unb.ca/chem/ajit/>
 " Version:	0.2
-" Last Change: 2004 Mar 27
+" Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fortran_lf95"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cposet=&cpoptions
 set cpoptions-=C
 
diff --git a/runtime/compiler/fpc.vim b/runtime/compiler/fpc.vim
index de8e2fe..0d321ab 100644
--- a/runtime/compiler/fpc.vim
+++ b/runtime/compiler/fpc.vim
@@ -2,16 +2,13 @@
 " Compiler:     FPC 2.1
 " Maintainer:   Jaroslaw Blasiok <jaro3000@o2.pl>
 " Last Change:  2005 October 07
+"               2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "fpc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " NOTE: compiler must be run with -vb to write whole source path, not only file
 " name.
 CompilerSet errorformat=%f(%l\\,%c)\ %m
diff --git a/runtime/compiler/g95.vim b/runtime/compiler/g95.vim
index ecb3212..e0b3a68 100644
--- a/runtime/compiler/g95.vim
+++ b/runtime/compiler/g95.vim
@@ -2,6 +2,7 @@
 " Maintainer: H Xu <xuhdev@gmail.com>
 " Version: 0.1.3
 " Last Change: 2012 Apr 30
+"              2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " Homepage: http://www.vim.org/scripts/script.php?script_id=3492
 "           https://bitbucket.org/xuhdev/compiler-g95.vim
 " License: Same as Vim
@@ -13,10 +14,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=
             \%AIn\ file\ %f:%l,
             \%-C%p1,
diff --git a/runtime/compiler/gawk.vim b/runtime/compiler/gawk.vim
index a109eb8..f2a360d 100644
--- a/runtime/compiler/gawk.vim
+++ b/runtime/compiler/gawk.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	GNU Awk
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Feb 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "gawk"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/gcc.vim b/runtime/compiler/gcc.vim
index 30e5149..7b6ebb9 100644
--- a/runtime/compiler/gcc.vim
+++ b/runtime/compiler/gcc.vim
@@ -1,10 +1,11 @@
 " Vim compiler file
-" Compiler:             GNU C Compiler
-" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
-" Latest Revision:      2010-10-14
-" 			changed pattern for entering/leaving directories
-" 			by Daniel Hahler, 2019 Jul 12
-" 			added line suggested by Anton Lindqvist 2016 Mar 31
+" Compiler:		GNU C Compiler
+" Previous Maintainer:	Nikolai Weibull <now@bitwi.se>
+" Last Change:		2010 Oct 14
+"			changed pattern for entering/leaving directories
+"			by Daniel Hahler, 2019 Jul 12
+"			added line suggested by Anton Lindqvist 2016 Mar 31
+"			2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
diff --git a/runtime/compiler/gfortran.vim b/runtime/compiler/gfortran.vim
index 1e4e5cf..1fea3bc 100644
--- a/runtime/compiler/gfortran.vim
+++ b/runtime/compiler/gfortran.vim
@@ -2,6 +2,7 @@
 " Maintainer: H Xu <xuhdev@gmail.com>
 " Version: 0.1.3
 " Last Change: 2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " Homepage: http://www.vim.org/scripts/script.php?script_id=3496
 "           https://bitbucket.org/xuhdev/compiler-gfortran.vim
 " License: Same as Vim
@@ -13,10 +14,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=
             \%A%f:%l.%c:,
             \%-Z%trror:\ %m,
diff --git a/runtime/compiler/gjs.vim b/runtime/compiler/gjs.vim
index e033764..b1be8cf 100644
--- a/runtime/compiler/gjs.vim
+++ b/runtime/compiler/gjs.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	GJS (Gnome JavaScript Bindings)
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "gjs"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/gm2.vim b/runtime/compiler/gm2.vim
index 5053912..954da9d 100644
--- a/runtime/compiler/gm2.vim
+++ b/runtime/compiler/gm2.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	GNU Modula-2 Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2024 Jan 04
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "gm2"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/gnat.vim b/runtime/compiler/gnat.vim
index 3ad1eb4..086edbe 100644
--- a/runtime/compiler/gnat.vim
+++ b/runtime/compiler/gnat.vim
@@ -52,13 +52,6 @@
    call g:gnat.Set_Session ()
 endif
 
