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Description of problem:
In order to support the threads extension and therefore allow threaded Tcl code, would you enable threads (using %configure --enable-threads)?
If you are interested, here is the tcl-threads extension spec:

Name: tcl-threads
Version: 2.6.2
Release: 1%{?dist}
Summary: The thread extension for Tcl.
Group: Development/Languages
License: BSD
URL: http://tcl.sourceforge.net/
Source0: http://download.sourceforge.net/tcl/thread2.6.2.tar.gz
BuildRoot: %_tmppath/%name-%version-%release-root-%(%__id_u -n)
BuildRequires: tcl-devel >= 8.4.12
Requires: tcl >= 8.4.12

%description
The thread extension creates threads that contain Tcl interpreters,
and it lets you send scripts to those threads.

%prep
%setup -c thread%version

%build
cd thread%version
%configure --with-tcl=%_libdir --exec-prefix=%_libdir
make %{?_smp_mflags}

%install
rm -rf $RPM_BUILD_ROOT
cd thread%version
make install DESTDIR=$RPM_BUILD_ROOT

%clean
rm -rf $RPM_BUILD_ROOT

%files
%defattr(-,root,root,-)
%_libdir/thread%version/
%_mandir/mann/


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. irrelevant
2.
3.
  

Additional info: