patch 7.4.1008v7.4.1008

Problem:    The OS/2 code pollutes the source while nobody uses it these days.
Solution:   Drop the support for OS/2.

30 files changed, 126 insertions, 1002 deletions

diff --git a/runtime/doc/os_os2.txt b/runtime/doc/os_os2.txt
index 231d7d1027..53bb79927d 100644
--- a/runtime/doc/os_os2.txt
+++ b/runtime/doc/os_os2.txt
@@ -1,221 +1,13 @@
-*os_os2.txt*    For Vim version 7.4.  Last change: 2007 Apr 22
+*os_os2.txt*    For Vim version 7.4.  Last change: 2015 Dec 31
 
 
 		  VIM REFERENCE MANUAL    by Paul Slootman
 
 
 							*os2* *OS2* *OS/2*
-This file contains the particularities for the OS/2 version of Vim.
+This file used to contain the particularities for the OS/2 version of Vim.
 
-At present there is no native PM version of the GUI version of Vim: The OS/2
-version is a console application.  However, there is now a Win32s-compatible
-GUI version, which should be usable by owners of Warp 4 (which supports
-Win32s) in a Win-OS/2 session.  The notes in this file refer to the native
-console version.
+The OS/2 support was removed in patch 7.4.1008.
 
 
-NOTE
-
-This OS/2 port works well for me and a couple of other OS/2 users; however,
-since I haven't had much feedback, that either means no (OS/2-specific) bugs
-exist (besides the ones mentioned below), or no one has yet created a
-situation in which any bugs are apparent.  File I/O in Dos and Unix mode,
-binary mode, and FAT handling all seem to work well, which would seem to be
-the most likely places for trouble.
-
-A known problem is that files opened by Vim are inherited by other programs
-that are started via a shell escape from within Vim.  This specifically means
-that Vim won't be able to remove the swap file(s) associated with buffers open
-at the time the other program was started, until the other program is stopped.
-At that time, the swap file may be removed, but if Vim could not do that the
-first time, it won't be removed at all.  You'll get warnings that some other
-Vim session may be editing the file when you start Vim up again on that file.
-This can be reproduced with ":!start epm".  Now quit Vim, and start Vim again
-with the file that was in the buffer at the time epm was started.  I'm working
-on this!
-
-A second problem is that Vim doesn't understand the situation when using it
-when accessing the OS/2 system via the network, e.g. using telnet from a Unix
-system, and then starting Vim.  The problem seems to be that OS/2 =sometimes=
-recognizes function / cursor keys, and tries to convert those to the
-corresponding OS/2 codes generated by the "normal" PC keyboard.  I've been
-testing a workaround (mapping the OS/2 codes to the correct functions), but so
-far I can't say anything conclusive (this is on Warp 3, by the way).  In the
-meantime any help will be appreciated.
-
-
-PREREQUISITES
-
-To run Vim, you need the emx runtime environment (at least rev. 0.9b).  This
-is generally available as (ask Archie about it):
-
-    emxrt.zip     emx runtime package
-
-I've included a copy of emx.dll, which should be copied to one of the
-directories listed in your LIBPATH.  Emx is GPL'ed, but the emx.dll library is
-not (read COPYING.EMX to find out what that means to you).
-
-This emx.dll is from the emxfix04.zip package, which unfortunately has a bug,
-eh, I mean a POSIX feature, in select().  Versions of Vim before 3.27 will
-appear to hang when starting (actually, while processing vimrc).  Hit <Enter> a
-couple of times until Vim starts working if this happens.  Next, get an up to
-date version of Vim!
-
-
-HELP AND VIMRC FILE
-
-If you unpack the archive that Vim came in and run Vim directly from where it
-was unpacked, Vim should be able to find the runtime files and your .vimrc
-without any settings.
-
-If you put the runtime files separately from the binary, the VIM environment
-variable is used to find the location of the help files and the system .vimrc.
-Place an entry such as this in CONFIG.SYS: >
-
-  SET VIM=c:/local/lib/vim
-
-Put your .vimrc and your other Vim files in this directory.  Copy the runtime
-directory to this directory.  Each version of Vim has its own runtime
-directory.  It will be called something like "c:/local/lib/vim/vim54".  Thus
-you get a tree of Vim files like this:
-	c:/local/lib/vim/.vimrc
-	c:/local/lib/vim/vim54/filetype.vim
-	c:/local/lib/vim/vim54/doc/help.txt
-	etc.
-
-Note: .vimrc may also be called _vimrc to accommodate those who have chosen to
-install OS/2 on a FAT file system.  Vim first tries to find .vimrc and if that
-fails, looks for _vimrc in the same place.  The existence of a .vimrc or
-_vimrc file influences the 'compatible' options, which can have unexpected side
-effects.  See |'compatible'|.
-
-If you're using network drives with OS/2, then you can install Vim on a