-if exists(":CompilerSet") != 2
-   "
-   " plugin loaded by other means then the "compiler" command
-   "
-   command -nargs=* CompilerSet setlocal <args>
-endif
-
 execute "CompilerSet makeprg="     . escape (g:gnat.Get_Command('Make'), ' ')
 execute "CompilerSet errorformat=" . escape (g:gnat.Error_Format, ' ')
 
diff --git a/runtime/compiler/go.vim b/runtime/compiler/go.vim
index cf638f2..eef897f 100644
--- a/runtime/compiler/go.vim
+++ b/runtime/compiler/go.vim
@@ -2,6 +2,7 @@
 " Compiler:	Go
 " Maintainer:	David Barnett (https://github.com/google/vim-ft-go)
 " Last Change:	2014 Aug 16
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists('current_compiler')
   finish
diff --git a/runtime/compiler/haml.vim b/runtime/compiler/haml.vim
index 9464c3d..99c171d 100644
--- a/runtime/compiler/haml.vim
+++ b/runtime/compiler/haml.vim
@@ -2,16 +2,13 @@
 " Compiler:	Haml
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Last Change:	2016 Aug 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "haml"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/hare.vim b/runtime/compiler/hare.vim
index c0fa68c..5bece78 100644
--- a/runtime/compiler/hare.vim
+++ b/runtime/compiler/hare.vim
@@ -2,6 +2,7 @@
 " Compiler: Hare Compiler
 " Maintainer: Amelia Clarke <me@rsaihe.dev>
 " Last Change: 2022-09-21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("g:current_compiler")
   finish
diff --git a/runtime/compiler/hp_acc.vim b/runtime/compiler/hp_acc.vim
index 15d5ce5..f6ccc57 100644
--- a/runtime/compiler/hp_acc.vim
+++ b/runtime/compiler/hp_acc.vim
@@ -3,6 +3,7 @@
 " Maintainer:	Matthias Ulrich <matthias-ulrich@web.de>
 " URL:          http://www.subhome.de/vim/hp_acc.vim
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 "
 "  aCC --version says: "HP ANSI C++ B3910B A.03.13"
 "  This compiler has been tested on:
@@ -22,10 +23,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%A%trror\ %n\:\ \"%f\"\\,\ line\ %l\ \#\ %m,
          \%A%tarning\ (suggestion)\ %n\:\ \"%f\"\\,\ line\ %l\ \#\ %m\ %#,
          \%A%tarning\ %n\:\ \"%f\"\\,\ line\ %l\ \#\ %m\ %#,
diff --git a/runtime/compiler/icc.vim b/runtime/compiler/icc.vim
index 751fba6..37958f1 100644
--- a/runtime/compiler/icc.vim
+++ b/runtime/compiler/icc.vim
@@ -2,16 +2,13 @@
 " Compiler:		icc - Intel C++
 " Maintainer: Peter Puck <PtrPck@netscape.net>
 " Last Change: 2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "icc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " I think that Intel is calling the compiler icl under Windows
 
