[CMake] FindModules vs EXEC_PROGRAM

[Stephen Adler]

CMake folks...

I'm setting up a project using vxWidget and cmake. I've run across a 
configuration dilema. I've followed the instructions on how to use the 
wxWidgets file module .cmake as found in
${CMAKE_ROOT}/Modules/FindwxWidgets.cmake, but it does not seem to find 
my wxWidget install. (My guess is that I'm actually using wxGTK, which 
is the GTK port of wxWidget.)

wxWidget software is setup to use the wx-config command which dumps to 
stdout the various compialiation and ld switches needed to properly 
build a wxWidget application. So, I added the following lines to my 
CMakeLists.txt file.

EXEC_PROGRAM(wx-config ARGS --cxxflags OUTPUT_VARIABLE WXCXXFLAGS)
EXEC_PROGRAM(wx-config ARGS --libs OUTPUT_VARIABLE WXFLAGS)

SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WXCXXFLAGS}")

ADD_EXECUTABLE(wxHello wxHello.cpp)

TARGET_LINK_LIBRARIES(wxHello ${WXFLAGS})

This seems to work fine. Is there any reason I should avoid using the 
'execute wx-config program and stuff the output into CMAKE_CXX_FLAGS' 
method, and stick to using the more traditional method of including the 
Find module for wxWidgets?

Cheers. Steve.