-network drive (including .vimrc; this is then called the "system" vimrc file),
-and then use a personal copy of .vimrc (the "user" vimrc file).  This should be
-located in a directory indicated by the HOME environment variable.
-
-
-ENVIRONMENT VARIABLES IN FILE NAMES
-
-This HOME environment variable is also used when using ~ in file names, so
-":e ~/textfile" will edit the file "textfile" in the directory referred to by
-HOME.  Additionally you can use other environment variables in file names, as
-in ":n $SRC/*.c".
-
-The HOME environment variable is also used to locate the .viminfo file
-(see |viminfo-file|).  There is no support yet for .viminfo on FAT file
-systems yet, sorry.  You could try the -i startup flag (as in "vim -i
-$HOME/_viminfo") however.
-
-If the HOME environment variable is not set, the value "C:/" is used as a
-default.
-
-
-BACKSLASHES
-
-Using slashes ('/') and backslashes ('\') can be a bit of a problem (see
-|dos-backslash| for more explanation), but in almost all cases Vim does "The
-Right Thing".  Vim itself uses backslashes in file names, but will happily
-accept forward slashes if they are entered (in fact, sometimes that works
-better!).
-
-
-TEMP FILES
-
-Temporary files (for filtering) are put in the first directory in the next
-list that exists and where a file can be created:
-	$TMP
-	$TEMP
-	C:\TMP
-	C:\TEMP
-	current directory
-
-
-TERMINAL SETTING
-
-							*os2ansi*
-Use "os2ansi" as the TERM environment variable (or don't set it at all, as the
-default is the correct value).  You can set term to os2ansi in the .vimrc, in
-case you need TERM to be a different value for other applications.  The
-problem is that OS/2 ANSI emulation is quite limited (it doesn't have insert /
-delete line, for example).
-
-If you want to use a different value for TERM (because of other programs, for
-example), make sure that the termcap entry for that TERM value has the
-appropriate key mappings.  The termcap.dat distributed with emx does not always
-have them.  Here are some suitable values to add to the termcap entry of your
-choice; these allow the cursor keys and the named function keys (such as
-pagedown) to work.
-
-	:ku=\316H:kd=\316P:kl=\316K:kr=\316M:%i=\316t:#4=\316s:\
-	:kD=\316S:kI=\316R:kN=\316Q:kP=\316I:kh=\316G:@7=\316O:\
-	:k1=\316;:k2=\316<:k3=\316=:k4=\316>:k5=\316?:k6=\316@:\
-	:k7=\316A:k8=\316B:k9=\316C:k;=\316D:
-
-
-Paul Slootman
-
-
-43 LINE WINDOW
-
-A suggestion from Steven Tryon, on how to run Vim in a bigger window:
-
-When I call Vim from an OS/2 WPS application such as PMMail it comes up
-in the default 25-line mode.  To get a more useful window size I make
-my external editor "vimbig.cmd" which in turn calls "vimbig2.cmd".
-Brute force and awkwardness, perhaps, but it works.
-
-vimbig.cmd: >
-   @echo off
-   start "Vi Improved" /f vimbig2.cmd %1 %2 %3 %4
-
-vimbig2.cmd: >
-   @echo off
-   mode 80,43
-   vim.exe %1 %2 %3 %4
-   exit
-<
-
-CLIPBOARD ACCESS (provided by Alexander Wagner)
-
-Vim for OS/2 has no direct access to the system clipboard.  To enable access
-anyway you need an additional tool which gives you access to the clipboard
-from within a vio application.  The freeware package clipbrd.zip by Stefan
-Gruendel can be used for this purpose.  You might download the package
-including precompiled binaries and all sources from:
-	http://www.os2site.com/sw/util/clipboard/index.html
-	http://download.uni-hd.de/ftp/pub/os2/pmtools/
-
-Installation of this package is straight forward: just put the two executables
-that come with this package into a directory within your PATH for Vim should
-be able to call them from whatever directory you are working.
-
-To copy text from the clipboard to your Vim session you can use the :r
-command.  Simply call clipbrd.exe from within Vim in the following way: >
-
-	:r !clipbrd -r
-
-To copy text from Vim to the system clipboard just mark the text in the usual
-vim-manner and call: >
-
-	:!clipbrd -w
-
-which will write your selection right into OS/2's clipboard.
-
-For ease of use you might want to add some maps for these commands.  E.g. to
-use F11 to paste the clipboard into Vim and F12 to copy selected text to the
-clipboard you would use: >
-
-	if has("os2")
-	  imap <F11>     <ESC>:r !clipbrd -r<CR>i
-	  vmap <F12>     :!clipbrd -w<cr>
-	else
-	  imap <F11>     <ESC>"*p<CR>i
-	  vmap <F12>     "*y
-	endif
-
-This will ensure that only on OS/2 clipbrd is called whereas on other
-platforms vims build in mechanism is used.  (To enable this functions on every
-load of Vim place the above lines in your .vimrc.)
-
  vim:tw=78:ts=8:ft=help:norl:
diff --git a/src/INSTALL b/src/INSTALL
index 54297d198e..521d058be4 100644
--- a/src/INSTALL
+++ b/src/INSTALL
@@ -176,46 +176,7 @@ And to not search for locally installed headers and libraries at all, use:
 3. OS/2
 =======
 
