[CMake] Setting RPATH lookup on macOS

[Michael Jackson]

On 9/11/19, 5:42 PM, "Kyle Edwards" <kyle.edwards at kitware.com> wrote:

    On Wed, 2019-09-11 at 17:33 -0400, Michael Jackson wrote:
    > Already looked on google and at the CMake documentation but
    > everything listed does not seem to work so here is the setup.
    > 
    > I am using MKL and I have a home grown FindMKL since there isn’t an
    > official one. Inside that is the typical find_library() calls which
    > will find the libraries just fine. One of those libraries is a
    > dynamic library (.dylib). Using otool -L on that library the
    > install_name is encoded as @rpath. 
    > 
    > Now I have my add_executable(foo…) and target_link_libraries (Foo
    > ${MKL_LIBRARIES} ).
    > 
    > Everything compiles and links fine. The issue is at runtime. The app
    > will not launch because libmkl_rt.dylib is not loaded because the
    > path to that library is not encoded into the executable.
    > 
    > 639:[mjackson at ferb:ifort-release]$ otool -l
    > Bin/EMsoftWorkbench.app/Contents/MacOS/EMsoftWorkbench | grep "path"
    >          name @rpath/libEbsdLib.dylib (offset 24)
    >          name @rpath/libmkl_rt.dylib (offset 24)
    >          name @rpath/QtOpenGL.framework/Versions/5/QtOpenGL (offset
    > 24)
    >          name @rpath/QtNetwork.framework/Versions/5/QtNetwork (offset
    > 24)
    >          name @rpath/QtConcurrent.framework/Versions/5/QtConcurrent
    > (offset 24)
    >          name @rpath/QtWidgets.framework/Versions/5/QtWidgets (offset
    > 24)
    >          name @rpath/QtGui.framework/Versions/5/QtGui (offset 24)
    >          name @rpath/QtCore.framework/Versions/5/QtCore (offset 24)
    >          path /Users/Shared/EMsoft_SDK-ifort/EbsdLib-0.1-Release/lib
    > (offset 12)
    >          path /Users/Shared/EMsoft_SDK-
    > ifort/Qt5.12.3/5.12.3/clang_64/lib (offset 12)
    > 
    > 
    > Oddly the Qt libraries and one of my own libraries do get their
    > rpaths encoded. I feel like I need to append to the RPATH that gets
    > encoded into the executable but I am not really figuring out how to
    > do that.
    > 
    > Help....
    
    Have you looked at the BUILD_RPATH and INSTALL_RPATH properties?
    
    https://cmake.org/cmake/help/latest/prop_tgt/BUILD_RPATH.html
    https://cmake.org/cmake/help/latest/prop_tgt/INSTALL_RPATH.html
    
    Kyle
    
<smacks forehead with hand...> Missed BUILD_RPATH property. Found every other one.... THanks

--
Mike Jackson