[CMake] Mac Bundle installation with libraries

[James Bigler]

I have a project that builds a group of mac bundles that depend on a library
I also compile.  I need to install the library within the bundle to get it
to be relocatable, but I have no way of doing this without creating a
circular dependency.

src/CMakeLists.txt:

add_subdirectory(mylib)
add_subdirectory(mysamples)

src/mylib/CMakeLists.txt:

add_library(mylib mylib.cpp mylib.h)
set_target_properties(mylib PROPERTIES VERSION "2.3.4" SOVERSION "1")
install(TARGETS mylib RUNTIME DESTINATION bin LIBRARY DESTINATION lib
ARCHIVE DESTINATION lib)

src/mysamples/CMakeLists.txt:

foreach(sample fun lessfun)
  add_executable(${sample} ${sample}.cpp MACOSX_BUNDLE)
  target_link_libraries(${sample} mylib)

  install(TARGETS ${sample} DESTINATION samples)
  # I really want to install mylib in the bundle, but I don't have access to
the library target anymore.
  install(TARGETS mylib DESTINATION samples/${sample}.app/Contents/MacOS)
endforeach()

I really want to install my library within the bundle, but I don't have
access to the library outside of the mylib subdirectory.  I can't create
install targets in the mylib install directory, because I don't have the
list of bundles to install it to until after I parse the mysamples directory
and it's too late.

I tried to use the LOCATION_${CMAKE_BUILD_CONFIG} variable, but because I'm
using the VERSION and SOVERSION properties on my library I only get one of
the symlinks and not all three (libmylib.dylib -> libmylib.2.3.4.dylib,
libmylib.1.dylib -> libmylib.2.3.4.dylib, and libmylib.2.3.4.dylib).

Is there some way I can get mylib to also install with my executable
bundles?

James
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