Merge branch '3960_remove_mmap'

Signed-off-by: Yury V. Zaytsev <yury@shurup.com>

configure.ac

@@ -320,19 +320,6 @@ dnl replacing lstat with statlstat on sco makes it more portable between
 dnl sco clones
 AC_CHECK_FUNCS(statlstat)
 
-dnl Overriding mmap support.  This has to be before AC_FUNC_MMAP is used.
-dnl We use only part of the functionality of mmap, so on AIX,
-dnl it's possible to use mmap, even if it doesn't pass the autoconf test.
-AC_ARG_WITH([mmap],
-	AS_HELP_STRING([--with-mmap], [Use the mmap call @<:@yes if found@:>@]))
-if test x$with_mmap != xno; then
-    if test x$with_mmap = x; then
-	AC_FUNC_MMAP
-    else
-	AC_DEFINE(HAVE_MMAP, 1)
-    fi
-fi
-
 mc_GET_FS_INFO
 
 

doc/INSTALL

@@ -1,13 +1,5 @@
-This file contains:
-
-- Build requirements for GNU Midnight Commander
-- Installation instructions for GNU Midnight Commander
-- Where to get more information on GNU Midnight Commander
-- Notes about GNU Midnight Commander installation
-- Obtaining related software
-
 Build requirements for GNU Midnight Commander
-----------------------------------------------------
+---------------------------------------------
 
 - glibc
 - gcc
@@ -26,6 +18,17 @@ Build requirements for GNU Midnight Commander
 Installation instructions for GNU Midnight Commander
 ----------------------------------------------------
 
+Midnight Commander is written in a portable manner and uses GNU Autoconf
+for configuration, so it is expected to compile without changes on many
+other operating systems.
+
+If you are installing from an official tarball, it already contains
+pre-bootstrapped autotools build system (specifically the `configure'
+script). In the case that you are installing from a version control
+checkout, you need to bootstrap the build system yourself first using
+the `autogen.sh' script. Note that to do this you would need to install
+the autotools suite first and not only direct mc build dependencies.
+
 The `configure' shell script attempts to guess correct values for
 various system-dependent variables used during compilation, and creates
 the makefiles.  It also creates a file `config.status' that you can run
@@ -36,14 +39,7 @@ To compile this package:
 1.  Configure the package for your system.
 
 Normally, you just `cd' to the directory containing the package's source
-code and type `./configure'.  If you're using `csh' on an old version of
+code and type `./configure'.
-SystemV, you might need to type `sh configure' instead to prevent `csh'
-from trying to execute `configure' itself.  Under AIX, you may need to
-use ksh instead of sh.
-
-Running `configure' takes a while.  While it is running, it prints some
-messages that tell what it is doing.  If you don't want to see any
-messages, run `configure' with the `--quiet' option.
 
 To compile the package in a different directory than the one containing
 the source code, you must use a version of `make' supporting the `VPATH'
@@ -58,13 +54,6 @@ By default, `make install' will install the package's files in
 installation prefix other than `/usr/local' by giving `configure' the
 option `--prefix=PATH'.
 
-You can specify separate installation prefixes for architecture specific
-files and architecture-independent files.  If you give `configure' the
-option `--exec-prefix=PATH', the package will use PATH as the prefix for
-installing binary programs and libraries.  Data files and documentation
-will still use the regular prefix.  Normally, all files are installed
-using the same prefix.
-
 If compiled on GNU/Linux, Midnight Commander detects if you have the gpm
 library installed.  If you installed the gpm mouse library in a
 non-standard place, you will need to use the --with-gpm-mouse flag with
@@ -103,12 +92,6 @@ incomplete, use `configure --help' to get the full list):
      building binaries for distribution purposes and may not work on
      some operating systems.
 
-`--with-mmap', `--without-mmap'
-     Force using or not using the mmap function.  It is currently used
-     in the internal viewer.  `--with-mmap' may be useful on some
-     versions of AIX where the `configure' script decides that mmap is
-     broken, but it's actually suitable for the internal viewer.
-
 `--with-subshell[=optional]', `--without-subshell' 
      The subshell support is by default turned on, you can disable
      this by using the --without-subshell option.  If you pass the
@@ -220,9 +203,6 @@ ncurses):
      Set path to ncurses library [default=/usr/lib]; make sense
      only if --with-screen=ncurses is used.
 
-Compiler options:
-- - - - - - - - -
-
 On systems that require unusual options for compilation or linking that
 the package's `configure' script does not know about, you can give
 `configure' initial values for variables by placing them in the command
@@ -230,131 +210,16 @@ line:
 
 ./configure CC='gcc -traditional' LIBS=-lposix
 
-Here are the variables that you might want to override when running
-`configure'.
-
- - Variable: CC
-     C compiler program.  The default is `gcc' if found, otherwise `cc'.
-
- - Variable: CFLAGS
-     The default flags used to build the program.
-
- - Variable: INSTALL
-     Program to use to install files.  The default is `install' if you
-     have it, `cp' otherwise.
-
-For these variables, any value given in the command line is added to the
-value that `configure' decides to use:
-
- - Variable: LIBS
-     Libraries to link with, in the form `-lfoo -lbar...'.
-
- - Variable: LDFLAGS
-     Linker flags, e.g. -L<lib dir> if you have libraries in a
-     nonstandard directory <lib dir>
-
- - Variable: CPPFLAGS
-     C/C++ preprocessor flags, e.g. -I<include dir> if you have
-     headers in a nonstandard directory <include dir>
-
-If you need to do unusual things to compile the package, we encourage
-you to figure out how `configure' could check whether to do them, and
-mail diffs or instructions to the address given in the README so we can
-include them in the next release.
-
 2.  Type `make' to compile the package.
 
 3.  Type `make install' to install programs, data files, and the
-documentation.  On GNU/Linux the console screen saver is installed as
+documentation.
-well.
 
-4.  You can remove the program binaries and object files from the source
+If you're on a GNU/Linux system, this will install the `cons.saver'
-directory by typing `make clean'.  If you want to clean the source tree
+utility, which allows the Midnight Commander to save and restore the
-completely, so that it contains only those files that should be packaged
+console contents.  This utility can be installed setuid root, but it's
-in the archive, issue `make distclean'.  If you've run configure in a
+only needed on systems where users cannot access /dev/vcsaN, where N is
-different directory than the source tree, distclean won't remove your
+the virtual console number, on which the uses is logged on.
-*.o and linked programs in that directory.
-
-5.  GNU Midnight Commander allows you to stay in the last current
-directory after exiting MC.  This is done with a shell function, the man
-page has more information about this.
-
-The file `configure.in' is used to create `configure' by a program
-called `autoconf'.  You only need it if you want to regenerate
-`configure' using a newer version of `autoconf'.
-
-
-Where to get more information on GNU Midnight Commander
--------------------------------------------------------
-
-There are two mailing lists for the program:
-
-mc@lists.midnight-commander.org:        Discussion on GNU Midnight Commander file manager.
-mc-devel@lists.midnight-commander.org:  Discussion between the developers of the program.
-
-To subscribe to the mailing lists, visit their respective pages:
-
-https://lists.midnight-commander.org/mailman/listinfo/mc/
-https://lists.midnight-commander.org/mailman/listinfo/mc-devel/
-
-
-Notes about GNU Midnight Commander installation
------------------------------------------------
-
-GNU Midnight Commander has been run in the following configurations:
-
-i386-*-linux
-sparc-*-linux
-alpha-*-linux
-powerpc-*-linux
-mips-dec-{open,net}bsd1.0
-mips-sgi-irix5.2
-mips-sgi-irix5.3
-powerpc-ibm-aix5.3.0.0 (IBM XL C, IBM XL C/C++)
-sparc-sun-sunos4.1
-sparc-sun-netbsd1.0
-sparc-sun-solaris2.3
-hppa-hp-hpux9
-hppa-hp-hpux7
-m68k-apple-aux
-mc88110-aviion-dgux5.4
-i386-*-bsdi2
-i386-*-freebsd4.3
-i386-*-openbsd2.9
-
-Midnight Commander is written in a portable manner and uses GNU Autoconf
-for configuration, so it is expected to compile without changes on many
-other operating systems.
-
-You will need an ANSI C Compiler (such as GCC) and glib library to
-compile the source.  GNU Midnight Commander now comes with the S-Lang
-screen manager, a fast screen manager, but you may want to use the
-already installed S-Lang or ncurses library.
-
-If you insist on using ncurses, it's recommended to use ncurses 4.1 and
-above, since the older versions don't support resizing in the xterm
-window.
-
-GNU Midnight Commander comes with the mouse support on xterms and in the
-Linux console.  In order to take advantage of the mouse support on the
-Linux console you will need the gpm mouse server (see the section
-"Obtaining related software" in this file).
-
-Once you get gpm, compile it and install it, then you will have to
-specify the `--with-gpm-mouse' flag to the configure program if you
-installed it in a non-standard directory.  If you installed the gpm
-package under /usr or /usr/local, you don't need to specify this flag;
-configure will find gpm for you.  The support for mice on xterms is
-always compiled in.
-
-We are working on further enhancements to the program, but we're not
-sure which ones must go first.  If you would like to point us in the
-Right Direction we will be glad to hear from you.
-
-If you happen to find a feature that doesn't do what you expect, please
-write to mc@lists.midnight-commander.org telling as much as you can
-about the problem you're experiencing.  Please don't send personal
-messages to the maintainers.
 
