* m4/qt.m4 (FIND_QT): Check if a qt application can be compiled and
linked.
--
In case gpgme is cross compiled pkg-config may pick up qt
for the build system and not for the host system. To avoid that
we check that we can compile a qt program for host.
* configure.ac: Configure test Makefile.
* m4/qt.m4: Look up Qt5Test flags.
* lang/qt/tests/t-keylist.cpp: New. Simple keylist check.
* lang/qt/tests/Makefile.am: New. General test framework.
--
This test mostly checks that it basically compiles / works and
adds a test framework.
* configure.ac: Add version defines. Check for qt if neccessary.
* lang/README: Mention qt
* lang/cpp/src/GpgmeppConfig.cmake.in.in: Remove comment. Find qgpgme.
* lang/qt/src/Makefile.am: New. Build qgpgme.
* lang/qt/README,
lang/qt/src/Makefile.am,
lang/qt/src/QGpgmeConfig.cmake.in.in,
lang/qt/src/QGpgmeConfigVersion.cmake.in,
lang/qt/src/dataprovider.cpp,
lang/qt/src/dataprovider.h,
lang/qt/src/qgpgme_export.h,
m4/qt.m4: New.
* lang/cpp/src/GpgmeppConfig.cmake.in.in,
lang/cpp/src/Makefile.am: Fix generated config file.
--
For now this is just the dataprovider which was part of the
KF5 Gpgmepp QGpgme variant. This is very thin but a useful
class which is used downstream.
