[PATCH] build-aux/tcltk.m4: Simplify tclConfig.sh searching

Hi,

Even if my building system already has tclConfig.sh, configure script
still cannot find it,
because it is looking at the wrong places.

According to Tcl wiki article [1], the following Tcl code can give the
location of tclConfig.sh
directly:

[::tcl::pkgconfig get libdir,install]

So we can use it to simplify the searching rules in build-aux/tcltk.m4.

Tested on Fedora 25 and Ubuntu 14.04, looks like working on both systems.

Regards,
libin

ChangeLog

+2017-02-27  Lee Duhem  <[hidden email]>
+
+ * build-aux/tcltk.m4: Simplify tclConfig.sh searching


[1] http://wiki.tcl.tk/12968

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thank you. applied. Let's how this goes :)

holger


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