Version:            (using KDE 4.3.0)
Compiler:          Sun Studio 12 U1 
OS:                Solaris
Installed from:    Compiled From Sources

The code that is used to detect if Qt was built with SSL support (kdecore/network/ConfigureChecks.cmake) fails when the '-g' option is passed to the Sun Studio compiler. According to similar issue discussed at http://forums.sun.com/thread.jspa?threadID=5388956, some headers may be missing somewhere.

Without the flag:
$ /opt/sunstudio12.1/bin/CC  -library=no%Cstd -library=Crun    -I/opt/foss/include/stdcxx       -Qoption ccfe -features=gcc   -DHAVE_QSSLSOCKET -I/opt/foss/qt4/include   -o cxx.o -c src.cxx   
test2@opensolaris:~$ /opt/sunstudio12.1/bin/CC  -library=no%Cstd -library=Crun  -I/opt/foss/include/stdcxx   -Qoption ccfe -features=gcc     -DHAVE_QSSLSOCKET   cxx.o  -o cmTryCompileExec

************************************
With the flag:
$ /opt/sunstudio12.1/bin/CC  -library=no%Cstd -library=Crun    -I/opt/foss/include/stdcxx       -Qoption ccfe -features=gcc   -DHAVE_QSSLSOCKET -I/opt/foss/qt4/include   -o cxx.o -c src.cxx -g
$ /opt/sunstudio12.1/bin/CC  -library=no%Cstd -library=Crun  -I/opt/foss/include/stdcxx   -Qoption ccfe -features=gcc     -DHAVE_QSSLSOCKET   cxx.o  -o cmTryCompileExec   -g
Undefined			first referenced
 symbol  			    in file
QByteArray::shared_null      cxx.o
[Hint: static member QByteArray::shared_null must be defined in the program]

void qFree(void*)                   cxx.o
QSslCertificate::QSslCertificate(const QByteArray&,QSsl::EncodingFormat) cxx.o
q_atomic_decrement                  cxx.o
q_atomic_increment                  cxx.o
ld: fatal: symbol referencing errors. No output written to cmTryCompileExec

I had to add '-L/opt/foss/qt4/lib -lQtCore -lQtNetwork' to the CXXFLAGS to get past the check