-Summary:
-ren Makefile Makefile.unix
-ren makefile.os2 Makefile
-make
-
-This port of Vim to OS/2 is based on the emx environment together
-with GNU C. The main design goal of emx is to simplify porting Unix
-software to OS/2 and DOS. Because of this, almost all the Unix defines
-etc. already existing in the Vim source code could be reused. Only where
-OS/2 specifics came into play were additional changes necessary. Those
-places can be found by searching for "OS2" and "__EMX__" (I've tried to
-keep emx-specific things separate from generic OS/2 stuff).
-
-Note: This OS/2 port works well for me and an additional OS/2 user on
-      the Vim development team (Karsten Sievert); however, since I
-      haven't had any other feedback from other people, that either
-      means no (OS/2-specific) bugs exist, or no one has yet created
-      a situation in which any bugs are apparent.
-      Report any problems or other comments to paul@wau.mis.ah.nl
-      (email valid up to at least September 1996, after that try
-      paul@wurtel.hobby.nl, paul@murphy.nl, or paulS@toecompst.nl).
-      Textmode/notextmode and binary mode both seem to work well.
-
-Prerequisites:
-- To compile, you need the emx environment (at least rev. 0.9b), GCC,
-  some make utility (GNU make works fine). These are generally
-  available as (ask Archie about them):
-    emxrt.zip     emx runtime package
-    emxdev.zip    emx development system (without compiler)
-  GNU programs compiled for emx, patches and patched sources:
-    gnudev1.zip   GNU development tools compiled for emx (part 1)
-    gnudev2.zip   GNU development tools compiled for emx (part 2)
-    gnumake.zip   GNU make
-- Don't set a TERM environment variable; Vim defaults to os2ansi
-  which is available as a builtin termcap entry. Using other values
-  may give problems! (OS/2 ANSI emulation is quite limited.) If you
-  need to set TERM for other programs, you may consider putting
-  set term=os2ansi in the vimrc file.
-
-Check ../runtime/doc/os_os2.txt for additional info on running Vim.
+OS/2 support was removed in patch 7.4.1008
 
