Tcl Source Code

Here is a patch to the current CVS that will
add the a TCL_THREADS variable to the generated
tclConfig.sh file. This will provide a way for
an extension to find out if Tcl was compiled
with thread support. It may not be possible to
run some extensions without a thread enabled
Tcl core, Tcl Blend is a good example. This change
means the error condition of not compiling Tcl
with --enable-threads can be detected when the
extension is configured.

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I made the change you suggested to the AC_SUBST() and
checked the patch in.

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In the unix/tcl.m4, don't we need just one AC_SUBST outside 
of the if/else?

I think this should go in.  Tcl also defines "tcl_platform
(threads)", but the way it does it is to only set it to one 
if we are a threaded build.  The var should always exist, 
and be set to 0/1 depending on the build.  We should really 
have most of tclConfig.sh set in tcl_platform (or a 
new ::tcl::build var).  Anyway, that's an aside to the fact 
that this is a step in the right direction.

File Added - 5660: threads.patch