 
 Obtaining related software
@@ -366,7 +231,7 @@ glib
 The only "hard" dependency of GNU Midnight Commander is glib.  You can
 get glib from
 
-ftp://ftp.gnome.org/pub/gnome/sources/glib/
+* https://download.gnome.org/sources/glib/
 
 Minimal version of glib: 2.32.0
 Recommended version: 2.32.x and higher.
@@ -376,11 +241,9 @@ Newer versions may work, but haven't been tested.
 PCRE
 ----
 
-Both PCRE and PCRE2 libraries are supported.
+Both PCRE and PCRE2 libraries are supported. You can get PCRE from
 
-You can get PCRE from
+* https://www.pcre.org
-
-http://www.pcre.org/
 
 Terminal database
 -----------------
@@ -402,53 +265,32 @@ Screen libraries
 GNU Midnight Commander can use the included version of S-Lang, but you
 can get the latest version here:
 
-http://www.s-lang.org/
+* https://www.jedsoft.org/slang/
 
 Alternatively, you can use ncurses:
 
-http://www.gnu.org/software/ncurses/ncurses.html
+* https://invisible-island.net/ncurses/announce.html
 
 Mouse support
 -------------
 
 The general purpose mouse (gpm) daemon is available from
 
-http://unix.schottelius.org/gpm/
+* https://www.nico.schottelius.org/software/gpm/
 
-Compiler
+Porting
---------
+-------
 
-If your C compiler is not powerful enough to compile GNU Midnight
+Some less widespread UNIX systems like AIX or Solaris often come with their own
-Commander, you should report is as a bug to the GNU Midnight Commander
+implementations of make and relevant parts of the toolchain necessary to build
-team.  Sometimes there is no solution than upgrading to a modern and
+mc. While autotools abstract a lot of platform specific issues, you might
-free compiler - GCC (Compiler Collection):
+encounter unresolved problems while using the native toolchain.
 
-http://gcc.gnu.org/
+Often, GNU tools are shipped as a part of an additional software collection
+(/opt/freeware on AIX, or OpenCSW on Solaris). These tools are usually prefixed
+with the letter `g', e.g. `gmake' instead of `make'. If you are not really
+interested in building with the native toolchain, try to override tools causing
+problems like this:
 
-AIX
+./configure MAKE=gmake AR=gar
----
+gmake
-Currently you can not use gcc 4.2.4 (and probably other versions) on
-AIX to compile the S-Lang version. Please use IBM XL C or IBM XL C/C++
-instead.
-
-If you compile a ncurses version you need to set TERM=dtterm to get
-working color support. Furthermore it is important to specify the
---with-ncurses-includes/--with-ncurses-lib parameters because otherwise
-mc will pick up term.h from AIX which does not work with the ncurses
-library.
-
-The AIX S-Lang build was tested with S-Lang 2.0.7. Later versions may
-also work but are not tested yet.
-
-Here is an example for S-Lang, it is assumed that the S-Lang library
-is installed under /user/local and that you also want want to install
-to /usr/local:
-
-  export CC=cc_r
-  export CXX=xlC_r
-  export CONFIG_SHELL=/usr/bin/bash (if installed)
-  export SHELL=/usr/bin/bash        (if installed)
-
-  ./configure \
-     --prefix=/usr/local \
-     --with-screen=slang

doc/INSTALL.FAST

@@ -1,51 +0,0 @@
-Read the INSTALL file for the complete instructions. 
-
-GNU Midnight Commander requires glib2.
-
-GNU Midnight Commander uses the S-Lang screen library by default. It
-tries the S-Lang library installed on the system.  If it's not found,
-the included S-Lang sources are used.  It is also possible to use
-ncurses as the screen library.
-
-1. Configure the package for your system.
-
-Normally, you just `cd' to the package main directory and type
-`./configure'.
-
-The most often needed options to configure are following:
-
-`--prefix=PATH'
-	By default, `make install' will install the package's files
-	in `/usr/local/bin', `/usr/local/man', etc. or to `/usr/bin',
-	`/usr/man', etc. depending on the location of an old mc binary.
-	If you have none in your system, default will be `/usr/local'.
-	You can specify an installation prefix other than default by
-	giving `configure' the option `--prefix=PATH'.
-
-`--with-screen={slang|ncurses}'
-	Choose the library used to manage interaction with the terminal.
-	`slang' means S-Lang library already installed on the system,
-	`ncurses' means ncurses library already installed on the system.  
-	The installed S-Lang library is used by default if found.
-
-You may also want to specify CFLAGS for the compiler, even if it finds
-itself some defaults by typing e.g.
-
-./configure CFLAGS=-O3
-
-2. Type `make' to compile the package.
-
-3. Type `make install' to install programs, data files, and
-documentation.  You may need to run this command as root.
-
-If you're on a GNU/Linux system, this will install the `cons.saver'
-utility, which allows the Midnight Commander to save and restore the
-screen contents.  This utility can be installed setuid root, but it's
-only needed on systems where users cannot access /dev/vcsaN, where N is
-the virtual console number, on which the uses is logged on.
-
-If you're making a mc binary distribution for other people and want to
-package the whole installed tree, use `make install DESTDIR=PATH', which
-will make PATH the root for installation.
-
-4. Type `mc' and enjoy!