 
 4. Atari MiNT
diff --git a/src/Make_os2.mak b/src/Make_os2.mak
deleted file mode 100644
index cd62d1c6d5..0000000000
--- a/src/Make_os2.mak
+++ /dev/null
@@ -1,163 +0,0 @@
-#
-# Makefile for VIM on OS/2 using EMX	vim:ts=8:sw=8:tw=78
-#
-# Created by: Paul Slootman
-#
-
-### This Makefile has been successfully tested on these systems.
-### Check the (*) column for remarks, listed below.
-### Later code changes may cause small problems, otherwise Vim is supposed to
-### compile and run without problems.
-### Just to show that this is just like the Unix version!
-
-#system:	      configurations:		     version (*) tested by:
-#-------------	      ------------------------	     -------  -  ----------
-#OS/2 Warp HPFS       gcc-2.7.2+emx-0.9b -GUI		4.5	 Paul Slootman
-#OS/2 FAT	      gcc-2.6.3+emx	 -GUI		4.5	 Karsten Sievert
-
-#>>>>> choose options:
-
-### See feature.h for a list of optionals.
-### Any other defines can be included here.
-
-DEFINES = -DUSE_SYSTEM=1
-
-#>>>>> name of the compiler and linker, name of lib directory
-CC = gcc
-
-#>>>>> end of choices
-
-### Name of target(s)
-TARGET = vim.exe
-
-### Names of the tools that are also made
-TOOLS = xxd/xxd.exe tee/tee.exe
-
-###########################################################################
-
-INCL = vim.h globals.h option.h keymap.h macros.h ascii.h term.h os_unix.h structs.h os_os2_cfg.h
-CFLAGS = -O2 -fno-strength-reduce -DOS2 -Wall -Iproto $(DEFINES)
-
-OBJ = \
-	blowfish.o \
-	buffer.o \
-	charset.o \
-	crypt.o \
-	crypt_zip.o \
-	diff.o \
-	digraph.o \
-	edit.o \
-	eval.o \
-	ex_cmds.o \
-	ex_cmds2.o \
-	ex_docmd.o \
-	ex_eval.o \
-	ex_getln.o \
-	fileio.o \
-	fold.o \
-	getchar.o \
-	hardcopy.o \
-	hashtab.o \
-	main.o \
-	mark.o \
-	memfile.o \
-	memline.o \
-	menu.o \
-	message.o \
-	misc1.o \
-	misc2.o \
-	move.o \
-	mbyte.o \
-	normal.o \
-	ops.o \
-	option.o \
-	popupmnu.o \
-	quickfix.o \
-	regexp.o \
-	screen.o \
-	search.o \
-	sha256.o \
-	spell.o \
-	syntax.o \
-	tag.o \
-	term.o \
-	ui.o \
-	undo.o \
-	window.o \
-	os_unix.o
-
-LIBS = -ltermcap
-
-# Default target is making the executable
-all: $(TARGET) $(TOOLS)
-
-# Link the target for normal use
-LFLAGS = -Zcrtdll -s -o $(TARGET) $(LIBS)
-
-$(TARGET): $(OBJ) version.c version.h
-	$(CC) $(CFLAGS) version.c $(OBJ) $(LFLAGS)
-
-xxd/xxd.exe: xxd/xxd.c
-	cd xxd & $(MAKE) -f Make_os2.mak
-
-tee/tee.exe: tee/tee.c
-	cd tee & $(MAKE) -f Makefile
-
-test:
-	cd testdir & $(MAKE) -f Make_os2.mak
-
-clean:
-	-del *.o
-	-del *.exe
-	-del *.~ *~ *.bak
-	cd xxd   & $(MAKE) -f Make_os2.mak clean
-	cd tee   & $(MAKE) -f Makefile clean
-
-###########################################################################
-
-os_unix.o:	os_unix.c  $(INCL)
-blowfish.o:	blowfish.c  $(INCL)
-buffer.o:	buffer.c  $(INCL)
-charset.o:	charset.c  $(INCL)
-crypt.o:	crypt.c  $(INCL)
-crypt_zip.o:	crypt_zip.c  $(INCL)
-diff.o:		diff.c  $(INCL)
-digraph.o:	digraph.c  $(INCL)
-edit.o:		edit.c  $(INCL)
-eval.o:		eval.c  $(INCL)
-ex_cmds.o:	ex_cmds.c  $(INCL)
-ex_cmds2.o:	ex_cmds2.c  $(INCL)
-ex_docmd.o:	ex_docmd.c  $(INCL) ex_cmds.h
-ex_eval.o:	ex_eval.c  $(INCL) ex_cmds.h
-ex_getln.o:	ex_getln.c  $(INCL)
-fileio.o:	fileio.c  $(INCL)
-fold.o:		fold.c  $(INCL)
-getchar.o:	getchar.c  $(INCL)
-hardcopy.o:	hardcopy.c  $(INCL)
-hashtab.o:	hashtab.c  $(INCL)
-main.o:		main.c  $(INCL)
-mark.o:		mark.c  $(INCL)
-memfile.o:	memfile.c  $(INCL)
-memline.o:	memline.c  $(INCL)
-menu.o:		menu.c  $(INCL)
-message.o:	message.c  $(INCL)
-misc1.o:	misc1.c  $(INCL)
-misc2.o:	misc2.c  $(INCL)
-move.o:		move.c  $(INCL)
-mbyte.o:	mbyte.c  $(INCL)
-normal.o:	normal.c  $(INCL)
-ops.o:		ops.c  $(INCL)
-option.o:	option.c  $(INCL)
-popupmnu.o:	popupmnu.c  $(INCL)
-quickfix.o:	quickfix.c  $(INCL)
-regexp.o:	regexp.c  $(INCL)
-screen.o:	screen.c  $(INCL)
-search.o:	search.c  $(INCL)
-sha256.o:	sha256.c  $(INCL)
-spell.o:	spell.c  $(INCL)
-syntax.o:	syntax.c  $(INCL)
-tag.o:		tag.c  $(INCL)
-term.o:		term.c  $(INCL)
-ui.o:		ui.c  $(INCL)
-undo.o:		undo.c  $(INCL)
-window.o:	window.c  $(INCL)
diff --git a/src/digraph.c b/src/digraph.c
index 9f7d0cc4e2..ba24e3f0fc 100644
--- a/src/digraph.c
+++ b/src/digraph.c
@@ -39,7 +39,7 @@ static garray_T	user_digraphs = {0, 0, (int)sizeof(digr_T), 10, NULL};
  * compilers cannot handle them (Amiga SAS/C is the most picky one).
  */
 static digr_T digraphdefault[] =
-#if defined(MSDOS) || defined(OS2)
+#if defined(MSDOS)
 	/*
 	 * MSDOS digraphs.
 	 */
@@ -105,7 +105,7 @@ static digr_T digraphdefault[] =
 	{NUL, NUL, NUL}
 	};
 
-#else	/* !MSDOS && !OS2 */
+#else	/* !MSDOS */
 # ifdef __MINT__
 
 	/*
@@ -2007,7 +2007,7 @@ static digr_T digraphdefault[] =
 #   endif /* EBCDIC */
 #  endif    /* !HPUX_DIGRAPHS */
 # endif	/* !__MINT__ */
-#endif	/* !MSDOS && !OS2 */
+#endif	/* !MSDOS */
 
 /*
  * handle digraphs after typing a character
diff --git a/src/eval.c b/src/eval.c
index eca8224ebf..8b972dfe78 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -12791,9 +12791,6 @@ f_has(argvars, rettv)
 #if defined(MACOS_X_UNIX)
 	"macunix",
 #endif
-#ifdef OS2
-	"os2",
-#endif
 #ifdef __QNX__
 	"qnx",
 #endif
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 73a55641ad..f3cb4b4069 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -1570,7 +1570,7 @@ make_filter_cmd(cmd, itmp, otmp)
     char_u	*buf;
     long_u	len;
 
-#if (defined(UNIX) && !defined(ARCHIE)) || defined(OS2)
+#if defined(UNIX) && !defined(ARCHIE)
     int		is_fish_shell;
     char_u	*shell_name = get_isolated_shell_name();
 
@@ -1590,7 +1590,7 @@ make_filter_cmd(cmd, itmp, otmp)
     if (buf == NULL)
 	return NULL;
 
-#if (defined(UNIX) && !defined(ARCHIE)) || defined(OS2)
+#if defined(UNIX) && !defined(ARCHIE)
     /*
      * Put braces around the command (for concatenated commands) when
      * redirecting input and/or output.
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 31b51e99d6..0e8e7bda10 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -3794,7 +3794,7 @@ set_one_cmd_context(xp, buff)
 
