[Tcl-bugs] [ tcl-Bugs-1230558 ] confusing 64bit warning

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Bugs item #1230558, was opened at 2005-06-30 19:24
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Wart (wart)
Assigned to: Nobody/Anonymous (nobody)
Summary: confusing 64bit warning

Initial Comment:
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? 

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