* m4/qt5.m4: Export moc for Qt 5 in variable MOC5. Unset temporary MOC2.
* m4/qt6.m4: Export moc for Qt 6 in variable MOC6.
* lang/qt/src/Makefile.am: Generate .moc5 files from .h files. Generate
.moc forwarding headers in moc5 subfolder. Add moc5 subfolder to include
paths for Qt 5-based qgpgme library. Ditto for Qt 6. Clean up moc5 and
moc6 subfolders.
* lang/qt/tests/Makefile.am: List tests and test runners for Qt 5 and
Qt 6. Generate .moc5 files from .cpp files of tests. Generate .moc
forwarding headers in moc5 subfolder. Generate .hmoc file from
t-support.h directly in moc5 subfolder. Add moc5 subfolder to include
paths for all Qt 5-based tests and runners. Ditto for Qt 6. Specify
sources, LDADD and CPPFLAGS for all tests and test runners for Qt 5 and
Qt 6. Clean up moc5 and moc6 subfolders.
--
The output of Qt 5's moc and Qt 6's moc is incompatible. Therefore, we
need to generate different .moc files for Qt 5 and Qt 6 to support
co-building of the Qt 5 and Qt 6 bindings. The duplication of the
listing of the tests couldn't be avoided because automake doesn't
understand `the_tests5 = $(the_tests:%=%5)` and couldn't match the
tests with their _SOURCES. Maybe some m4 programming would have helped,
but that would have made the Makefiles even more unreadable.
GnuPG-bug-id: 7205
* configure.ac: Add option to enable building the Qt 6 binding with
-fPIC. Fix typo and mention default for --enable-no-direct-extern-access
option.
* m4/qt6.m4: Add -fPIC to GPGME_QT6_CFLAGS if requested or if Qt 6 was
built with reduce_relocations.
--
GnuPG-bug-id: 6781
* m4/qt6.m4: Check the build configuration of Qt 6 for
no_direct_extern_access.
--
If building with -mno-direct-extern-access has been neither enabled nor
disabled explicitly, then check whether Qt 6 was built with this flag.
The check is skipped, if we build for Windows.
GnuPG-bug-id: 6696
* configure.ac: Check if C++ compiler supports
-mno-direct-extern-access. Add option to enable building with
-mno-direct-extern-access.
* m4/ax_check_compile_flag.m4: New.
* m4/qt6.m4: Add -mno-direct-extern-access to GPGME_QT6_CFLAGS if
supported and requested.
--
This adds the possibility to build the Qt 6 bindings with the
-mno-direct-extern-access flag. This is required if Qt 6 was built with
this flag. This is a workaround for the lack of Qt 6's pkgconfig files
providing this flag if needed.
GnuPG-bug-id: 6696
* m4/qt6.m4: Remove attempt to build a Qt program with -fPIC.
--
libtool already takes care of adding -fPIC. Moreover, building without
-fPIC succeeded even if Qt was built with -fPIC, i.e. the check didn't
work as intended.
GnuPG-bug-id: 6696
* m4/qt5.m4, m4/qt6.m4: Perform build test only if moc was found.
--
If moc wasn't found but the build test (which doesn't require moc)
succeeded, then success was reported.
* m4/qt6.m4: Do not add -fpic to GPGME_QT6_CFLAGS. Add -fpic to CPPFLAGS
used for build test of simple Qt 6 application.
--
The pkgconfig files of Qt6Core do not contain the qt_config variable,
so that we cannot easily check whether Qt6 was compiled with pic. For
simplicity we always compile the test application with -fpic to avoid
a build failure if Qt6 was actually compiled with pic.
For the actual build of QGpgME libtool automatically uses -fPIC, so that
we don't have to add it to the GPGME_QT6_CFLAGS.
* configure.ac: Look for Qt 5 and/or Qt 6. Require C++17 if Qt 6 binding
is built. Build cmake files QGpgmeConfig* for Qt 5 and QGpgmeQt6Config*
for Qt 6.
(available_languages): Add "qt5" and "qt6".
(WANT_QT5, WANT_QT6): New conditionals.
* lang/qt/src/Makefile.am: Keep building libqgpgme for Qt 5. Build
libqgpgmeqt6 for Qt 6.
* lang/qt/tests/Makefile.am: Build tests for Qt 5 or Qt 6.
* lang/qt/src/QGpgmeQt6Config-w32.cmake.in.in,
lang/qt/src/QGpgmeQt6Config.cmake.in.in,
lang/qt/src/QGpgmeQt6ConfigVersion.cmake.in, m4/qt6.m4: New.
--
This makes it possible to build QGpgME optionally for Qt 6.4.0 or later.
By default or if the language "qt" is enabled, then QGpgME is built
either for Qt 5 (if found) or Qt 6. A build for Qt 5 or Qt 6 can be
requested by explicitly enabling the language "qt5" or "qt6". Building
QGpgME for Qt 5 and Qt 6 simultaneously is not supported.
