[CMake] Dependencies with static libraries

[Hendrik Sattler]

Are you sure you hit the right build menu item? Maybe you are just building the current target. At least that would explain it. In MSVC you must either build the solution or the ALL_BUILD target for this to work.


Am 28. Juni 2018 16:07:33 MESZ schrieb Stephan Menzel <stephan.menzel at gmail.com>:
>Hello CMake community,
>
>I am observing a strange problem regarding dependencies to static libs
>in
>executables. I am not entirely sure but it seems this started since I
>upgraded to the 3.11 line. I am using Windows and MSVC14.
>
>Basically, my code base contains a number of static libraries that are
>linked together to a few executables. Very basic and down to earth.
>Like
>this:
>
>set(MY_SERVER_SRC
>ServerSource1.cpp
>ServerSource2.cpp
>)
>
>set(MY_SERVER_HDR
>ServerConfig.hpp
>Header1.hpp
>Header2.hpp
>)
>
>add_library(my_server STATIC ${MY_SERVER_SRC} ${MY_SERVER_HDR})
>target_link_libraries(my_server
>some_tools
>some_base
>${Boost_LIBRARIES}
>${OPENSSL_LIBRARIES}
>)
>add_executable(serverd main.cpp)
>target_link_libraries(serverd
>my_server
>some_tools
>some_base
>
>${Boost_LIBRARIES}
>${OPENSSL_LIBRARIES}
>)
>
>So a few big libs with the beef in them and then a small main.cpp
>containing executable. Nothing fancy.
>
>What gives me trouble now is that dependencies within that seem broken.
>In
>above example, when I edit ServerSource1.cpp and then hit "Build", I
>see
>ServerSource1.o being compiled and the library my_server being linked.
>Like
>expected. Problem is, serverd does not get linked. Or at least I see no
>hint of it being linked (In MSVC's output window).
>So, my question is: What could cause this? I there anything 3.11.x does
>differently which causes those dependecies to break? And how can I fix
>this?
>
>This is quickly turning into a major problem for us here as it means
>that
>we cannot reliably build anymore because whenever we change something
>and
>hit build we can't be sure we get a linked executable anymore unless we
>do
>a complete rebuild, which takes a long time (In fact, I wrote this
>message
>waiting for one).
>
>Thanks for any hint!
>
>Stephan
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