cpp,qt: Remove C++ and Qt bindings

* README: Update.
* configure.ac: Remove checks, variables and file generations related to
the C++/Qt bindings. Remove cpp and qt* from available_languages and
default_languages.
* lang/Makefile.am (DIST_SUBDIRS): Remove cpp and qt.
* lang/cpp, lang/qt: Remove.
* m4/ax_check_compile_flag.m4, m4/ax_cxx_compile_stdcxx.m4,
m4/ax_gcc_func_attribute.m4, m4/pkg.m4, m4/qt5.m4, m4/qt6.m4: Remove.
--

The C++ and Qt bindings have been moved to separate Git repositories:
gpgmepp and gpgmeqt.

GnuPG-bug-id: 7262

1 files changed, 0 insertions, 55 deletions

diff --git a/lang/cpp/src/interfaces/dataprovider.h b/lang/cpp/src/interfaces/dataprovider.h
deleted file mode 100644
index 22dc459b..00000000
--- a/lang/cpp/src/interfaces/dataprovider.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-  interface/dataprovider.h - Interface for data sources
-  Copyright (C) 2003 Klarälvdalens Datakonsult AB
-  2016 Bundesamt für Sicherheit in der Informationstechnik
-  Software engineering by Intevation GmbH
-
-  This file is part of GPGME++.
-
-  GPGME++ is free software; you can redistribute it and/or
-  modify it under the terms of the GNU Library General Public
-  License as published by the Free Software Foundation; either
-  version 2 of the License, or (at your option) any later version.
-
-  GPGME++ is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU Library General Public License for more details.
-
-  You should have received a copy of the GNU Library General Public License
-  along with GPGME++; see the file COPYING.LIB.  If not, write to the
-  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-  Boston, MA 02110-1301, USA.
-*/
-
-#ifndef __GPGMEPP_INTERFACES_DATAPROVIDER_H__
-#define __GPGMEPP_INTERFACES_DATAPROVIDER_H__
-
-#include <sys/types.h>
-
-#include "../gpgmepp_export.h"
-
-#include <gpg-error.h>
-
-namespace GpgME
-{
-
-class GPGMEPP_EXPORT DataProvider
-{
-public:
-    virtual ~DataProvider() {}
-
-    enum Operation {
-        Read, Write, Seek, Release
-    };
-    virtual bool isSupported(Operation op) const = 0;
-
-    virtual ssize_t read(void   *buffer, size_t bufSize) = 0;
-    virtual ssize_t write(const void *buffer, size_t bufSize) = 0;
-    virtual off_t seek(off_t offset, int whence) = 0;
-    virtual void release() = 0;
-};
-
-} // namespace GpgME
-
-#endif // __GPGMEPP_INTERFACES_DATAPROVIDER_H__