problems with running 32-bit tclsh on Windows x64
- From: rpremuz@xxxxxxxxx
- Date: 4 Apr 2007 08:06:36 -0700
Hi!
On a MS Windows XP Pro. x64 (64-bit) Edition I installed ActiveState
ActiveTcl 8.4.14.0 (the 32-bit x86 distribution that is available as a
free download).
I noticed problems with invoking some system tools from the Tcl
scripts (which run in a 32-bit tclsh process). The problems are caused
by the way the WOW64 subsystem works in Windows x64. Namely,
the "%SystemRoot%\system32" directory is used for 64-bit DLLs and
EXEs, while
the "%SystemRoot%\SysWOW64" directory is used for 32-bit DLLs and
EXEs.
Some of the system files are present in both directories, i.e. they
have
64-bit and 32-bit versions, but some have only 64-bit version.
When executing 32-bit applications, the WOW64 subsystem makes files in
%SystemRoot%\system32 inaccessible to the application. The
application sees %SystemRoot%\sysWOW64 as %SystemRoot%\system32.
For example it is not possible to invoke ntbackup.exe from a Tcl
script as there is only 64-bit version of ntbackup.exe (in
%SystemRoot%\system32).
Is there a workaround for this problem besides copying the
inaccessible files from %SystemRoot%\system32 to another directory
that is accessible to 32-bit applications?
I hope some day the 64-bit binary distributions of the ActiveTcl
package will be available as a free download.
-- rpr. /Robert Premuz/
.
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