Can't start the application without LD_LIBRARY_PATH about hotspot HOT 6 CLOSED

This is the problem:

QLibraryPrivate::loadPlugin failed on "/home/alex/local/qt/5.9.1/gcc_64/plugins/platforms/libqxcb.so" : "Cannot load library /home/alex/local/qt/5.9.1/gcc_64/plugins/platforms/libqxcb.so: (/usr/lib/x86_64-linux-gnu/libQt5DBus.so.5: version `Qt_5' not found (required by /home/alex/local/qt/5.9.1/gcc_64/plugins/platforms/../../lib/libQt5XcbQpa.so.5))"

Try this before running hotspot:
export LD_LIBRARY_PATH=/home/alex/local/qt/5.9.1/gcc_64/lib/:$LD_LIBRARY_PATH

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Thank you Kevin. Indeed, the library path did work. I don't get why other projects don't need it, though. I tried with another cmake-based one (neovim-qt) and it worked. I think for qmake based binaries the rpath is set to where the Qt libaries are, so you don't need it. GammaRay also has it set. Is that something that could be added to hotspot, or is intentional?

Thank you.

from hotspot.

We could fix that by adding something like this to the root CMakeLists.txt:

set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}")

from hotspot.

Sorry, nope, that would not fix your particular issue.

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Actually, CMake is instructed to actually store the RPATH of the linked libraries in the resulting binary. It does that here for me (CMake version 3.7.2):

% readelf -d  /home/kfunk/devel/install/master/bin/hotspot
 ...
 0x000000000000001d (RUNPATH)            Library runpath: [/home/kfunk/devel/install/master/lib/x86_64-linux-gnu:/home/kfunk/devel/install/kf5/lib/x86_64-linux-gnu:/home/kfunk/devel/build/qt5.8/qtbase/lib]
 ...

hotspot's CMakeLists.txt already has this, which should enforce this behavior:

if(NOT DEFINED CMAKE_INSTALL_RPATH_USE_LINK_PATH)
  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif()

Maybe your CMake version is broken...?

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I have little experience with CMake, so I can't tell much about the build files, but I can assure you that RPATH is not working for me. I'm get this in "plain" Ubuntu 16.04 and with KDE Neon (also based in that LTS). I don't think CMake will be broken in such a widely used distribution:

$ objdump -p ./gammaray/bin/gammaray |grep PATH                                                                                   
  RPATH                /home/alex/local/gammaray/lib:/home/alex/local/qt-5.2/lib
$ objdump -p ./hotspot/bin/hotspot |grep PATH                                                                                     
  RUNPATH              /home/alex/local/hotspot/lib/x86_64-linux-gnu:/home/alex/local/qt/5.9.1/gcc_64/lib

In your quote, see that RUNPATH is set as well, but not RPATH. :)

Setting LD_LIBRARY_PATH is fine, so not a big deal, maybe. I'll edit the title of the issue.

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