doc/MAINTAINERS

@@ -1 +0,0 @@
-Email: mc-devel@lists.midnight-commander.org

doc/MIRRORS.txt

@@ -1,10 +0,0 @@
-This is a list of sites known to mirror the Midnight Commander release.
-
-----------
-
-The Midnight Commander distribution is placed at:
-
- * http://ftp.osuosl.org/pub/midnightcommander/
- * ftp://ftp.osuosl.org/pub/midnightcommander/
-
------------

doc/Makefile.am

@@ -1,7 +1,7 @@
 DIST_SUBDIRS = hints man hlp
 SUBDIRS = hints man hlp
 
-DOCS = FAQ HACKING INSTALL INSTALL.FAST MAINTAINERS README.QNX MIRRORS.txt
+DOCS = FAQ HACKING INSTALL
 EXTRA_DIST = $(DX_CONFIG) doxygen-include.am $(DOCS)
 
 include doxygen-include.am

doc/README

@@ -1,12 +1,12 @@
 Contents
 --------
 
-Introduction
+* Introduction
-Dependencies
+* Dependencies
-Features
+* Features
-Mini-documentation
+* Mini-documentation
-Where to get more information
+* Where to get more information
-Reporting problems
+* Reporting problems
 
 
 Introduction
@@ -141,15 +141,19 @@ Where to get more information
 
 There is a webpage for GNU Midnight Commander at
 
-https://www.midnight-commander.org/
+* https://www.midnight-commander.org
 
 This page also has current information about mailing lists and some
 useful advices how to report bugs.
 
 You can download the latest version of GNU Midnight Commander from
 
-https://www.midnight-commander.org/downloads/
+* https://www.midnight-commander.org/downloads/
 
+The Midnight Commander distribution is placed at:
+
+* http://ftp.osuosl.org/pub/midnightcommander/
+* ftp://ftp.osuosl.org/pub/midnightcommander/
 
 Reporting problems
 ------------------
@@ -168,8 +172,6 @@ There are two mailing lists:
 Use mc-devel@ if you are prepared for a more technical discussion
 with the developers of the package, otherwise use mc@.
 
-Please don't sent HTML e-mail to either of those mailing lists.
-
 Include the output of "mc --version", the operating system and the
 distribution (if applicable) you are using, the compiler and the
 configure flags used to compile the program (if you know them).

