The qtmain Library | Qt 5.15

- Qt 5.15
- The qtmain Library
- Qt 5.15.2 Reference Documentation

# The qtmain Library

qtmain is a helper library that enables the developer to write a cross-platform main() function on Windows. If you do not use qmake, qbs, or other build tools such as CMake, then you need to link against the `qtmain` library.

The qtmain library is statically linked with the application. To avoid issues with static linking and the GNU Lesser General Public License (LGPL), it is licensed both under the commercial licenses, and the BSD 3-clause "New" or "Revised" License.

## License Information

     Copyright (C) 2016 The Qt Company Ltd.

     Commercial License Usage
     Licensees holding valid commercial Qt licenses may use this file in
     accordance with the commercial license agreement provided with the
     Software or, alternatively, in accordance with the terms contained in
     a written agreement between you and The Qt Company. For licensing terms
     and conditions see https://www.qt.io/terms-conditions. For further
     information use the contact form at https://www.qt.io/contact-us.

     BSD License Usage
     Alternatively, you may use this file under the terms of the BSD license
     as follows:

     "Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions are
     met:
       * Redistributions of source code must retain the above copyright
         notice, this list of conditions and the following disclaimer.
       * Redistributions in binary form must reproduce the above copyright
         notice, this list of conditions and the following disclaimer in
         the documentation and/or other materials provided with the
         distribution.
       * Neither the name of The Qt Company Ltd nor the names of its
         contributors may be used to endorse or promote products derived
         from this software without specific prior written permission.

     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."