# CPack Debian: Package has no dependencies
**URL:** https://discourse.cmake.org/t/cpack-debian-package-has-no-dependencies/4506
**Category:** Code
**Created:** [November 19, 2021, 10:12am UTC](https://discourse.cmake.org/t/cpack-debian-package-has-no-dependencies/4506 "2021-11-19T10:12:04Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Leon0402](https://discourse.cmake.org/u/Leon0402)
#### Post date: [November 19, 2021, 10:12am UTC](https://discourse.cmake.org/t/cpack-debian-package-has-no-dependencies/4506/1 "2021-11-19T10:12:04Z")
Hi,
I want to generate a .deb package and have `dpkg` installed (on my arch linux system). My code looks something like that:
```cmake
set(CPACK_COMPONENTS_ALL Beans)
set(CPACK_COMPONENTS_GROUPING ALL_COMPONENTS_IN_ONE)
set(CPACK_DEB_COMPONENT_INSTALL ON)
set(CPACK_DEBIAN_PACKAGE_DEPENDS "")
set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
set(CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS ON)
```
I don’t understand two things here (which might be the cause of my problem):
1. Do I need the `COMPONENT` variables like `CPACK_DEBIAN__PACKAGE_SHLIBDEPS`? I do use components, but don’t generate different packages.
2. What is the difference between `CPACK_DEBIAN_PACKAGE_SHLIBDEPS` and `CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS`. I’ve read the documentation, but I don’t really understand the difference
My actual problem though is that with the current configuration no dependencies are generated. Cmake tells me `CPACK_DEBIAN_PACKAGE_DEPENDS not set, the package will have no dependencies.`. But shouldn’t dependencies are determined automatically by using `dpkg-shlibdeps`.
There is also no dependency line in `Deb/Controll`. But at least something like `libstdc` should always be found I assumed?
What did I do wrong?
---
### Author:  [@Leon0402](https://discourse.cmake.org/u/Leon0402)
#### Post date: [November 19, 2021, 1:47pm UTC](https://discourse.cmake.org/t/cpack-debian-package-has-no-dependencies/4506/2 "2021-11-19T13:47:23Z")
Found out that I can run with debug output:
```auto
CPack: Create package using DEB
CPack: Install projects
CPack: - Install project: BeansServer []
CPack: - Install component: Beans
CPack: Create package
CPackDeb Debug: dpkg-shlibdeps --version output is 'Debian dpkg-shlibdeps version 1.20.9.
This is free software; see the GNU General Public License version 2 or
later for copying conditions. There is NO warranty.'
CPackDeb Debug: dpkg-shlibdeps version is <1.20.9>
CPackDeb: - Generating dependency list
CPackDeb Debug: dpkg-shlibdeps warnings
dpkg-shlibdeps: warning: package could avoid a useless dependency if ./opt/BeansServer/bin/BeansServer was not linked against libboost_date_time.so.1.76.0 (it uses none of the library's symbols)
dpkg-shlibdeps: warning: package could avoid a useless dependency if ./opt/BeansServer/bin/BeansServer was not linked against libboost_system.so.1.76.0 (it uses none of the library's symbols)
CPackDeb Debug: Found dependency: from output
-- CPACK_DEBIAN_PACKAGE_DEPENDS not set, the package will have no dependencies
```
Also there is a `shlibs` file now. But there is still no `depends` line in the control file. And I think there should be one, right?
---
### Author:  [@Leon0402](https://discourse.cmake.org/u/Leon0402)
#### Post date: [November 23, 2021, 8:43pm UTC](https://discourse.cmake.org/t/cpack-debian-package-has-no-dependencies/4506/3 "2021-11-23T20:43:39Z")
Okay it seems it just doesn’t work very well on arch, but only on debian based distro.
There is one problem left though. I want to ship Qt6 as part of the package as the library isn’t available in the package manager. On my Debian I therefore have installed Qt6 somewhere in my home directory and included it with CMAKE\_PREFIX\_PATH. Apart from Qt6.so libraries it contains also all dependencies in the same directory.
To copy the dependencies I do the following with the hint to the Qt6 library
```auto
install(TARGETS BeansServer COMPONENT Beans
RUNTIME_DEPENDENCIES
DIRECTORIES $
)
```
This will install everything properly. It issues a warning though, but as Qt6 is in a local directory, this seems to be right?
I also set the RPATH accordingly so all dependencies are found.
But when generating the deb I get errors like these:
```auto
CPackDeb: dpkg-shlibdeps: 'dpkg-shlibdeps: error: cannot find library
libicudata.so.56 needed by
./home/leon/beans-server/build-ninja-clang-release/install/lib/libicuuc.so.56.1
(ELF format: 'elf64-x86-64' abi: '0201003e00000000'; RPATH:
'/home/qt/icu_install/lib')
```
So first of all all the libraries: Qt6Core.so, libicuuc.so.56.1, libicudata.so.56 are from QT and are installed probably through the command above.
But it seems when analyzing `libicuuc.so.56.1` it searches in the RPATH of this library. The RPATH is wrong though, the above directory `/home/qt/icu_install/lib` doesn’t even exist.
Instead it should search in my defined RPATH (for BeansServer), where it would find the library.
What can I do about it?