doc/README.QNX

@@ -1,313 +0,0 @@
-Midnight Commander for QNX (not QNX Neutrino)
----------------------------------------------
-
-1. Compiling
-2. Running 'mc' under QNX
-3. List of modifications on mc-4.1.33
-4. TODO
-5. Contact information
-
-1. Compiling
-------------
-
-1.1 Make utility
-----------------
-
-Use 'gmake'. (This is the default 'make' under QNX 4.23+). [The old 'qmake'
-cannot handle the makefiles in the mc-source.]
-
-1.2 Configuring
----------------
-
-If you don't have an installed TCP/IP development kit, you have to 'hide'
-the library file 'socket3r.lib' (can be installed by e.g. Watcom C 10.6)
-in /usr/lib or /usr/watcom/10.6/usr/lib, because the existence of this file
-will confuse 'configure': it will erroneously assume you have the complete
-TCP/IP development kit (with headers) and will enable compiling of the
-network-related VFS code (not only tarfs).
-[A patch would be required in the configure-script to check the existence
-of the TCP/IP-related headers also...]
-
-Use '--disable-nls' option, if you don't have the binary utilities of
-GNU 'gettext' package (e.g. 'msgfmt'). ['--with-included-gettext' doesn't
-really work in 4.1.33, there are configuration/compiling problems...]
-
-1.3 Compiler
-------------
-
-It is advised to use Watcom C 10.6+ to compile the source, because older
-compilers (e.g. 9.52) do not support some convenient/required features.
-[e.g. 'ar'-compatible 'wlib',...]
-
-1.4 "No prototype found for '<function>'" warnings
---------------------------------------------------
-
-It is advised to use high warning level (e.g. 'CFLAGS="-w4" ./configure'),
-when compiling the source, because Watcom C uses a special parameter passing
-convention for functions with fixed number of arguments only. So if the
-compiler doesn't see the correct prototype of a function with variable
-number of arguments (like printf()), it will produce a warning about the
-missing prototype, but generates function call code according to the special
-parameter passing convention, not the required CDECL convention (it is used
-by default for functions with variable number of arguments). So the calling
-convention of the function call code and the function code itself will not
-match! So you MUST provide the correct prototype for function with variable
-number of arguments! (Or you can force using the stack-based calling
-convention as a default, if you have the stack-call-conv version of all of the
-required libraries ('<name>3s.lib')...[Watcom C 10.6 required!])
-
-[The latest release version (4.1.33/qnx) is checked against these types of
-missing prototypes...]
-
-1.5 Tested configuration
-------------------------
-
-QNX 4.24
-Watcom C 10.6 (release version, no newer beta patches)
-Photon 1.12
-no TCP/IP development kit (-> VFS: tarfs only!)
-mc-4.1.33, mc-4.1.34
-
-2. Running 'mc' under QNX
--------------------------
-
-Using 'qnx*' terminals:
-
-  You cannot use your keyboard correctly, if you disable the "Full 8 bits
-  input" feature in the 'Options|Display bits...' dialog.
-
-  On 'qnx*' terminals 'mc' will run in black and white mode by default,
-  because these types of terminals use non-ANSI-compatible color sequences.
-
-Accessing remote nodes via the native QNX-network:
-
-  [The problem exists under the older versions of 'mc' only...]
-  If directory panels cannot handle '//<node-id>' prefix in directory names,
-  use directory links in order to access remote nodes on the native QNX
-  network:
-
-        mkdir /net
-        ln -sf //1/ /net/1
-        ...
-
-Extension and menu files:
-
-  Default 'tar' uses 'stderr' (and not 'stdout' as its 'normal' output with
-  '-t' option.
-  
-  Default 'tar' is not a GNU 'tar', so does not understand '-z' option.
-
-Special key-mappings:
-
-  Restrictions of the META-? as Alt-? functionality:
-  [META-? as ESC-? will always work!!!]
-
-    Alt-TAB   -> Ctrl-TAB    (Alt-TAB reserved in Photon [1.12+])
-    Alt-ENTER -> Ctrl-ENTER  ('qnx*' terminals only)
-  
-    Alt-<uppercase letter>: doesn't work
-
-'qansi*' terminals:
-
-  Problem [QNX 4.23+ only]: screen corruption (strange line-drawing character
-  set handling) on 'qansi*' terminals, if linked with mc/Slang/terminfo
-  terminal management. (Older versions of QNX and Slang/termcap not affected.)
-
-  This problem is solved, see the comments in slang/sldisply.c about
-  SLTT_TRANSP_ACS_PATCH and QNX_QANSI_SLANG_COMPAT_ACS!
-
-other terminals:
-
-  I have tested 'mc' under QNX on 'qnx*' and 'qansi*' terminals only. 
-  
-toggle panels on/off (CTRL-o):
-
-  Currently not supported, but could be implemented later...
-
-3. List of modifications on mc-4.1.33/mc-4.1.34
------------------------------------------------
-
-edit/
-
- syntax.c: (4.1.33 only, fixed in 4.1.34)
-
-   line 100,191: WCC 10.6 doesn't like "<label>: }" construct ("no statement
-   after the label"), modified to "<label>: /*nop*/; }".
-
-lib/
-
-  mc.menu:
-
-    'Z' on 'tar.Z' and 'tar.z' files: '%f' -> '$1'.
-
-  mc.ext.in.qnx.diff:
-
-    QNX: modified 'mc.ext.in'. [tar -t: output to stderr,...]
-    
-    (No automatic install implemented: patch must be applied before
-    running 'configure' [->mc.ext.in.qnx.diff!]; this patch can be not
-    only QNX-specific...) 
-
-  Makefile.in:
-
-    'mc.ext.in.qnx.diff' added to DISTLIB.
-
-slang/
-
-  sldisply.c:
-
-    SLTT_TRANSP_ACS_PATCH dependent code:
-
-    The problem: some terminals (e.g. QNX/qansi*) map the whole upper half of
-    the ASCII table to the lower half, when alt-char-set is activated with
-    the smacs/as string-sequence. This means, that if 0 <= ch < 128 written
-    to the terminal, it will be translated to (ch+128) automatically by the
-    terminal: so not only the line-drawing characters can be written, when
-    the alt-char-set is activated. It implicitly means, that space, NL, CR,
-    etc. characters (exactly: anything besides the "standard" line drawing
-    characters) cannot be written directly to the terminal, when the
-    alt-char-set is activated, because writing these characters doesn't cause
-    an implicit/temporary switching-back to the standard char-set!
-   
-    The original code in SLang assumes that space, NL, CR, etc. can be
-    printed when alt-char-set is activated. If SLTT_TRANSP_ACS_PATCH is
-    defined, the modified code will not use this assumption.
-    [Remark: the patch-code is not the most exact solution, but works...]
-
-    QNX_QANSI_SLANG_COMPAT_ACS_PATCH dependent code:
-
-    A more OS/terminal-specific solution for the problem mentioned above
-    (->SLTT_TRANSP_ACS_PATCH).
-  
-    If QNX_QANSI_SLANG_COMPAT_ACS is defined, the default smacs/sa, rmacs/ae,
-    acsc/ac [and sgr/sa, if it would be used!] command sequences will be
-    replaced internally with the "old style" (pre-QNX 4.23) sequences in case
-    of QNX/qansi terminals. Using these optional command sequences the terminal
-    remains compatible with the original SLang code (without using the
-    workaround-code enabled by defining SLTT_TRANSP_ACS_PATCH).
-   
-    Remark:
-
-    Currently SLTT_TRANSP_ACS_PATCH is not auto-configured by 'configure'.
-    (Must be manually defined...)
-
-    There is some (QNX-specific) auto-configuration hand-coded in the source:
-
-        #ifdef SLTT_TRANSP_ACS_PATCH
-        # if defined(__QNX__) && defined(QNX_QANSI_SLANG_COMPAT_ACS)
-        #  undef SLTT_TRANSP_ACS_PATCH
-        # endif
-        #else
-        # if defined(__QNX__) && !defined(QNX_QANSI_SLANG_COMPAT_ACS)
-        #  define QNX_QANSI_SLANG_COMPAT_ACS 1
-        # endif
-        #endif
-
-  slutty.c:
-
-    "newtty.c_iflag &= ~(ECHO | INLCR | ICRNL);"
-
-    ECHO(0x08) is a c_lflag bit, it means PARMRK(0x08) in c_iflag. (!?!)
-
-src/
-
-  file.c:
-
-    'do_reget' can be extern if (ENABLE_VFS && USE_NETCODE), not if (ENABLE_VFS).
-
-  find.c:
-
-    search_content():
-    
-    variable 'i' "must be" 'int', not 'char'. ["i == -1": (buggy?) WCC 10.6
-    doesn't convert automatically (int)(-1) to (char)(-1) (GCC does), so
-    "comparison result always 0" warning produced. It is cleaner to define
-    'i' as 'int', than cast '-1' to 'char', because 'read()' returns 'int'.]
-    
-  key.c:
-
-    init_key():
-
-    Call load_xtra_key_defines() and clear 'use_8th_bit_as_meta' by default
-    under QNX, if a 'qnx*' terminal detected. (A saved config file (mc.ini)
-    can override it later...)
-
-  key.h:
-
-    Declare load_xtra_key_defines().
-
-  keyxdef.c:
-
-    Provides a method to define some platform-specific additional key
-    mappings. (e.g. QNX terminals can handle most of META-? combinations as
-    ALT-?...)
-    
-    (Currently not listed in doc/FILES...)
-
-  layout.c:
-
-    TIOCGWINSZ must be available (<sys/ioctl.h> included), because window-
-    resizing code doesn't work, if not defined.
-
-  main.c:
-
-    print_usage(): reserved name in the QNX run-time library!
-    print_usage() -> print_mc_usage()
-
-  mouse.c:
-
-    QNX: ncurses 1.9.8a ported to QNX doesn't provide the 'SP' pointer as a
-    global symbol in the library, so the keyok() emulation currently cannot
-    be used under QNX (4.24 & Watcom C 10.6 release version).
-
-  slint.c:
-
-    QNX: 'qansi*' terminals added to the color_terminals[] list.
-    
-  subshell.c:
-  utilunix.c:
-
-    QNX: include <unix.h> to get prototype for exec*()!!!
-    [See README.QNX/Section 1.4!]
-    
-  Makefile.in:
-
-    'keyxdef' module added to SRCS and OBJS.
-
-vfs/
-
-<mc-src-root>/
-
-  README.QNX:
-
-    QNX-specific notes...
-  
-  configure (line 3369):
-  configure.in (line 88):
-
-    (mc-4.1.34 only)
-    'test x$CCOPTS = x;' => 'test "x$CCOPTS" = x;'
-
-  Makefile.in:
-
-    README.QNX added to DISTMAIN.
-    
-4. TODO
--------
-
-Because of limited time and resources now I can define a 'wish list' only:
-(maybe somebody in the QNX community can help...)
-
-subshell support with panel switch on/off ?
-mouse under Photon (with qnxm, qansi-m terminals) ?
-...
-
-5. Contact information
-----------------------
-
-Please report QNX-specific bugs and comments via e-mail to: gt_cosy@usa.net
-
-
--------------
-Tamasi Gyorgy
--------------