 CompilerSet errorformat=%-Z%p^,%f(%l):\ remark\ #%n:%m,%f(%l)\ :\ (col.\ %c)\ remark:\ %m,%E%f(%l):\ error:\ %m,%E%f(%l):\ error:\ #%n:\ %m,%W%f(%l):\ warning\ #%n:\ %m,%W%f(%l):\ warning:\ %m,%-C%.%#
diff --git a/runtime/compiler/icon.vim b/runtime/compiler/icon.vim
index 40f6793..8b46af2 100644
--- a/runtime/compiler/icon.vim
+++ b/runtime/compiler/icon.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Icon Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2022 Jun 16
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "icont"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/ifort.vim b/runtime/compiler/ifort.vim
index 3a60d0c..8c58ba6 100644
--- a/runtime/compiler/ifort.vim
+++ b/runtime/compiler/ifort.vim
@@ -2,6 +2,7 @@
 " Maintainer: H Xu <xuhdev@gmail.com>
 " Version: 0.1.1
 " Last Change: 2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " Homepage: http://www.vim.org/scripts/script.php?script_id=3497
 "           https://bitbucket.org/xuhdev/compiler-ifort.vim
 " License: Same as Vim
@@ -13,10 +14,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=
             \%A%f(%l):\ %trror\ \#%n:\ %m,
             \%A%f(%l):\ %tarning\ \#%n:\ %m,
diff --git a/runtime/compiler/intel.vim b/runtime/compiler/intel.vim
index 254d13b..cde62b1 100644
--- a/runtime/compiler/intel.vim
+++ b/runtime/compiler/intel.vim
@@ -2,6 +2,7 @@
 " Compiler:     Intel C++ 7.1
 " Maintainer:   David Harrison <david_jr@users.sourceforge.net>
 " Last Change:  2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%E%f(%l):\ error:\ %m,
 		    \%W%f(%l):\ warning:\ %m,
 		    \%I%f(%l):\ remark\ #%n:\ %m,
diff --git a/runtime/compiler/irix5_c.vim b/runtime/compiler/irix5_c.vim
index f440e74..f70bfb1 100644
--- a/runtime/compiler/irix5_c.vim
+++ b/runtime/compiler/irix5_c.vim
@@ -2,6 +2,7 @@
 " Compiler:	SGI IRIX 5.3 cc
 " Maintainer:	David Harrison <david_jr@users.sourceforge.net>
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=\%Ecfe:\ Error:\ %f\\,\ line\ %l:\ %m,
 		     \%Wcfe:\ Warning:\ %n:\ %f\\,\ line\ %l:\ %m,
 		     \%Wcfe:\ Warning\ %n:\ %f\\,\ line\ %l:\ %m,
diff --git a/runtime/compiler/irix5_cpp.vim b/runtime/compiler/irix5_cpp.vim
index 0112dc1..85ab8c6 100644
--- a/runtime/compiler/irix5_cpp.vim
+++ b/runtime/compiler/irix5_cpp.vim
@@ -2,6 +2,7 @@
 " Compiler:	SGI IRIX 5.3 CC or NCC
 " Maintainer:	David Harrison <david_jr@users.sourceforge.net>
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%E\"%f\"\\,\ line\ %l:\ error(%n):\ ,
 		    \%E\"%f\"\\,\ line\ %l:\ error(%n):\ %m,
 		    \%W\"%f\"\\,\ line\ %l:\ warning(%n):\ %m,
diff --git a/runtime/compiler/javac.vim b/runtime/compiler/javac.vim
index 8507efd..f5fe841 100644
--- a/runtime/compiler/javac.vim
+++ b/runtime/compiler/javac.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Java Development Kit Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Oct 21
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "javac"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/jest.vim b/runtime/compiler/jest.vim
index a4bb549..663123c 100644
--- a/runtime/compiler/jest.vim
+++ b/runtime/compiler/jest.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Jest
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2021 Nov 20
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "jest"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/jikes.vim b/runtime/compiler/jikes.vim
index 2d4500e..f12c2cf 100644
--- a/runtime/compiler/jikes.vim
+++ b/runtime/compiler/jikes.vim
@@ -2,6 +2,7 @@
 " Compiler:	Jikes
 " Maintainer:	Dan Sharp <dwsharp at hotmail dot com>
 " Last Change:	2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " URL:		http://dwsharp.users.sourceforge.net/vim/compiler
 
 if exists("current_compiler")
@@ -9,10 +10,6 @@
 endif
 let current_compiler = "jikes"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " Jikes defaults to printing output on stderr
 CompilerSet makeprg=jikes\ -Xstdout\ +E\ \"%:S\"
 CompilerSet errorformat=%f:%l:%v:%*\\d:%*\\d:%*\\s%m
diff --git a/runtime/compiler/jjs.vim b/runtime/compiler/jjs.vim
index 09a9736..543d9ca 100644
--- a/runtime/compiler/jjs.vim
+++ b/runtime/compiler/jjs.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Nashorn Shell
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2018 Jan 9
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "jjs"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/jshint.vim b/runtime/compiler/jshint.vim
index 865591c..9879ef4 100644
--- a/runtime/compiler/jshint.vim
+++ b/runtime/compiler/jshint.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	JSHint
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "jshint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/jsonlint.vim b/runtime/compiler/jsonlint.vim
index 5466dcc..6283b1b 100644
--- a/runtime/compiler/jsonlint.vim
+++ b/runtime/compiler/jsonlint.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	JSON Lint
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "jsonlint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/mcs.vim b/runtime/compiler/mcs.vim
index 94a1848..4d94f47 100644
--- a/runtime/compiler/mcs.vim
+++ b/runtime/compiler/mcs.vim
@@ -3,6 +3,7 @@
 " Maintainer:   Jarek Sobiecki <harijari@go2.pl>
 " Contributors: Peter Collingbourne and Enno Nagel
 " Last Change:  2024 Mar 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
diff --git a/runtime/compiler/mips_c.vim b/runtime/compiler/mips_c.vim
index a0ebfe7..544f314 100644
--- a/runtime/compiler/mips_c.vim
+++ b/runtime/compiler/mips_c.vim
@@ -2,6 +2,7 @@
 " Compiler:	SGI IRIX 6.5 MIPS C (cc)
 " Maintainer:	David Harrison <david_jr@users.sourceforge.net>
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%Ecc\-%n\ %.%#:\ ERROR\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Wcc\-%n\ %.%#:\ WARNING\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Icc\-%n\ %.%#:\ REMARK\ File\ =\ %f\%\\,\ Line\ =\ %l,
diff --git a/runtime/compiler/mipspro_c89.vim b/runtime/compiler/mipspro_c89.vim
index 20eb70d..4d6bdab 100644
--- a/runtime/compiler/mipspro_c89.vim
+++ b/runtime/compiler/mipspro_c89.vim
@@ -2,6 +2,7 @@
 " Compiler:	SGI IRIX 6.5 MIPSPro C (c89)
 " Maintainer:	David Harrison <david_jr@users.sourceforge.net>
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%Ecc\-%n\ %.%#:\ ERROR\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Wcc\-%n\ %.%#:\ WARNING\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Icc\-%n\ %.%#:\ REMARK\ File\ =\ %f\%\\,\ Line\ =\ %l,
diff --git a/runtime/compiler/mipspro_cpp.vim b/runtime/compiler/mipspro_cpp.vim
index 2f43af8..9aac2a6 100644
--- a/runtime/compiler/mipspro_cpp.vim
+++ b/runtime/compiler/mipspro_cpp.vim
@@ -2,6 +2,7 @@
 " Compiler:	SGI IRIX 6.5 MIPSPro C++ (CC)
 " Maintainer:	David Harrison <david_jr@users.sourceforge.net>
 " Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=%Ecc\-%n\ %.%#:\ ERROR\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Wcc\-%n\ %.%#:\ WARNING\ File\ =\ %f\%\\,\ Line\ =\ %l,
 		    \%Icc\-%n\ %.%#:\ REMARK\ File\ =\ %f\%\\,\ Line\ =\ %l,
diff --git a/runtime/compiler/modelsim_vcom.vim b/runtime/compiler/modelsim_vcom.vim
index 184b403..8c6b806 100644
--- a/runtime/compiler/modelsim_vcom.vim
+++ b/runtime/compiler/modelsim_vcom.vim
@@ -3,6 +3,7 @@
 " Maintainer:	Paul Baleme <pbaleme@mail.com>
 " Contributors: Enno Nagel
 " Last Change:	2024 Mar 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " Thanks to:    allanherriman@hotmail.com
 
