Comment # 2 on bug 1193191 from Sarah Kriesch

The hints with "Undefined reference" are in the whole build log. That is too
much for one comment.

Therefore, here is the start:
[   14s] [ 77%] Linking CXX shared library ssh2-api-1.1.qmod
[   14s] /usr/bin/cmake -E cmake_link_script CMakeFiles/ssh2.dir/link.txt
--verbose=1
[   14s] /usr/bin/c++ -fPIC -O2 -g -m64 -fmessage-length=0 -D_FORTIFY_SOURCE=2
-fstack-protector -funwind-tables -fasynchronous-unwind-tables -DNDEBUG
-std=c++11 -DBUILDING_DLL=1 -O2 -g -DNDEBUG -flto=auto -Wl,--as-needed
-Wl,--no-undefined -Wl,-z,now -shared -Wl,-soname,ssh2-api-1.1.qmod -o
ssh2-api-1.1.qmod CMakeFiles/ssh2.dir/src/SFTPClient.cpp.o
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o
CMakeFiles/ssh2.dir/src/SSH2Client.cpp.o
CMakeFiles/ssh2.dir/src/ssh2-module.cpp.o
CMakeFiles/ssh2.dir/QC_SFTPClient.cpp.o CMakeFiles/ssh2.dir/QC_SSH2Base.cpp.o
CMakeFiles/ssh2.dir/QC_SSH2Channel.cpp.o
CMakeFiles/ssh2.dir/QC_SSH2Client.cpp.o  -lssh2 
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(int, int) const':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:195:
undefined reference to `QoreSocket::asyncIoWait(int, bool, bool) const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(ExceptionSink*, char const*, char const*, char
const*, int, bool, AbstractDisconnectionHelper*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:182:
undefined reference to `ExceptionSink::raiseErrnoException(char const*, int,
char const*, ...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::doSessionErrUnlocked(ExceptionSink*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:147:
undefined reference to `ExceptionSink::raiseException(char const*, char const*,
...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(ExceptionSink*, char const*, char const*, char
const*, int, bool, AbstractDisconnectionHelper*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:175:
undefined reference to `ExceptionSink::raiseException(char const*, char const*,
...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Channel::check_open(ExceptionSink*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.h:58:
undefined reference to `ExceptionSink::raiseException(char const*, char const*,
...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Channel::requestPty(ExceptionSink*, QoreString const&, QoreString const&,
int, int, int, int, int)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.cpp:74:
undefined reference to `QoreString::getBuffer() const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.cpp:74:
undefined reference to `QoreString::strlen() const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.cpp:74:
undefined reference to `QoreString::strlen() const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.cpp:74:
undefined reference to `QoreString::getBuffer() const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Channel.cpp:74:
undefined reference to `QoreString::strlen() const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(int, int) const':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:195:
undefined reference to `QoreSocket::asyncIoWait(int, bool, bool) const'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(ExceptionSink*, char const*, char const*, char
const*, int, bool, AbstractDisconnectionHelper*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:182:
undefined reference to `ExceptionSink::raiseErrnoException(char const*, int,
char const*, ...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::doSessionErrUnlocked(ExceptionSink*)':
[   14s]
/home/abuild/rpmbuild/BUILD/module-ssh2-release-0.9.15/src/SSH2Client.h:147:
undefined reference to `ExceptionSink::raiseException(char const*, char const*,
...)'
[   14s]
/usr/lib64/gcc/s390x-suse-linux/11/../../../../s390x-suse-linux/bin/ld:
CMakeFiles/ssh2.dir/src/SSH2Channel.cpp.o: in function
`SSH2Client::waitSocketUnlocked(ExceptionSink*, char const*, char const*, char
const*, int, bool, AbstractDisconnectionHelper*)':