[CMake] Windows Visual Studio Install Configurations unexpected behaviour

[Dominic Walsh]

Hi

I am attempting to "make install" into configuration dependent directories. Linux works very straightforwardly but VS not so much.

After much searching my CMakeLists file includes:

INSTALL(TARGETS bob  
        RUNTIME DESTINATION ${INSTALL_LIB_PATH}/Debug  
        LIBRARY DESTINATION ${INSTALL_LIB_PATH}/Debug  
        ARCHIVE DESTINATION ${INSTALL_LIB_PATH}/Debug
        CONFIGURATIONS Debug)

INSTALL(TARGETS bob  
        RUNTIME DESTINATION ${INSTALL_LIB_PATH}/Release  
        LIBRARY DESTINATION ${INSTALL_LIB_PATH}/Release  
        ARCHIVE DESTINATION ${INSTALL_LIB_PATH}/Release
        CONFIGURATIONS Release)        

Which is doing a little more than expected e.g.

3>PostBuildEvent:
3>  -- Install configuration: "Debug"
3>  -- Installing: <snip>/pc/x64_vs100/bob/lib/Debug/bob.lib
3>  -- Installing: <snip>/pc/x64_vs100/bob/lib/Debug/bob.dll
3>  -- Up-to-date: <snip>/pc/x64_vs100/bob/lib/Release/bob.dll

This final line was not expected. Looking at the cmake_install.cmake I can see the appropriate section:

IF(NOT CMAKE_INSTALL_COMPONENT OR "${CMAKE_INSTALL_COMPONENT}" STREQUAL "Unspecified")
  IF("${CMAKE_INSTALL_CONFIG_NAME}" MATCHES "^([Dd][Ee][Bb][Uu][Gg])$")
    list(APPEND CMAKE_ABSOLUTE_DESTINATION_FILES
     "<snip>Libraries/pc/x64_vs100/bob/lib/Release/bob.dll")
    IF (CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION)
        message(WARNING "ABSOLUTE path INSTALL DESTINATION : ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
    ENDIF (CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION)
    IF (CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION)
        message(FATAL_ERROR "ABSOLUTE path INSTALL DESTINATION forbidden (by caller): ${CMAKE_ABSOLUTE_DESTINATION_FILES}")
    ENDIF (CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION)
FILE(INSTALL DESTINATION "<snip>Libraries/pc/x64_vs100/bob/lib/Release" TYPE SHARED_LIBRARY FILES "<snip>Libraries/src/bob/Debug/bob.dll")

Where the configuration "Debug" has an install into the "Release" area?

I am using version 2.8.8 but have also found the same with 2.8.12.

I can write a custom post-build command but would like to understand,

thanks

Dominic