 if exists("current_compiler")
@@ -10,10 +11,6 @@
 endif
 let current_compiler = "modelsim_vcom"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=vcom
 
 "setlocal errorformat=\*\*\ %tRROR:\ %f(%l):\ %m,%tRROR:\ %f(%l):\ %m,%tARNING\[%*[0-9]\]:\ %f(%l):\ %m,\*\*\ %tRROR:\ %m,%tRROR:\ %m,%tARNING\[%*[0-9]\]:\ %m
diff --git a/runtime/compiler/msbuild.vim b/runtime/compiler/msbuild.vim
index 3652ca0..c871efa 100644
--- a/runtime/compiler/msbuild.vim
+++ b/runtime/compiler/msbuild.vim
@@ -2,6 +2,7 @@
 " Compiler:	Microsoft Visual Studio C#
 " Maintainer:	Chiel ten Brinke (ctje92@gmail.com)
 " Last Change:	2013 May 13
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=\ %#%f(%l\\\,%c):\ %m
 CompilerSet makeprg=msbuild\ /nologo\ /v:q\ /property:GenerateFullPaths=true
 
diff --git a/runtime/compiler/msvc.vim b/runtime/compiler/msvc.vim
index 0d5660c..3d40de5 100644
--- a/runtime/compiler/msvc.vim
+++ b/runtime/compiler/msvc.vim
@@ -2,6 +2,7 @@
 " Compiler:	Microsoft Visual C
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
 " Last Change:	2023 Aug 10
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 if exists("current_compiler")
diff --git a/runtime/compiler/neato.vim b/runtime/compiler/neato.vim
index 102c16e..0f36734 100644
--- a/runtime/compiler/neato.vim
+++ b/runtime/compiler/neato.vim
@@ -2,16 +2,13 @@
 " Compiler:     ATT neato
 " Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
 " Last Change:	2024 March 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "neato"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=neato\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"
 " matches error messages as below skipping final part after line number
 " Error: ./file.dot: syntax error in line 1 near 'rankdir'
diff --git a/runtime/compiler/ocaml.vim b/runtime/compiler/ocaml.vim
index faa8af1..754289f 100644
--- a/runtime/compiler/ocaml.vim
+++ b/runtime/compiler/ocaml.vim
@@ -3,6 +3,7 @@
 " Maintainer:  Markus Mottl <markus.mottl@gmail.com>
 " URL:         https://github.com/ocaml/vim-ocaml
 " Last Change:
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 "              2020 Mar 28 - Improved error format (Thomas Leonard)
 "              2017 Nov 26 - Improved error format (Markus Mottl)
 "              2013 Aug 27 - Added a new OCaml error format (Markus Mottl)
diff --git a/runtime/compiler/onsgmls.vim b/runtime/compiler/onsgmls.vim
index 68925ef..4306f99 100644
--- a/runtime/compiler/onsgmls.vim
+++ b/runtime/compiler/onsgmls.vim
@@ -2,16 +2,13 @@
 " Compiler:	onsgmls
 " Maintainer:	Robert Rowsome <rowsome@wam.umd.edu>
 " Last Change:	2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "onsgmls"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/pbx.vim b/runtime/compiler/pbx.vim
index 9e81ea7..5a45f7f 100644
--- a/runtime/compiler/pbx.vim
+++ b/runtime/compiler/pbx.vim
@@ -2,16 +2,13 @@
 " Compiler:	Apple Project Builder
 " Maintainer:	Alexander von Below (public@vonBelow.Com)
 " Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
    finish
 endif
 let current_compiler = "pbx"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " The compiler actually is gcc, so the errorformat is unchanged
 CompilerSet errorformat&
 
