# TIP 549: Make configure --enable-64bit the default
	Author:         Jan Nijtmans <jan.nijtmans@users.sf.net>
	Author:         Jan Nijtmans <jan.nijtmans@gmail.com>
	State:          Withdrawn
	Type:           Project
	Vote:           Pending
	Created:        7-June-2019
	Post-History:   
	Discussions-To: Tcl Core list
	Keywords:       Tcl
	Tcl-Version:    8.7
	Tcl-Branch:     tip-549
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# Abstract

This TIP proposes to make `--enable-64bit` the default

# Rationale

Since 64-bit systems are gradually taking over 32-bit systems, it makes sense to change the default from 32-bit to 64-bit.

# Specification

This document proposes:

 * If `configure` is run without `--enable-64bit` or `--disable-64bit`, then the script behaves
   as if --enable-64bit is given.

# Compatibility

If you want a 32-bit build, you should explicitly specify `--disable-64bit` with `configure`.
That will work with any Tcl version, older ones too.

# Reference Implementation

A reference implementation is available in  the **tip-549** branch.
<https://core.tcl-lang.org/tcl/timeline?r=tip-549>

# Copyright

This document has been placed in the public domain.