doc/man/es/mc.1.in

@@ -1283,8 +1283,7 @@ El comando Compara directorios (Ctrl\-x d) compara los paneles de directorio
 uno con el otro. Podemos usar el comando Copiar (F5) para hacer ambos
 paneles idénticos. Hay tres métodos de comparación. El método rápido
 compara solo el tamaño de archivo y la fecha. El método completo realiza
-una comparación completa octeto a octeto. El método completo no está disponible si
+una comparación completa octeto a octeto. El método de comparación
-la máquina no soporta la llamada de sistema mmap(2). El método de comparación
 de solo tamaño solo compara los tamaños de archivo y no chequea los
 contenidos o las fechas, solo chequea los tamaños de los archivos.
 .PP
@@ -2780,13 +2779,6 @@ pueden entremezclar como en:
 .PP
 Nótese que 012 es un número octal y \-1 se convierte en 0xFF.
 .PP
-Algunos detalles internos del visualizador: En sistemas con acceso a la llamada
-del sistema mmap(2), el programa mapea el archivo en vez de cargarlo;
-si el sistema no provee de la llamada al sistema mmap(2) o el archivo
-realiza una acción que necesita de un filtro, entonces el visor usará
-sus cachés de crecimiento, cargando solo las partes del archivo
-a las que actualmente estamos accediendo (esto incluye a los archivos comprimidos).
-.PP
 He aquí una lista de las acciones asociadas a cada tecla que
 Midnight Commander gestiona en el visor interno de archivos.
 .PP

