[Cmake] MSDev multiple build types

[Dekeyser, Kris]

Our project uses some 3rd party libraries that have different paths and
names depending on the build type. (e.g. Xerces-C)

MSDev has multi-config project files but CMake unfortunately can not know in
advance which build type will be choosen. This makes it difficult (if not
impossible) to write a TARGET_LINK_LIBRARIES statement for that library.

I therefore wanted to force the MSDev user to choose in advance which build
type will be used. I wrote the following code in my root CMakeLists.txt:

OPTION(DEBUG_BUILD "Build for debug?" TRUE)
IF(DEBUG_BUILD)
  SET(DebugBuild TRUE)
  SET(CMAKE_BUILD_TYPE Debug)
ELSE(DEBUG_BUILD)
  SET(DebugBuild FALSE)
  SET(CMAKE_BUILD_TYPE Release)
ENDIF(DEBUG_BUILD)

That's working fine, but still the developer can select another build type
in the MSDev environment and that will point the library to the wrong
libraries. So I added the following:

# MsDev's multiple configurations screw up things with libraries that have
different name and/or paths depending on the build configuration
SET(CMAKE_CONFIGURATION_TYPES ${CMAKE_BUILD_TYPE})

Hoping this would disable the generation of the not-relevant build types. To
my disappointment that did not change anything.

"Mastering CMake" chapter 3.5 says: "[...] The variable
CMAKE_CONFIGURATION_TYPES is used to tell CMake which configurations to put
in the workspace.[...]". Am I misinterpreting this or is this a bug in
CMake?

Best regards, Kris.
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