link fails on opensuse

[pvanek]

the error:

Linking CXX executable sddm
/usr/bin/cmake -E cmake_link_script CMakeFiles/sddm.dir/link.txt --verbose=1                                                 
/usr/bin/c++       CMakeFiles/sddm.dir/src/Authenticator.cpp.o CMakeFiles/sddm.dir/src/Configuration.cpp.o CMakeFiles/sddm.dir/src/Cookie.cpp.o CMakeFiles/sddm.dir/src/DisplayManager.cpp.o CMakeFiles/sddm.dir/src/LockFile.cpp.o CMakeFiles/sddm.dir/src/Main.cpp.o CMakeFiles/sddm.dir/src/SessionManager.cpp.o CMakeFiles/sddm.dir/sddm_automoc.cpp.o  -o sddm -rdynamic -lpam -ldl -lX11 -lQtDeclarative -lQtScript -lQtSvg -lQtXmlPatterns -lQtGui -lQtXml -lQtSql -lQtNetwork -lQtCore 
/usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-suse-linux/bin/ld: CMakeFiles/sddm.dir/src/Cookie.cpp.o: undefined reference to symbol 'clock_gettime@@GLIBC_2.2.5'
/usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-suse-linux/bin/ld: note: 'clock_gettime@@GLIBC_2.2.5' is defined in DSO /lib64/librt.so.1 so try adding it to the linker command line
/lib64/librt.so.1: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make[2]: *** [sddm] Error 1

hotfix:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd88f03..ce5535d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,7 @@ if (USE_QT5)
   find_package(Qt5Core REQUIRED)

   add_executable(sddm ${SOURCES})
-  target_link_libraries(sddm ${PAM_LIBRARIES} ${X11_X11_LIB})
+  target_link_libraries(sddm ${PAM_LIBRARIES} ${X11_X11_LIB} rt)

   qt5_use_modules(sddm Widgets Quick)
 else()
@@ -38,5 +38,5 @@ else()
   include(${QT_USE_FILE})

   add_executable(sddm ${SOURCES})
-  target_link_libraries(sddm ${PAM_LIBRARIES} ${X11_X11_LIB} ${QT_LIBRARIES})
+  target_link_libraries(sddm ${PAM_LIBRARIES} ${X11_X11_LIB} ${QT_LIBRARIES} rt)
 endif(USE_QT5)

but maybe we don't need clock_gettime() at all... QDateTime::toTime_t(), QDateTime::toMSecSinceEpoch()?

[sddm]

Maybe, we should use something from new c++11 random functionalities? For example: http://en.cppreference.com/w/cpp/numeric/random/uniform_int_distribution

What do you think?

[sddm]

I have pushed a new version using c++11 random facilities. Please test.

[pvanek]

it works fine now. Thanks.