Tcl Source Code

File List
Bounty program for improvements to Tcl and certain Tcl packages.
Tcl 2019 Conference, Houston/TX, US, Nov 4-8
Send your abstracts to [email protected]
or submit via the online form by Sep 9.

Files of check-in [84d2435115] in directory win   [history]

Tcl 9.0 for Windows

1. Introduction

This is the directory where you configure and compile the Windows
version of Tcl.  This directory also contains source files for Tcl
that are specific to Microsoft Windows.

The information in this file is maintained on the web at:

2. Compiling Tcl

In order to compile Tcl for Windows, you need the following:

	Tcl 9.0 Source Distribution (plus any patches)


	Visual C++ 6 or newer


	Linux + MinGW-w64 []
	    (win32 or win64)


	Cygwin + MinGW-w64 []
	    (win32 or win64)


	Darwin + MinGW-w64 []
	    (win32 or win64)


	Msys + MinGW-w64 []
	    (win32 or win64)


	Msys + MinGW []
	    (win32 only)

In practice, this release is built with Visual C++ 6.0 and the TEA

If you are building with Visual C++, in the "win" subdirectory of the
source release, you will find "".  This is the makefile for the
Visual C++ compiler and uses the stock NMAKE tool.  Detailed directions for
using it, are in the comments of "".  A quick example would be:

	C:\tcl_source\win\>nmake -f

There is also a Developer Studio workspace and project file, too, if you
would like to use them.

If you are building with Linux, Cygwin or Msys, you can use the configure
script that lives in the win subdirectory. The Linux/Cygwin/Msys based
configure/build process works just like the UNIX one, so you will want
to refer to ../unix/README for available configure options.

If you want 64-bit executables (x86_64), you need to configure using
the --enable-64bit option. Make sure that the x86_64-w64-mingw32
compiler is present. For Cygwin this compiler can be found in the
"mingw64-x86_64-gcc-core" package, which can be installed through
the normal Cygwin install process. If you only want 32-bit executables,
the "mingw64-i686-gcc-core" package is what you need. For Linux, Darwin
and Msys, you can download a suitable win32 or win64 compiler from

Use the Makefile "install" target to install Tcl.  It will install it
according to the prefix options you provided in the correct directory

Note that in order to run tclsh90.exe, you must ensure that tcl90.dll is
on your path, in the system directory, or in the directory containing

Note: Tcl no longer provides support for Win32s.

3. Test suite

This distribution contains an extensive test suite for Tcl.  Some of the
tests are timing dependent and will fail from time to time.  If a test is
failing consistently, please send us a bug report with as much detail as
you can manage to our tracker:

In order to run the test suite, you build the "test" target using the
appropriate makefile for your compiler.