I'm running Slack64-current and also Alien Bob's latest kde5. I've tried building Digikam-5.20 that Willy Sudiarto Raharjo posted on his slackbuilds site and the build crashes at about 55% completion. I've found these two errors in the build log that I captured -

root@missi:/data/patches/digikam$ cat build.txt|grep Error
make[2]: *** [core/utilities/kdesupport/akonadi/CMakeFiles/akonadiiface_src.dir/akonadiiface.cpp.o] Error 1
make[1]: *** [core/utilities/kdesupport/akonadi/CMakeFiles/akonadiiface_src.dir/all] Error 2
make: *** [all] Error 2

Is this down to the version of KDE (and akonadi) I'm running? If so, any fixes? Thanks in advance

Tom

The actual error will have occurred earlier.
You could try my checkpkg script to get some more insight into the failure of this build.
If I would guess: the akonadi package may be causing this.
One of the akonadi header files contains a hardcoded compiler version. Check the file and make sure that the version number in matches the version of the compiler you are using. Slackware-current comes with gcc-5.4.0 by default but perhaps you are using gcc-6.2.0 from the /testing directory.

Ahh, you nailed it Alien Bob. Many thanks for your help.

sh checkpkg.sh -l build.txt
++ Checking logfile 'build.txt' (no news is good news):
7452 :Call Stack (most recent call first):
7490 :Call Stack (most recent call first):
7513 :Call Stack (most recent call first):
7554 :Call Stack (most recent call first):
7590 :-- Looking for pthread_create - not found
7592 :-- Looking for pthread_create in pthreads - not found
7750 :-- OpenMP not found
13995 :/usr/include/KF5/AkonadiCore/std_exception.h:1:44: fatal error: /usr/include/c++/5.3.0/exception: No such file or directory
13998 :make[2]: *** [core/utilities/kdesupport/akonadi/CMakeFiles/akonadiiface_src.dir/akonadiiface.cpp.o] Error 1
14001 :make[1]: *** [core/utilities/kdesupport/akonadi/CMakeFiles/akonadiiface_src.dir/all] Error 2
14577 :make: *** [all] Error 2

Changed the compiler version to 5.4 (slack64-current version) and it built fine and runs nicely. Thank you again.