doc/man/hu/mc.1.in

@@ -1067,8 +1067,7 @@ A Könyvtár összehasonlítás (C\-x d) parancs összehasonlítja a könyvtár
 paneleket egymással. Ilyenkor használható a Másol (F5) parancs a panelek
 azonossá tételére. Ennek három formája van. A gyors változat csak a fájlok
 méretét, és dátumát vizsgálja meg. Az alapos változat teljesen, byte\-ról
-byte\-ra végzi el a vizsgálatot. Az alapos változat nem használható,
+byte\-ra végzi el a vizsgálatot. A 'Csak fájlhossz'
-ha a gép nem támogatja az mmap(2) rendszerhívást. A 'Csak fájlhossz'
 szerinti változat csak a fájlméretet hasonlítja össze és nem ellenőrzi
 le a dátumukat.
 .PP
@@ -2297,14 +2296,6 @@ Használhatsz kevert hivatkozást is ezen értékeknek megfelelően: "Szöveg"
 0xFE 0xBB "további szöveg". A szöveg értékek közötti részt és a
 hivatkozás szövegét nem veszi figyelembe.
 .PP
-Néhány belső részlet a fájlnézőről: Azokon a rendszereken, ahol létezik
-az mmap(2) rendszerhívás, a fájl programtérképe olvasódik be ehelyett;
-ha a rendszer nem tartalmazza az mmap(2) rendszerhívást, vagy a fájl
-tartalmaz olyan műveletet, mint ami megfelel a szűrőnek, a fájlnéző egy
-növekvő buffert fog használni, amely csak azokat a részeit tartalmazza a
-fájlnak, amelyekhez jelenleg hozzáférsz (ez tömörített fájlokra is
-vonatkozik).
-.PP
 Ez a lista tartalmazza azokat a gombokat, amelyekhez művelet kapcsolódik
 a Midnight Commander belső fájlnézőjében.
 .PP

doc/man/it/mc.1.in

@@ -1090,8 +1090,7 @@ pannelli directory uno con l'altro. E' poi possibile usare il comando
 Copia (F5) per rendere i pannelli identici. Ci sono tre metodi di
 confronto. Il metodo veloce confronta solo l'ampiezza e la data del
 file. Il metodo completo fa un confronto byte\-per\-byte. Il metodo
-completo non è disponibile se la macchina non supporta la chiamata di
+solo dimensione confronta solo l'ampiezza dei
-sistema mmap(2). Il metodo solo dimensione confronta solo l'ampiezza dei
 file e non controlla il contenuto né la data del file.
 .PP
 Il comando cronologia comandi mostra un'elenco dei comandi battuti. Il
@@ -2336,14 +2335,6 @@ mescolare testo protetto con costanti come nell'esempio:
 .PP
 Notare che 012 è un numero ottale. \-1 viene convertito in 0xFF.
 .PP
-Alcuni dettagli interni circa il visualizzatore: su sistemi che
-forniscono la chiamata di sistema mmap(2), il programma mappa il
-file invece di caricarlo; se il sistema non fornisce la chiamata di
-sistema mmap(2) o il file corrisponde ad un'azione che richiede
-un filtro, allora il visualizzatore userà i buffer di accrescimanto
-(growing), caricando perciò solo le parti del file su cui vi si accede
-(inclusi i file compressi).
-.PP
 Ecco un'elenco di azioni associate ad ogni tasto che il Midnight Commander
 gestisce nel visualizzatore di file interno.
 .PP

doc/man/mc.1.in

@@ -1241,8 +1241,7 @@ The "Compare directories" command compares the directory
 panels with each other. You can then use the Copy (F5) command to make
 the panels identical. There are three compare methods. The quick method
 compares only file size and file date. The thorough method makes a
-full byte\-by\-byte compare. The thorough method is not available if the
+full byte\-by\-byte compare. The size\-only
-machine does not support the mmap(2) system call.  The size\-only
 compare method just compares the file sizes and does not check the
 contents or the date times, it just checks the file size.
 .PP

doc/man/pl/mc.1.in

@@ -895,8 +895,7 @@ Komenda porównywania katalogów (Compare directories) (C\-x d) porównuje
 zawartości panelu katalogowego z drugim. Możesz potem użyc Kopiuj (F5)
 żeby stworzyć dwa dokładnie identyczne panele. Metoda "quick" porównuje
 tylko i wyłącznie rozmiary plików i ich daty. Metoda "thorough" porównuje
-pliki bajt po bajcie. Ta metoda działa tylko wtedy kiedy komputer obsługuje
+pliki bajt po bajcie. Metoda "size\-only" zwraca uwagę tylko na rozmiar plików.
-wywołanie mmap(2). Metoda "size\-only" zwraca uwagę tylko na rozmiar plików.
 Nie ma dla niej żadnego znaczenia czy plik ma inną datę lub zawartość, liczy
 się tylko rozmiar.
 .PP
@@ -1957,13 +1956,6 @@ Możesz mieszać ciągi znaków ze stałymi tak jak: "Ciąg" 0xFE 0xBB
 "więcej tekstu". Ciąg pomiędzy stałymi i cudzysłowami jest po prostu
 ignorowany.
 .PP
-Kilka wewnętrznych szczegółów na temat podglądu: Na systemach, które używają
-wywołania systemowego mmap(2), program mapuje pliki zamiast je ładować;
-jeśli system nie obsługuje mmap(2) lub plik pasuje do któregoś z wybranych
-filtrów, podgląd użyje jego rozszerzalnych buforów, dzięki temu ładując tylko
-te części, do których musisz mieć aktualnie dostęp (dotyczy również
-plików skompresowanych).
-.PP
 Tu jest lista akcji powiązanych z każdym klawiszem, który Midnight Commander
 obsługuje w wewnętrznym poglądzie.
 .PP

