Tcl Source Code: View Ticket

Ticket UUID:	1230558
Title:	confusing 64bit warning
Type:	Bug	Version:	obsolete: 8.4.11
Submitter:	wart	Created on:	2005-06-30 19:24:58
Subsystem:	53. Configuration and Build Tools	Assigned To:	hobbs
Priority:	5 Medium	Severity:
Status:	Closed	Last Modified:	2006-11-26 13:07:01
Resolution:	Fixed	Closed By:	das
		Closed on:	2006-11-26 06:07:01
Description:	When building tcl 8.4.11 on x86_64 Fedore Core {3,4}, configure claims that it doesn't know how to do 64bit: # ./configure --enable-64bit [...] checking if 64bit support is requested... yes checking if 64bit Sparc VIS support is requested... no checking system version (for dynamic loading)... Linux-2.6.11-1.1369_FC4smp checking for dlopen in -ldl... yes checking for ar... ar configure: warning: 64bit support being disabled -- don't know magic for this platform [...] And yet, 'make' proceeds with no problems other than a few warnings about casting pointers to integers. 'file' claims that the resulting executable is 64-bit: # file ./tclsh tclsh: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped I get the same results if I leave off the --enable-64bit. My questions about this are: Is the --enable-64bit switch necessary on FC{3,4}? Can we somehow remove the '64bit support being disabled' warning from configure?
User Comments:	das added on 2006-11-26 13:07:01: Logged In: YES user_id=90580 Originator: NO fixed by patch 1597389 mic42 added on 2006-08-03 06:38:18: Logged In: YES user_id=302287 Short answer: No, you don't need the --enable-64bit switch on AMD x86_64 linux, as your gcc creates 64-bit executables by default, its just for those platforms where the OS is 64-bit, but executables are usually built as 32-bit versions, to force a 64-bit version of Tcl. The warning could be fixed/removed by some changes to the tcl.m4 file.