diff --git a/runtime/compiler/perl.vim b/runtime/compiler/perl.vim
index 21e384f..6aeaac3 100644
--- a/runtime/compiler/perl.vim
+++ b/runtime/compiler/perl.vim
@@ -6,16 +6,13 @@
 " Bugs/requests: https://github.com/vim-perl/vim-perl/issues
 " License:       Vim License (see :help license)
 " Last Change:   2021 Nov 2
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "perl"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:savecpo = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/perlcritic.vim b/runtime/compiler/perlcritic.vim
index cf0678e..4b5f34d 100644
--- a/runtime/compiler/perlcritic.vim
+++ b/runtime/compiler/perlcritic.vim
@@ -6,16 +6,13 @@
 " Bugs/requests: https://github.com/vim-perl/vim-perl/issues
 " License:       Vim License (see :help license)
 " Last Change:   2021 Oct 20
+"                2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "perlcritic"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/php.vim b/runtime/compiler/php.vim
index 92f93b8..f5d5210 100644
--- a/runtime/compiler/php.vim
+++ b/runtime/compiler/php.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	PHP CLI
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2013 Jun 25
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "php"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/podchecker.vim b/runtime/compiler/podchecker.vim
index 2cd4e13..20faaa4 100644
--- a/runtime/compiler/podchecker.vim
+++ b/runtime/compiler/podchecker.vim
@@ -6,16 +6,13 @@
 " Bugs/requests: https://github.com/vim-perl/vim-perl/issues
 " License:       Vim License (see :help license)
 " Last Change:   2021 Oct 20
+"                2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "podchecker"
 
-if exists(":CompilerSet") != 2          " older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/powershell.vim b/runtime/compiler/powershell.vim
index 445a2f6..4b1ce88 100644
--- a/runtime/compiler/powershell.vim
+++ b/runtime/compiler/powershell.vim
@@ -3,16 +3,13 @@
 " URL: https://github.com/PProvost/vim-ps1
 " Contributors: Enno Nagel
 " Last Change: 2024 Mar 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "powershell"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/pylint.vim b/runtime/compiler/pylint.vim
index 93079ce..14e9696 100644
--- a/runtime/compiler/pylint.vim
+++ b/runtime/compiler/pylint.vim
@@ -2,15 +2,12 @@
 " Compiler:	Pylint for Python
 " Maintainer: Daniel Moch <daniel@danielmoch.com>
 " Last Change: 2016 May 20
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "pylint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=pylint\ --output-format=text\ --msg-template=\"{path}:{line}:{column}:{C}:\ [{symbol}]\ {msg}\"\ --reports=no
 CompilerSet errorformat=%A%f:%l:%c:%t:\ %m,%A%f:%l:\ %m,%A%f:(%l):\ %m,%-Z%p^%.%#,%-G%.%#
diff --git a/runtime/compiler/pyunit.vim b/runtime/compiler/pyunit.vim
index 2a4ea92..2368346 100644
--- a/runtime/compiler/pyunit.vim
+++ b/runtime/compiler/pyunit.vim
@@ -2,15 +2,12 @@
 " Compiler:	Unit testing tool for Python
 " Maintainer:	Max Ischenko <mfi@ukr.net>
 " Last Change: 2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "pyunit"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet efm=%C\ %.%#,%A\ \ File\ \"%f\"\\,\ line\ %l%.%#,%Z%[%^\ ]%\\@=%m
 
