On 12/09/2010 12:08 AM, luxInteg wrote:
> Greetings
>
> consider my small 'learn cmake/qt4 project'
> It generates a library testLIB-static in $CMAKE_SOURCE_DIR}/testLIB
> and an executible testBIN in ${CMAKE_SOURCE_DIR}/upstream/bin
>
>
> A) For the library I used
> add_library(testLIB-static testLIB.cpp )
>
>
> B) For the executible
> I use the sip generator to generate code like so
>
>
> add_custom_command(OUTPUT
> ${CMAKE_CURRENT_BINARY_DIR}/generatedfile1.cpp
> ----
> ---
> COMMAND ${SIP_EXECUTABLE}
> -c${CMAKE_CURRENT_BINARY_DIR}
> -I${SIP_PATH}
> -s ".cpp"
> -t WS_X11 -t Qt$version -w
>
> ${CMAKE_SOURCE_DIR}/path/to/generator.sip
> DEPENDS ${CMAKE_SOURCE_DIR}/path/to/generator.sip
> MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/path/to/generator.sip
> COMMENT "Processing ${CMAKE_SOURCE_DIR}/path/to/generator.sip"
> VERBATIM )
>
>
> add_execitible(testBIN
> testBIN.cpp
> generatedfile1.cpp )
>
> target_link_libraries(testLIB-static)
Again, doing some RTFM, you'll find that the signature of
TARGET_LINK_LIBRARIES is like this:
target_link_libraries(<target> [item1 [item2 [...]]]
[[debug|optimized|general] <item>] ...)
So, for your example, this means:
target_link_libraries(testBIN testLIB-static)
>
> ############### these are my findings
>
> ----If I add find_library(XXX testLIB-static) before I use the
> add_executible() command cmake contends that testLIB-static is set to
> NOTFOUND.
You don't do find_library on targets you create.
> ----If I do not use find_library(XXX testLIB-static) and run make, make
> goes to 100 per cent and then all hell breaks loose with linking problems.
Of course. As I explained above, you need to first pass the TARGET that
is to be linked against the library to TARGET_LINK_LIBRARIES. Otherwise
CMake thinks that you want to link the library target against nothing...
(that probably should be prevented by cmake.)
>
> If I change the second line of the add_custom_command() statement to use
> 'absolute paths that I can understand such as:-
>
> ${CMAKE_SOURCE_DIR}/upstream/bin/generatedfile1.cpp the SIP generator fails
> to generate generatedfile1.cpp
>
Well, then clearly the two are not equivalent. Are you doing in-source
builds? NEVER do that. Don't. Period. And if you do out-of-source
builds, then it is obvious that they are not the same (the former is in
the BUILD tree, whereas the latter is in the SOURCE tree). Really, read
http://www.cmake.org/Wiki/CMake_FAQ#Out-of-source_build_trees.
>
>
> Advice ould be appreciated.
>
> luxInteg
Michael
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Follow this link to subscribe/unsubscribe:
http://www.cmake.org/mailman/listinfo/cmake
