Updated CMake script. [skip ci]

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0)
 
-set (CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 11)
 
 set(SIMVOLEON_MAJOR_VERSION 2)
 set(SIMVOLEON_MINOR_VERSION 1)
@@ -77,7 +77,7 @@ function(executable executable_name)
     target_compile_options(${executable_name} PUBLIC "-fsanitize=address")
     set_target_properties(${executable_name} PROPERTIES LINK_FLAGS "-fsanitize=address")
   endif()
-endfunction(executable)
+endfunction()
 
 function(report_prepare)
   set(multiValueArgs IF_APPLE IF_WIN32)
@@ -91,7 +91,7 @@ function(report_prepare)
   list(APPEND res ${REPORT_UNPARSED_ARGUMENTS})
   list(APPEND PACKAGE_OPTIONS ${res})
   set(PACKAGE_OPTIONS "${PACKAGE_OPTIONS}" PARENT_SCOPE)
-endfunction(report_prepare)
+endfunction()
 
 # ############################################################################
 # Provide options to customise the build
@@ -125,30 +125,21 @@ find_package(OpenGL REQUIRED) # FIXME really needed?
 find_package(Coin REQUIRED)
 if (SIMVOLEON_BUILD_TESTS)
   set(Gui "Qt" CACHE STRING "Target GUI for the example code")
-  set(GuiValues "Qt;Xt;Win;Wx" CACHE INTERNAL "List of possible values for the GUI cache variable")
+  set(GuiValues "Qt;Xt;Win;Wx" CACHE INTERNAL "List of supported values for the GUI cache variable")
   set_property(CACHE Gui PROPERTY STRINGS ${GuiValues})
   message(STATUS "Example Gui set to '${Gui}'")
   if (Gui STREQUAL "Qt")
     message(WARNING "SoQt GUI binding examples WILL CRASH")
-    set(GUI QT)
-    find_package(SoQt)
-    set(EXAMPLE_LINK_LIB SoQt::SoQt)
   elseif(Gui STREQUAL "Xt")
-    set(GUI XT)
-    find_package(SoXt)
-    set(EXAMPLE_LINK_LIB SoXt::SoXt)
   elseif(Gui STREQUAL "Wx")
-    set(GUI WX)
-    find_package(SoWx)
-    set(EXAMPLE_LINK_LIB SoWx::SoWx)
   elseif(Gui STREQUAL "Win")
     message(WARNING "SoWin GUI binding NOT TESTED")
-    set(GUI WIN)
-    find_package(SoWin)
-    set(EXAMPLE_LINK_LIB SoWin::SoWin)
   else()
     message(FATAL_ERROR "Only Qt,Win, Wx and Xt supported: please set Gui at one of these values")
   endif()
+  string(TOUPPER ${Gui} GUI)
+  find_package(So${Gui})
+  set(EXAMPLE_LINK_LIB So${Gui}::So${Gui})
   find_package(GLUT) # needed only for testcode/tabula/glutclut.c
 endif()