diff --git a/runtime/compiler/raco.vim b/runtime/compiler/raco.vim
index bd10859..d35d86b 100644
--- a/runtime/compiler/raco.vim
+++ b/runtime/compiler/raco.vim
@@ -3,12 +3,9 @@
 " Maintainer:   D. Ben Knoble <ben.knoble+github@gmail.com>
 " URL:          https://github.com/benknoble/vim-racket
 " Last Change: 2022 Aug 12
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 let current_compiler = 'raco'
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=raco
 CompilerSet errorformat=%f:%l:%c:%m
diff --git a/runtime/compiler/racomake.vim b/runtime/compiler/racomake.vim
index dae95fe..bd2c327 100644
--- a/runtime/compiler/racomake.vim
+++ b/runtime/compiler/racomake.vim
@@ -3,12 +3,9 @@
 " Maintainer:   D. Ben Knoble <ben.knoble+github@gmail.com>
 " URL:          https://github.com/benknoble/vim-racket
 " Last Change: 2022 Aug 12
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 let current_compiler = 'racomake'
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=raco\ make\ --\ %
 CompilerSet errorformat=%f:%l:%c:%m
diff --git a/runtime/compiler/racosetup.vim b/runtime/compiler/racosetup.vim
index 1efe8a1..e16faf0 100644
--- a/runtime/compiler/racosetup.vim
+++ b/runtime/compiler/racosetup.vim
@@ -3,12 +3,9 @@
 " Maintainer:   D. Ben Knoble <ben.knoble+github@gmail.com>
 " URL:          https://github.com/benknoble/vim-racket
 " Last Change: 2022 Aug 12
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 let current_compiler = 'racosetup'
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=raco\ setup
 CompilerSet errorformat=%f:%l:%c:%m
diff --git a/runtime/compiler/racotest.vim b/runtime/compiler/racotest.vim
index d2a1a3c..3ac1173 100644
--- a/runtime/compiler/racotest.vim
+++ b/runtime/compiler/racotest.vim
@@ -3,12 +3,9 @@
 " Maintainer:   D. Ben Knoble <ben.knoble+github@gmail.com>
 " URL:          https://github.com/benknoble/vim-racket
 " Last Change: 2022 Aug 12
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 let current_compiler = 'racotest'
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=raco\ test\ %
 CompilerSet errorformat=location:%f:%l:%c
diff --git a/runtime/compiler/rake.vim b/runtime/compiler/rake.vim
index 3d11a31..5b3c7f4 100644
--- a/runtime/compiler/rake.vim
+++ b/runtime/compiler/rake.vim
@@ -4,16 +4,13 @@
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:		2018 Mar 02
+"			2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "rake"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/rhino.vim b/runtime/compiler/rhino.vim
index 30f3dd3..b6fc9c8 100644
--- a/runtime/compiler/rhino.vim
+++ b/runtime/compiler/rhino.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Rhino Shell (JavaScript in Java)
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "rhino"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/rspec.vim b/runtime/compiler/rspec.vim
index 0cfce04..ee848f7 100644
--- a/runtime/compiler/rspec.vim
+++ b/runtime/compiler/rspec.vim
@@ -4,16 +4,13 @@
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:		2018 Aug 07
+"			2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "rspec"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/rst.vim b/runtime/compiler/rst.vim
index 392bea6..72b6a58 100644
--- a/runtime/compiler/rst.vim
+++ b/runtime/compiler/rst.vim
@@ -2,7 +2,8 @@
 " Compiler:             sphinx >= 1.0.8, http://www.sphinx-doc.org
 " Description:          reStructuredText Documentation Format
 " Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
-" Latest Revision:      2017-03-31
+" Last Change:          2017 Mar 31
+"                       2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -12,10 +13,6 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=
       \%f\\:%l:\ %tEBUG:\ %m,
       \%f\\:%l:\ %tNFO:\ %m,
diff --git a/runtime/compiler/rubocop.vim b/runtime/compiler/rubocop.vim
index 7764b4a..9d2f014 100644
--- a/runtime/compiler/rubocop.vim
+++ b/runtime/compiler/rubocop.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	RuboCop
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "rubocop"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/ruby.vim b/runtime/compiler/ruby.vim
index 82d4d1c..70dff5b 100644
--- a/runtime/compiler/ruby.vim
+++ b/runtime/compiler/ruby.vim
@@ -5,16 +5,13 @@
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:		2019 Jan 06
+"			2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "ruby"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/rubyunit.vim b/runtime/compiler/rubyunit.vim
index 48e8fa4..e59873f 100644
--- a/runtime/compiler/rubyunit.vim
+++ b/runtime/compiler/rubyunit.vim
@@ -4,16 +4,13 @@
 " URL:			https://github.com/vim-ruby/vim-ruby
 " Release Coordinator:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:		2014 Mar 23
+"			2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "rubyunit"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/rustc.vim b/runtime/compiler/rustc.vim
index efcf24e..b3c8091 100644
--- a/runtime/compiler/rustc.vim
+++ b/runtime/compiler/rustc.vim
@@ -14,10 +14,6 @@
 set cpo&vim
 " vint: +ProhibitAbbreviationOption
 