 	/* Check for environment variable */
 	if (*xp->xp_pattern == '$'
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 		|| *xp->xp_pattern == '%'
 #endif
 		)
@@ -5073,7 +5073,7 @@ expand_filename(eap, cmdlinep, errormsgp)
 		 * For Unix and OS/2, when wildcards are expanded, this is
 		 * done by ExpandOne() below.
 		 */
-#if defined(UNIX) || defined(OS2)
+#if defined(UNIX)
 		if (!has_wildcards)
 #endif
 		    backslash_halve(eap->arg);
diff --git a/src/ex_getln.c b/src/ex_getln.c
index b6aeacf1a9..391946623e 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -4955,7 +4955,7 @@ expand_shellcmd(filepat, num_file, file, flagsarg)
 	if (*s == ' ')
 	    ++s;	/* Skip space used for absolute path name. */
 
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 	e = vim_strchr(s, ';');
 #else
 	e = vim_strchr(s, ':');
diff --git a/src/feature.h b/src/feature.h
index c499d9d50a..c2bf2605d8 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -60,7 +60,7 @@
  */
 #if !defined(FEAT_TINY) && !defined(FEAT_SMALL) && !defined(FEAT_NORMAL) \
 	&& !defined(FEAT_BIG) && !defined(FEAT_HUGE)
-# if defined(MSWIN) || defined(DJGPP) || defined(OS2) || defined(VMS) || defined(MACOS) || defined(AMIGA)
+# if defined(MSWIN) || defined(DJGPP) || defined(VMS) || defined(MACOS) || defined(AMIGA)
 #  define FEAT_BIG
 # else
 #  ifdef MSDOS
@@ -1046,7 +1046,7 @@
  * +mouse		Any mouse support (any of the above enabled).
  */
 /* OS/2 and Amiga console have no mouse support */
-#if !defined(AMIGA) && !defined(OS2)
+#if !defined(AMIGA)
 # ifdef FEAT_NORMAL
 #  define FEAT_MOUSE_XTERM
 # endif
diff --git a/src/fileio.c b/src/fileio.c
index 9224777711..362d82ee05 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -445,7 +445,7 @@ readfile(fname, sfname, from, lines_to_skip, lines_to_read, eap, flags)
 	    return FAIL;
 	}
 #endif
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 	/*
 	 * MS-Windows allows opening a device, but we will probably get stuck
 	 * trying to read it.
@@ -526,7 +526,7 @@ readfile(fname, sfname, from, lines_to_skip, lines_to_read, eap, flags)
     file_readonly = FALSE;
     if (read_stdin)
     {
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 	/* Force binary I/O on stdin to avoid CR-LF -> LF conversion. */
 	setmode(0, O_BINARY);
 #endif
@@ -3553,7 +3553,7 @@ buf_write(buf, fname, sfname, start, end, eap, append, forceit,
     }
     if (c == NODE_WRITABLE)
     {
-# if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+# if defined(MSDOS) || defined(MSWIN)
 	/* MS-Windows allows opening a device, but we will probably get stuck
 	 * trying to write to it.  */
 	if (!p_odev)
@@ -6055,7 +6055,7 @@ shorten_fname(full_path, dir_name)
     if (fnamencmp(dir_name, full_path, len) == 0)
     {
 	p = full_path + len;
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 	/*
 	 * MSDOS: when a file is in the root directory, dir_name will end in a
 	 * slash, since C: by itself does not define a specific dir. In this
@@ -6072,7 +6072,7 @@ shorten_fname(full_path, dir_name)
 #endif
 	}
     }
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
     /*
      * When using a file in the current drive, remove the drive name:
      * "A:\dir\file" -> "\dir\file".  This helps when moving a session file on
@@ -6330,7 +6330,7 @@ buf_modname(shortname, fname, ext, prepend_dot)
 	else if ((int)STRLEN(e) + extlen > 4)
 	    s = e + 4 - extlen;
     }
-#if defined(OS2) || defined(USE_LONG_FNAME) || defined(WIN3264)
+#if defined(USE_LONG_FNAME) || defined(WIN3264)
     /*
      * If there is no file name, and the extension starts with '.', put a
      * '_' before the dot, because just ".ext" may be invalid if it's on a
diff --git a/src/getchar.c b/src/getchar.c
index f4ec991b09..70829e18ef 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -962,8 +962,8 @@ init_typebuf()
 }
 
