Undefined references to sdbus (SDBusCpp)

[evan-erasmus]

Building on Ubuntu 24.10
cmake version 3.30.3

Found an issue with SDBus not being referenced in the CMakeLists.txt

/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `handleDbusLogin(sdbus::Message)':
Hypridle.cpp:(.text+0x335d): undefined reference to `sdbus::Message::getMemberName() const'
/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `handleDbusBlockInhibitsPropertyChanged(sdbus::Message)':
Hypridle.cpp:(.text+0x44f7): undefined reference to `sdbus::Message::enterContainer(char const*)'
/usr/bin/ld: Hypridle.cpp:(.text+0x4555): undefined reference to `sdbus::Message::enterDictEntry(char const*)'
/usr/bin/ld: Hypridle.cpp:(.text+0x4a5a): undefined reference to `sdbus::Message::enterVariant(char const*)'
/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `CHypridle::setupDBUS()':
Hypridle.cpp:(.text+0x4f17): undefined reference to `sdbus::createProxy(sdbus::IConnection&, sdbus::BusName, sdbus::ObjectPath)'
/usr/bin/ld: Hypridle.cpp:(.text+0x5550): undefined reference to `sdbus::createSessionBusConnection(sdbus::BusName const&)'
/usr/bin/ld: Hypridle.cpp:(.text+0x5665): undefined reference to `sdbus::createObject(sdbus::IConnection&, sdbus::ObjectPath)'
/usr/bin/ld: Hypridle.cpp:(.text+0x5e79): undefined reference to `sdbus::Message::operator<<(std::basic_string_view<char, std::char_traits<char> >)'
/usr/bin/ld: Hypridle.cpp:(.text+0x5e91): undefined reference to `sdbus::Message::operator<<(std::basic_string_view<char, std::char_traits<char> >)'
/usr/bin/ld: Hypridle.cpp:(.text+0x5f20): undefined reference to `sdbus::Message::enterVariant(char const*)'
/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `handleDbusSleep(sdbus::Message)':
Hypridle.cpp:(.text+0x76cb): undefined reference to `sdbus::Message::getMemberName() const'
/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `std::_Function_handler<void (sdbus::MethodCall), sdbus::MethodVTableItem::implementedAs<CHypridle::setupDBUS()::{lambda(unsigned int)#1}>(CHypridle::setupDBUS()::{lambda(unsigned int)#1}&&)::{lambda(sdbus::MethodCall)#1}>::_M_invoke(std::_Any_data const&, sdbus::MethodCall&&)':
Hypridle.cpp:(.text+0x8555): undefined reference to `sdbus::Message::getSender() const'
/usr/bin/ld: CMakeFiles/hypridle.dir/src/core/Hypridle.cpp.o: in function `std::_Function_handler<void (sdbus::MethodCall), sdbus::MethodVTableItem::implementedAs<CHypridle::setupDBUS()::{lambda(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)#1}>(CHypridle::setupDBUS()::{lambda(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)#1}&&)::{lambda(sdbus::MethodCall)#1}>::_M_invoke(std::_Any_data const&, sdbus::MethodCall&&)':
Hypridle.cpp:(.text+0x87c6): undefined reference to `sdbus::Message::getSender() const'
collect2: error: ld returned 1 exit status
gmake[3]: *** [CMakeFiles/hypridle.dir/build.make:150: hypridle] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:83: CMakeFiles/hypridle.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:90: CMakeFiles/hypridle.dir/rule] Error 2
gmake: *** [Makefile:170: hypridle] Error 2

After hours of agonizing pain, I added the following and it works flawlessly:

find_package(sdbus-c++ REQUIRED) # -> line 34
# ...
target_link_libraries(hypridle PRIVATE rt Threads::Threads PkgConfig::deps SDBusCpp::sdbus-c++) # -> line 49

Thought I'd drop it here for anyone that needs help with this in the future :)

[vaxerski]

it should already be linked, though... thats odd

[evan-erasmus]

No idea, I'm a php dev, not C++ XD

But the same issue exists for https://github.com/hyprwm/hyprlock

As I said I'm also compiling on Ubuntu so even sdbus-c++ had to be compiled from source - thinking that might be the reason (maybe part of it?)

sdbus I used: https://github.com/Kistler-Group/sdbus-cpp

[vaxerski]

make sure to checkout to v2.0.0

[zjeffer]

I fixed it by configuring sdbus-cpp to install in /usr/, instead of in /usr/local/:
So the sdbus-cpp building instructions become:

$ mkdir build
$ cd build
$ cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX:PATH=/usr ${OTHER_CONFIG_FLAGS}
$ cmake --build .
$ sudo cmake --build . --target install