-if exists(":CompilerSet") != 2
-    command -nargs=* CompilerSet setlocal <args>
-endif
-
 if get(g:, 'rustc_makeprg_no_percent', 0)
     CompilerSet makeprg=rustc
 else
diff --git a/runtime/compiler/sass.vim b/runtime/compiler/sass.vim
index 9c540ac..d0ed65c 100644
--- a/runtime/compiler/sass.vim
+++ b/runtime/compiler/sass.vim
@@ -2,16 +2,13 @@
 " Compiler:	Sass
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Last Change:	2016 Aug 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "sass"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/se.vim b/runtime/compiler/se.vim
index 38fd10c..c933227 100644
--- a/runtime/compiler/se.vim
+++ b/runtime/compiler/se.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	se (Liberty Eiffel Compiler)
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2013 Jun 29
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "se"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/shellcheck.vim b/runtime/compiler/shellcheck.vim
index 7550439..5eeddc6 100644
--- a/runtime/compiler/shellcheck.vim
+++ b/runtime/compiler/shellcheck.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	ShellCheck
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Sep 4
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "shellcheck"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/sml.vim b/runtime/compiler/sml.vim
index a0b13b6..e829e20 100644
--- a/runtime/compiler/sml.vim
+++ b/runtime/compiler/sml.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	SML/NJ Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2022 Feb 09
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "sml"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/spectral.vim b/runtime/compiler/spectral.vim
index bd13c51..f1ea865 100644
--- a/runtime/compiler/spectral.vim
+++ b/runtime/compiler/spectral.vim
@@ -2,16 +2,13 @@
 " Compiler:    Spectral for YAML
 " Maintainer:  Romain Lafourcade <romainlafourcade@gmail.com>
 " Last Change: 2021 July 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
     finish
 endif
 let current_compiler = "spectral"
 
-if exists(":CompilerSet") != 2
-    command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=spectral\ lint\ %\ -f\ text
 CompilerSet errorformat=%f:%l:%c\ %t%.%\\{-}\ %m
 
diff --git a/runtime/compiler/splint.vim b/runtime/compiler/splint.vim
index 3d7ada6..e004601 100644
--- a/runtime/compiler/splint.vim
+++ b/runtime/compiler/splint.vim
@@ -3,6 +3,7 @@
 " Maintainer:   Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
 " Splint Home:	http://www.splint.org/
 " Last Change:  2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " $Revision: 1.3 $
 
 if exists("current_compiler")
@@ -10,10 +11,6 @@
 endif
 let current_compiler = "splint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/standard.vim b/runtime/compiler/standard.vim
index 50b7c97..fdc79ae 100644
--- a/runtime/compiler/standard.vim
+++ b/runtime/compiler/standard.vim
@@ -2,15 +2,12 @@
 " Compiler:    Standard for JavaScript
 " Maintainer:  Romain Lafourcade <romainlafourcade@gmail.com>
 " Last Change: 2020 August 20
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "standard"
 
-if exists(":CompilerSet") != 2
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=npx\ standard
 CompilerSet errorformat=%f:%l:%c:\ %m,%-G%.%#
diff --git a/runtime/compiler/stylelint.vim b/runtime/compiler/stylelint.vim
index 784a61d..22acea9 100644
--- a/runtime/compiler/stylelint.vim
+++ b/runtime/compiler/stylelint.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Stylelint
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Jun 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "stylelint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/tcl.vim b/runtime/compiler/tcl.vim
index 81af185..1e6d1f3 100644
--- a/runtime/compiler/tcl.vim
+++ b/runtime/compiler/tcl.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	tcl
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2004 Nov 27
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "tcl"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=tcl
 