 /*
- * insert a string in position 'offset' in the typeahead buffer (for "@r"
- * and ":normal" command, vgetorpeek() and check_termcode())
+ * Insert a string in position 'offset' in the typeahead buffer (for "@r"
+ * and ":normal" command, vgetorpeek() and check_termcode()).
  *
  * If noremap is REMAP_YES, new string can be mapped again.
  * If noremap is REMAP_NONE, new string cannot be mapped again.
@@ -5295,7 +5295,7 @@ check_map(keys, mode, exact, ign_mod, abbr, mp_ptr, local_ptr)
 }
 #endif
 
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2) || defined(MACOS)
+#if defined(MSDOS) || defined(MSWIN) || defined(MACOS)
 
 #define VIS_SEL	(VISUAL+SELECTMODE)	/* abbreviation */
 
@@ -5308,7 +5308,7 @@ static struct initmap
     int		mode;
 } initmappings[] =
 {
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 	/* Use the Windows (CUA) keybindings. */
 # ifdef FEAT_GUI
 	/* paste, copy and cut */
@@ -5379,7 +5379,7 @@ static struct initmap
     void
 init_mappings()
 {
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2) || defined(MACOS)
+#if defined(MSDOS) || defined(MSWIN) ||defined(MACOS)
     int		i;
 
     for (i = 0; i < sizeof(initmappings) / sizeof(struct initmap); ++i)
@@ -5387,7 +5387,7 @@ init_mappings()
 #endif
 }
 
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2) \
+#if defined(MSDOS) || defined(MSWIN) \
 	|| defined(FEAT_CMDWIN) || defined(MACOS) || defined(PROTO)
 /*
  * Add a mapping "map" for mode "mode".
diff --git a/src/globals.h b/src/globals.h
index f0879dc670..d921a4e246 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -19,7 +19,7 @@
  */
 EXTERN long	Rows			/* nr of rows in the screen */
 #ifdef DO_INIT
-# if defined(MSDOS) || defined(WIN3264) || defined(OS2)
+# if defined(MSDOS) || defined(WIN3264)
 			    = 25L
 # else
 			    = 24L
@@ -1534,7 +1534,7 @@ EXTERN char_u e_sandbox[]	INIT(= N_("E48: Not allowed in sandbox"));
 #endif
 EXTERN char_u e_secure[]	INIT(= N_("E523: Not allowed here"));
 #if defined(AMIGA) || defined(MACOS) || defined(MSWIN)  \
-	|| defined(UNIX) || defined(VMS) || defined(OS2)
+	|| defined(UNIX) || defined(VMS)
 EXTERN char_u e_screenmode[]	INIT(= N_("E359: Screen mode setting not supported"));
 #endif
 EXTERN char_u e_scroll[]	INIT(= N_("E49: Invalid scroll size"));
diff --git a/src/macros.h b/src/macros.h
index caaca9a3ef..737eddf520 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -231,7 +231,7 @@
 #if defined(UNIX) || defined(VMS)  /* open in rw------- mode */
 # define mch_open_rw(n, f)	mch_open((n), (f), (mode_t)0600)
 #else
-# if defined(MSDOS) || defined(MSWIN) || defined(OS2)  /* open read/write */
+# if defined(MSDOS) || defined(MSWIN)  /* open read/write */
 #  define mch_open_rw(n, f)	mch_open((n), (f), S_IREAD | S_IWRITE)
 # else
 #  define mch_open_rw(n, f)	mch_open((n), (f), 0)
diff --git a/src/memline.c b/src/memline.c
index a1c07a967b..cd6d151e13 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -4211,8 +4211,7 @@ findswapname(buf, dirp, old_fname)
 #endif
     char_u	*buf_fname = buf->b_fname;
 
