[CMake] How to add a lib in a target/tool independent way?

[Claus Klein]

I have a cpp project with some lib targets and executables, which  
depends on the libs and the header files.
I want to link the libs from my build/src tree and not the installed  
versions.

With this snip below from my CMakeFile.txt it works on my MacBook and  
cygwin after a make clean,
but with MVS2005, it will always try to link the desD.lib and not the  
desD.dll?

Note: When I first build static libs and than change the option to  
shared libs without make clean,
	   it find the static libs and use them what is not intended by me!
Q: is there a whay to control which libs are found (e.g.) only static  
or shared one?

AGENTPP_LIBRARY                  agent++
  AGENTXPP_LIBRARY                 agentx++
  BUILD_SHARED_LIBS                ON
  CMAKE_BUILD_TYPE
  CMAKE_INSTALL_PREFIX             /usr/local
  CMAKE_OSX_ARCHITECTURES
  CMAKE_OSX_DEPLOYMENT_TARGET      10.5
  CMAKE_OSX_SYSROOT                /Developer/SDKs/MacOSX10.5.sdk
  CMAKE_USE_RELATIVE_PATHS         OFF
  DES_LIBRARY                      des
  SNMP_PP_LIBRARY                  snmp++
  USE_DOXYGEN                      OFF
  USE_LIBDES                       ON
  USE_PROXY_FORWARDER              ON


#----------------------
option(BUILD_SHARED_LIBS "Build shared libraries" ON)
option(USE_LIBDES "Use the provided libdes implementation" ON)

set( CMAKE_DEBUG_POSTFIX "D" CACHE STRING "Postfix added to the debug  
version of libraries and executables" )

# add the libdes library?
if (USE_LIBDES)
   add_subdirectory (libdes)
   find_library(DES_LIBRARY des HINTS ${PROJECT_SOURCE_DIR}/libdes  
NO_DEFAULT_PATH)
   if ("${DES_LIBRARY}" STREQUAL "DES_LIBRARY-NOTFOUND")
     set (DES_LIBRARY "des" CACHE FILEPATH "path to the local des lib"  
FORCE)
   endif()
   include_directories ("${PROJECT_SOURCE_DIR}/libdes")
   link_directories (${PROJECT_SOURCE_DIR}/libdes)
   set (EXTRA_LIBS ${EXTRA_LIBS} ${DES_LIBRARY})
else (USE_LIBDES)
   find_library(CRYPTO_LIBRARY crypto)
   set (EXTRA_LIBS ${EXTRA_LIBS} ${CRYPTO_LIBRARY})
   add_definitions(-D_USE_OPENSSL)
endif (USE_LIBDES)

add_subdirectory (snmp++/src)
if (USE_LIBDES)
   add_dependencies(snmp++ des)
endif (USE_LIBDES)
#--------------------------

Why is Win32 (MS) always a Problem?

//Regards
Claus