Qt development application debug and release settings

Generally speaking ,release Version of the executable program is smaller than debug The version is much smaller （ Several times or even tens of times the difference ）, Moreover, due to the stripping of many debugging information and symbols, the operation efficiency is relatively higher . But in use Qt Occasionally, we will encounter timely choices during development release Version generated Binary system The document is still a huge problem . So check the relevant settings carefully , Ensure that the last version released is release edition .

1、 Premise ： It's generating Qt library (./configure) Already configured as   + -debug-and-release

    If configured as ./configure -release, Can only generate release edition

A simple configuration description is attached as follows

-release ...........  Debugging off . There is no debug library , Your own projects can only be published , Can't debug （ There is no debugging Library ）, If you insist on compiling debug Version! , Will prompt that xxxxxd.dll

* -debug .............  Only debug libraries , No release Library , In other words, you can only debug your own projects in the future , If you insist on compiling debug Version! , Will prompt that xxxxx.dll

+ -debug-and-release .  After compilation, there are two kinds of libraries . It is best to compile two kinds of libraries

2、Qt Createor Set up

    stay creator Of Projects Tab , Build settings （Build Settings）, If there is a lack of Debug perhaps Release, Click on Add Select corresponding QtSDK Version can .

    stay Build Steps in qmake step , If it is Debug You need to add parameters ：CONFIG+=debug.

3、pro file （ Optional ）

Be careful ： If in Qt Creator Set the construction parameters ,pro The file does not have to be set repeatedly .

CONFIG+=debug_and_release

CONFIG(debug,debug|release)

{

unix:TARGET=$$join(TARGET,,,_debug)

win32:TARGET=$$join(TARGET,,d)

}

make or make debug -------debug edition

make release          -------release edition

make all                 ------- Both versions generate

Generate Makefile There is QT_NO_DEBUG Parameters

4、 shielding release All in version QDebug() Prompt information ：

If you want to output the command line without typing all qdebug Information , Can be in pro Add... To the file DEFINES+=QT_NO_DEBUG_OUTPUT