-#if !defined(SHORT_FNAME) \
-		&& ((!defined(UNIX) && !defined(OS2)) || defined(ARCHIE))
+#if !defined(SHORT_FNAME) && (!defined(UNIX) || defined(ARCHIE))
 # define CREATE_DUMMY_FILE
     FILE	*dummyfd = NULL;
 
@@ -4272,7 +4271,7 @@ findswapname(buf, dirp, old_fname)
 	    fname = NULL;
 	    break;
 	}
-#if (defined(UNIX) || defined(OS2)) && !defined(ARCHIE) && !defined(SHORT_FNAME)
+#if defined(UNIX) && !defined(ARCHIE) && !defined(SHORT_FNAME)
 /*
  * Some systems have a MS-DOS compatible filesystem that use 8.3 character
  * file names. If this is the first try and the swap file name does not fit in
@@ -4323,10 +4322,6 @@ findswapname(buf, dirp, old_fname)
 		    {
 			f1 = mch_open_rw((char *)fname,
 					       O_RDWR|O_CREAT|O_EXCL|O_EXTRA);
-#if defined(OS2)
-			if (f1 < 0 && errno == ENOENT)
-			    same = TRUE;
-#endif
 			created1 = TRUE;
 		    }
 		    if (f1 >= 0)
diff --git a/src/misc1.c b/src/misc1.c
index 5190db4a13..d1e762c9a7 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -3856,7 +3856,7 @@ init_homedir()
 # endif
 #endif
 
-#if defined(OS2) || defined(MSDOS) || defined(MSWIN)
+#if defined(MSDOS) || defined(MSWIN)
     /*
      * Default home dir is C:/
      * Best assumption we can make in such a situation.
@@ -3995,7 +3995,7 @@ expand_env_esc(srcp, dst, dstlen, esc, one, startstr)
 		    && at_start
 #endif
 	   )
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 		|| *src == '%'
 #endif
 		|| (*src == '~' && at_start))
@@ -4024,21 +4024,16 @@ expand_env_esc(srcp, dst, dstlen, esc, one, startstr)
 #endif
 		{
 		    while (c-- > 0 && *tail != NUL && ((vim_isIDc(*tail))
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 			    || (*src == '%' && *tail != '%')
 #endif
 			    ))
 		    {
-#ifdef OS2		/* env vars only in uppercase */
-			*var++ = TOUPPER_LOC(*tail);
-			tail++;	    /* toupper() may be a macro! */
-#else
 			*var++ = *tail++;
-#endif
 		    }
 		}
 
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2) || defined(UNIX)
+#if defined(MSDOS) || defined(MSWIN) || defined(UNIX)
 # ifdef UNIX
 		if (src[1] == '{' && *tail != '}')
 # else
@@ -4056,7 +4051,7 @@ expand_env_esc(srcp, dst, dstlen, esc, one, startstr)
 #endif
 		    *var = NUL;
 		    var = vim_getenv(dst, &mustfree);
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2) || defined(UNIX)
+#if defined(MSDOS) || defined(MSWIN) || defined(UNIX)
 		}
 #endif
 	    }
@@ -4249,7 +4244,7 @@ vim_getenv(name, mustfree)
     char_u	*pend;
     int		vimruntime;
 
-#if defined(OS2) || defined(MSDOS) || defined(MSWIN)
+#if defined(MSDOS) || defined(MSWIN)
     /* use "C:/" when $HOME is not set */
     if (STRCMP(name, "HOME") == 0)
 	return homedir;
@@ -5000,7 +4995,7 @@ get_past_head(path)
 {
     char_u  *retval;
 
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
     /* may skip "c:" */
     if (isalpha(path[0]) && path[1] == ':')
 	retval = path + 2;
@@ -10882,7 +10877,7 @@ has_env_var(p)
 	if (*p == '\\' && p[1] != NUL)
 	    ++p;
 	else if (vim_strchr((char_u *)
-#if defined(MSDOS) || defined(MSWIN) || defined(OS2)
+#if defined(MSDOS) || defined(MSWIN)
 				    "$%"
 #else
 				    "$"
diff --git a/src/misc2.c b/src/misc2.c
index beb3d4662e..f13a80e223 100644
--- a/src/misc2.c
+++ b/src/misc2.c