Compilation and Installation

Procedure

Use PuTTY to log in to the server as the root user.
Download the dependency package.
```
yum install hdf5 hdf5-devel qt qt-devel
```

Download the installation package.

git clone --recursive https://github.com/Vaa3D/v3d_external.git

Configure the environment.
1. Open the ./build.linux file.
```
cd v3d_external
vim ./build.linux
```
2. Press i to go to the insert mode, and add the following content to the beginning of the file:
```
QT_DIR=/usr/lib64/qt4
PATH=$QT_DIR/bin:$PATH
QMAKESPEC=$QT_DIR/bin
```
3. Press Esc, type :wq!, and press Enter to save the file and exit.

Modify the configuration file.

Open v3d_main/build.redhat.
```
vim v3d_main/build.redhat
```

Press i to enter the insert mode and add --build=aarch64-unknown-linux-gnu to the end of the ./configure file.

36   ../src_packages/tiff-4.0.2/configure --prefix=$tifpath --build=aarch64-unknown-linux-gnu
...
61   ../src_packages/fftw-3.1.2/configure --prefix=$fftwpath --enable-float --enable-threads --enable-shared --build=aarch64-unknown-linux-gnu

Press Esc, type :wq!, and press Enter to save the file and exit.
Open v3d_main/v3d/v3d_essential.pro.
```
vim v3d_main/v3d/v3d_essential.pro
```

Press i to enter the insert mode and add -lpng to line 448.

448   LIBS += -L../common_lib/lib_unix64 -lpng -lteem  -lbz2 -lz  -lGLU #for nrrd support

Press Esc, type :wq!, and press Enter to save the file and exit.

Configure szip and teem.

cd v3d_main/common_lib/lib_unix64/
mkdir bak
mv *.a bak/
ln -s /path/to/szip/lib/libsz.a libszip.a
ln -s /path/to/teem/lib/libteem.a libteem.a

Perform the compilation.
```
cd /path/to/v3d_external
./build.linux
```

Parent topic: Vaa3D 2.2.0.0 Porting Guide (openEuler 20.03)