The reason why QT4 compilation fails is that the QT4 compilation method is actually very simple.

The reason why QT4 compilation fails is that the QT4 compilation method is actually very simple-Linux general technology-Linux programming and kernel information. The following is a detailed description. The problem that N multi-QT compilation on the Internet is not enough. After countless times of compilation, it is concluded that most of the reasons why QT compilation fails are due to a mistake in configure.

I. QT configure, if the-prefix parameter is not included, the default installation path is/usr/local/Trolltech/Qt-X.X.X, so if your QT directory is under this directory, you cannot directly use configure without parameters.

2. If configure-prefix is used but the directory is not specified, assuming that the QT directory is/home/crob/QT/qt-4.4.2, then the default QT installation directory is "/home/crob/QT/qt-4.4.2/yes, note that there is a YES later, this is obviously wrong.

3. Therefore, we must use the third most perfect method.
./Configure-prefix/home/crob/QT/qt-4.4.2/

The following is the complete process of compiling QT in linux. The compiling environment is Ubuntu 8.04.

1. decompress the downloaded package
Tar zxvf qt-x11-opensource-src-4.4.2.tar.gz-C/home/crob/QT
After decompression, the QT directory is/home/crob/QT/qt-4.4.2.

Ii. Edit. bashrc
Vi ~ /. Bashrc

Append the following lines
QTDIR =/home/crob/QT/qt-4.4.2
PATH = $ QTDIR/bin: $ PATH
QMAKESPEC =/home/crob/QT/qt-4.4.2/mkspecs/linux-g ++
MANPATH = $ QTDIR/doc/man: $ MANPATH
LD_LIBRARY_PATH = $ QTDIR/lib: $ LD_LIBRARY_PATH
Export qtdir path qmakespec manpath LD_LIBRARY_PATH

Run the following command to make the environment variable take effect.
Source ~ /. Bashrc

Iii. Configuration
Execute the following command line
Cd $ QTDIR
./Configure-prefix/home/crob/QT/qt-4.4.2/
Enter yes and then press Enter.
... Wait... about several minutes

Iv. Compilation
Enter make in the command line and press Enter. The compilation duration is 1 to N hours depending on the configuration.