Configuring assimp Library in QT environment (MinGW compiler)

1. preparation

download Cmake
download QT
download Assimp library
Note here to download 5.1.0~5.1.6（ Don't download 5.2 Above version , Compilation will not pass ）, Here we use 5.1.6 demonstration

2. Compile to generate the corresponding compiler Assimp file

open cmake

take scource code Locate the downloaded assimp-5.1.x,
take build The directory is located in the same directory build32 or build64 in （build The folder does not exist , Just type in ）

notes ：64 Bit could not be constructed correctly

Click on Configure, eject

Click on Yes, choice MinGW Makefiles,Specify native compilers,Next

open QT The installation directory （ Follow your own directory ）
stay Tools In the directory C:/Qt/Tools/mingw810_32/bin/gcc.exe,C:/Qt/Tools/mingw810_32/bin/g++.exe To compile the 32 Bit environment .
stay C:/Qt/Tools/mingw810_64/bin/gcc.exe,C:/Qt/Tools/mingw810_64/bin/g++.exe To compile the 64 Bit environment

With 32 Position as an example ：

finish

Again Configure, Turn white

Click on Generate

3. add to MinGW environment variable ：

hold Qt Under the root directory of ./Tool/mingw810_32/bin The directory is also added to the environment variable

attribute -》 Advanced system setup -》 environment variable

Find... In the system variable Path, newly build , add to QT MinGW compiler

Successfully added can be added in cmd Use in mingw32-make Instructions , The following indicates success

4. Generate dll Link to the file

open cmd,cd To assimp-5.1.6\assimp-5.1.6\build32, Input mingw32-make

Compile to 100%, sign out

QT link Assimp library

（1）include

stay assimp-5.1.6\assimp-5.1.6\include Find assimp,

Copy to project file include Next

stay assimp-5.1.6\assimp-5.1.6\build32\include\assimp Find config.h

Copy the file to the project file include/assimp Next

(2) link

QT link

The library file includes the generated libassimp.dll.a（ take libassimp.dll.a The file is placed in the project file directory ）
The containing path is project include

dll File to add

stay assimp-5.1.6\assimp-5.1.6\build32\bin In the directory libassimp-5.dll

Copy the file , Copied to the build-RenderLite-Desktop_Qt_5_15_1_MinGW_32_bit-Release,build-RenderLite-Desktop_Qt_5_15_1_MinGW_32_bit-Debug Two files

test

#include <assimp/Importer.hpp>

int main(int argc, char *argv[])
{
    
    QApplication a(argc, argv);
    Assimp::Importer importer;
    ....
}

The successful running