[plplot] Determine itcl/itk versions automatically

[Orion Poplawski]

commit 1a448f10aa1901fdd749c553b66bf297d61660ee
Author: Orion Poplawski <orion at nwra.com>
Date:   Sat Feb 15 07:48:37 2014 -0700

    Determine itcl/itk versions automatically

 plplot.spec |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/plplot.spec b/plplot.spec
index 172286f..6158ee3 100644
--- a/plplot.spec
+++ b/plplot.spec
@@ -369,10 +369,10 @@ unset TERM
 printenv
 # We assume that tk version is the same as tcl, cannot check without DISPLAY
 tkver=$(echo 'puts [info patchlevel]; exit' | tclsh)
-# Hardcode for now - need a way to determine versions
-itclver=3.4
-itkver=3.4
-iwidgetsver=4.0.2
+# Hacks to determine versions without DISPLAY
+itclver=$(echo %{_libdir}/libitcl*.so | sed -e 's/.*\([0-9]\.[0-9]\)\.so/\1/')
+itkver=$(echo %{_libdir}/libitk*.so | sed -e 's/.*\([0-9]\.[0-9]\)\.so/\1/')
+iwidgetsver=$(echo %{_datadir}/tcl*/iwidgets* | sed -e 's/.*iwidgets//')
 %cmake .. \
         -DCMAKE_INSTALL_LIBDIR:PATH=%{_libdir} \
         -DF95_MOD_DIR:PATH=%{_fmoddir} \