doc/man/ru/mc.1.in

@@ -1345,8 +1345,7 @@ Midnight Commander за счет добавления в личное меню
 для того, чтобы сделать содержимое каталогов одинаковым. Существует
 три метода сравнения. При быстром методе сравниваются только размер и
 дата создания файлов с одинаковыми именами. При побайтном методе
-сравнивается содержимое файлов (побайтно). Этот метод недоступен, если
+сравнивается содержимое файлов (побайтно). При сравнении по размеру
-машина не поддерживает системный вызов mmap(2). При сравнении по размеру
 сравниваются только размеры соответствующих файлов, а дата создания не
 проверяется.
 .PP
@@ -3277,14 +3276,6 @@ ASCII и шестнадцатеричный (hex). Для переключени
 можно просто ввести "BB". Число "012" интерпретируется не как
 восьмеричное, а как 0x12.
 .PP
-Некоторые детали внутренней реализации программы просмотра: на системах,
-которые предоставляют системный вызов mmap(2) программа отображает файл
-в память вместо его загрузки; иначе, а также если при вызове mmap
-возникает сбой или c файлом связано некоторое действие, которое требует
-фильтр, программа использует динамически распределяемые буфера памяти,
-загружая только те части файла, к которым вы обращаетесь (это относится
-к архивированным файлам).
-.PP
 Ниже приводится перечень всех клавиш и их комбинаций, с которыми
 ассоциированы некие действия встроенной программы просмотра.
 .TP

doc/man/sr/mc.1.in

@@ -1050,8 +1050,7 @@ file may be preallocated relative to preallocate_space configure option.
 једно са другим. Тада можете користити наредбу Копирај (F5) да бисте
 изједначили окна. Постоје три начина упоређивања. Брзи начин упоређује
 само величину и датум датотека. Темељни начин упоређује сваки бајт са
-сваким бајтом датотека. Темељни начин није доступан ако машина не
+сваким бајтом датотека. Начин упоређивања Само величина
-подржава системски позив mmap(2). Начин упоређивања Само величина
 упоређује само величине датотека, а не проверава садржаје или датуме
 датотека.
 .PP
@@ -2305,13 +2304,6 @@ linux би вас одвело у /usr/src/linux).
 .PP
 Приметите да је 012 октални број.  \-1 се претвара у 0xFF.
 .PP
-Ево још неких детаља о прегледачу: на системима који имају системски
-позив mmap(2), програм мапира датотеку уместо да је учита; уколико
-систем нема системски позив mmap(2) или датотека одговара радњи која
-захтева филтар, онда ће прегледач користити растуће прихватнике, тиме
-учитавајући само оне делове датотеке којима стварно приступате (овим
-су обухваћене и компримоване датотеке).
-.PP
 Ево списка радњи које су придружене тастерима које Поноћни наредник
 прихвата у уграђеном прегледачу.
 .PP

maint/utils/travis-build.sh

@@ -92,7 +92,6 @@ mkdir -p build-all-disabled && pushd $_
     --disable-nls \
     --disable-vfs \
     --disable-background \
-    --without-mmap \
     --without-x \
     --without-gpm-mouse \
     --without-internal-edit \

src/filemanager/cmd.c

@@ -91,6 +91,7 @@
 #include "boxes.h"              /* cd_box() */
 #include "dir.h"
 #include "cd.h"
+#include "ioblksize.h"          /* IO_BUFSIZE */
 
 #include "cmd.h"                /* Our definitions */
 
@@ -189,27 +190,7 @@ compare_files (const vfs_path_t *vpath1, const vfs_path_t *vpath2, off_t size)
         file2 = open (vfs_path_as_str (vpath2), O_RDONLY);
         if (file2 >= 0)
         {
-#ifdef HAVE_MMAP
+            char buf1[IO_BUFSIZE], buf2[IO_BUFSIZE];
-            char *data1;
-
-            /* Ugly if jungle */
-            data1 = mmap (0, size, PROT_READ, MAP_FILE | MAP_PRIVATE, file1, 0);
-            if (data1 != (char *) -1)
-            {
-                char *data2;
-
-                data2 = mmap (0, size, PROT_READ, MAP_FILE | MAP_PRIVATE, file2, 0);
-                if (data2 != (char *) -1)
-                {
-                    rotate_dash (TRUE);
-                    result = memcmp (data1, data2, size);
-                    munmap (data2, size);
-                }
-                munmap (data1, size);
-            }
-#else
-            /* Don't have mmap() :( Even more ugly :) */
-            char buf1[BUFSIZ], buf2[BUFSIZ];
             ssize_t n1, n2;
 
             rotate_dash (TRUE);
@@ -222,12 +203,12 @@ compare_files (const vfs_path_t *vpath1, const vfs_path_t *vpath2, off_t size)
             }
             while (n1 == n2 && n1 == sizeof (buf1) && memcmp (buf1, buf2, sizeof (buf1)) == 0);
             result = (n1 != n2) || memcmp (buf1, buf2, n1);
-#endif /* !HAVE_MMAP */
+            rotate_dash (FALSE);
+
             close (file2);
         }
         close (file1);
     }
-    rotate_dash (FALSE);
 
     return result;
 }