 CompilerSet errorformat=%EError:\ %m,%+Z\ %\\{4}(file\ \"%f\"\ line\ %l),%-G%.%#
diff --git a/runtime/compiler/tex.vim b/runtime/compiler/tex.vim
index 0925d17..9d8c660 100644
--- a/runtime/compiler/tex.vim
+++ b/runtime/compiler/tex.vim
@@ -3,6 +3,7 @@
 " Maintainer:   Artem Chuprina <ran@ran.pp.ru>
 " Contributors: Enno Nagel
 " Last Change:  2024 Mar 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
 	finish
@@ -10,10 +11,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " If makefile exists and we are not asked to ignore it, we use standard make
 " (do not redefine makeprg)
 if exists('b:tex_ignore_makefile') || exists('g:tex_ignore_makefile') ||
diff --git a/runtime/compiler/tidy.vim b/runtime/compiler/tidy.vim
index 3f8e68e..9e72207 100644
--- a/runtime/compiler/tidy.vim
+++ b/runtime/compiler/tidy.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	HTML Tidy
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Sep 4
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "tidy"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/ts-node.vim b/runtime/compiler/ts-node.vim
index 14f0ea7..1b46d3b 100644
--- a/runtime/compiler/ts-node.vim
+++ b/runtime/compiler/ts-node.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	TypeScript Runner
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Feb 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "node"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/tsc.vim b/runtime/compiler/tsc.vim
index a246fc7..76f525b 100644
--- a/runtime/compiler/tsc.vim
+++ b/runtime/compiler/tsc.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	TypeScript Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Feb 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "tsc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/typedoc.vim b/runtime/compiler/typedoc.vim
index 3be06f3..7a152e8 100644
--- a/runtime/compiler/typedoc.vim
+++ b/runtime/compiler/typedoc.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	TypeDoc
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Feb 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "typedoc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/xbuild.vim b/runtime/compiler/xbuild.vim
index b508a46..42c7c65 100644
--- a/runtime/compiler/xbuild.vim
+++ b/runtime/compiler/xbuild.vim
@@ -2,6 +2,7 @@
 " Compiler:	Mono C#
 " Maintainer:	Chiel ten Brinke (ctje92@gmail.com)
 " Last Change:	2013 May 13
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -11,10 +12,6 @@
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat=\ %#%f(%l\\\,%c):\ %m
 CompilerSet makeprg=xbuild\ /nologo\ /v:q\ /property:GenerateFullPaths=true
 
diff --git a/runtime/compiler/xmllint.vim b/runtime/compiler/xmllint.vim
index 79d38b4..16eebb4 100644
--- a/runtime/compiler/xmllint.vim
+++ b/runtime/compiler/xmllint.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Libxml2 Command-Line Tool
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Jul 30
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "xmllint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/xmlwf.vim b/runtime/compiler/xmlwf.vim
index 3de9d08..2e38ca4 100644
--- a/runtime/compiler/xmlwf.vim
+++ b/runtime/compiler/xmlwf.vim
@@ -2,6 +2,7 @@
 " Compiler:	xmlwf
 " Maintainer:	Robert Rowsome <rowsome@wam.umd.edu>
 " Last Change:	2019 Jul 23
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -11,10 +12,6 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=xmlwf\ %:S
 
 CompilerSet errorformat=%f:%l%c:%m
diff --git a/runtime/compiler/xo.vim b/runtime/compiler/xo.vim
index 525657d..74804ca 100644
--- a/runtime/compiler/xo.vim
+++ b/runtime/compiler/xo.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	XO
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 Jul 10
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "xo"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/yamllint.vim b/runtime/compiler/yamllint.vim
index 889b04b..88e2efb 100644
--- a/runtime/compiler/yamllint.vim
+++ b/runtime/compiler/yamllint.vim
@@ -2,15 +2,12 @@
 " Compiler:    Yamllint for YAML
 " Maintainer:  Romain Lafourcade <romainlafourcade@gmail.com>
 " Last Change: 2021 July 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
     finish
 endif
 let current_compiler = "yamllint"
 
-if exists(":CompilerSet") != 2
-    command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=yamllint\ -f\ parsable
 
diff --git a/runtime/compiler/zig.vim b/runtime/compiler/zig.vim
index 2cc6831..44014a3 100644
--- a/runtime/compiler/zig.vim
+++ b/runtime/compiler/zig.vim
@@ -10,10 +10,6 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2
-    command -nargs=* CompilerSet setlocal <args>
-endif
-
 " a subcommand must be provided for the this compiler (test, build-exe, etc)
 if has('patch-7.4.191')
     CompilerSet makeprg=zig\ \$*\ \%:S
diff --git a/runtime/compiler/zsh.vim b/runtime/compiler/zsh.vim
index 5703c1f..bd19558 100644
--- a/runtime/compiler/zsh.vim
+++ b/runtime/compiler/zsh.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Zsh
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Sep 6
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "zsh"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim