[cmake-developers] Supporting versioned wx-config in FindwxWidgets.cmake

[Alan W. Irwin]

I see that support for versioned wx-config has started in cmake-3.3.0
as can be seen from the following diff against an older version.

--- cmake-3.2.3/Modules/FindwxWidgets.cmake     2015-06-01 08:56:08.000000000 -0700
+++ cmake-3.3.0-rc1/Modules/FindwxWidgets.cmake 2015-06-04 07:53:42.000000000 -0700
@@ -740,7 +740,7 @@
      # UNIX: Start actual work.
      #-----------------------------------------------------------------
      # Support cross-compiling, only search in the target platform.
-    find_program(wxWidgets_CONFIG_EXECUTABLE wx-config
+    find_program(wxWidgets_CONFIG_EXECUTABLE wx-config wx-config-3.0
        DOC "Location of wxWidgets library configuration provider binary (wx-config)."
        ONLY_CMAKE_FIND_ROOT_PATH
        )

However, that change does not go for enough.  In particular, Cygwin right now
uses wx-config-2.8 in their wxwidgets-2.8 package.  And I presume others
require wxwidgets-2.9 (as can be seen from other versioned bits of
FindwxWidgets.cmake).  Finally, the usual CMake philosophy for finding order
is most specific first (in descending order of versions) then generic.

So I recommend for 3.3.0 final the above list of

wx-config wx-config-3.0

be changed to

wx-config-3.0 wx-config-2.9 wx-config-2.8 wx-config

I could transform this into an official change request, but it is such
a no-brainer I hope I don't have to go through that process to get
this into cmake-3.3.0

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.sf.net); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
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