Qt4.6.3 porting to mini2440

Some time ago, I made an article on porting qt4.6.3 to mini2440, and I have also reproduced it. I found that many problems have been encountered according to the above, and now I have recorded some of them,
To avoid detours in the future.
First, refer to the mini2440 User Manual on the mini2440 CD.
(A) Good compiler, software packages in the arm-linux-gcc-4.4.3. The software package is arm-linux-gcc-4.4.3.tar.gz.
(2 ). Describearm-qte-4.6.3-20100802.tar.gz, unzip and enter the arm-qte-4.6.3
(1 ). Mini2440 has made a ready-made script build-all for the compilation of our QtE-4.6.3, so, directly./build-all
This process will take a long time. Depending on the machine configuration, there will be different compilation times.
During this period, I encountered a problem:

../Corelib/tools/qbytearray. cpp: 54: 18: Fatal error: zlib. H: No file or directory
Fatal error: zlib. H: No file or directory
This error occurs because the zlib package is not installed. After installation, the problem can be solved. Note that the installation command is: sudo apt-Get install zlib1g-dev, instead of sudo apt-Get install zlib

(2) After successful execution, run the mktarget script,
./Mktarget
Will be extracted from the compiled target file directory
The QtE-4.6.3 library file and executable binary example to be packaged as a target-qte-4.6.3.tgz.

(3). decompress the above package in the root directory of the Development Board and use the following command:
# Tar xvzf target-qte-4.6.3.tgz-C/
In this way,
The trolltech directory will be created under the/usr/local/directory,
It contains all the library files and executable programs required for running.
At the same time, I set up the bin directory under/usr/local/trolltech/QtEmbedded-4.6.3-arm/on the board (my bin directory didn't exist)
(2 ). Install touch screen verification tool
(1) Put the tslib-1.4.tar.gz in a directory, such as/OPT directory. Run the following command:
Tar zxvf tslib-1.4.tar.gz then
(2) Source autogen. Sh
Then
(3)./configure -- prefix =/usr/local/tslib -- Host = arm-linuxac_cv_func_malloc_0_nonnull = Yes

(4) After: Make
I encountered an error:
In file encoded ded from/usr/include/fcntl. h: 252: 0,
From/usr/include/sys/fcntl. h: 1,
From ts_calibrate.c: 20:
In function 'open ',
Inlined from 'main' at ts_calibrate.c: 227: 11:
/Usr/include/bits/fcntl2.h: 51: 24: Error: Call to '_ open_missing_mode' declared with attribute error: open with o_creat in second argument needs 3 arguments
In function 'open ',
Inlined from 'main' at ts_calibrate.c: 229: 11:
/Usr/include/bits/fcntl2.h: 51: 24: Error: Call to '_ open_missing_mode' declared with attribute error: open with o_creat in second argument needs 3 arguments
Make [2]: *** [ts_calibrate.o] Error 1
Make [2]: Leaving directory '/home/Ouyang/downloads/tslib/tests'
Make [1]: *** [All-recursive] Error 1
Make [1]: Leaving directory '/home/Ouyang/downloads/tslib'
Make: *** [all] Error 2
The solution is as follows because the compiler syntax check is strict:
In the source file./tests/ts_calibrate.c

// Source file
// If (calfile = getenv ("tslib_calibfile "))! = NULL ){
// Cal_fd = open (calfile, o_creat | o_rdwr );
//} Else {
// Cal_fd = open ("/etc/pointercal", o_creat | o_rdwr );
//}
// You need to change it to the following format:
If (calfile = getenv ("tslib_calibfile "))! = NULL ){
Cal_fd = open (calfile, o_creat | o_rdwr, 0777 );
} Else {
Cal_fd = open ("/etc/pointercal", o_creat | o_rdwr, 0777 );
}

Save and re-compile.
(5) make install
If the above steps are correct, we can see the library files we need under/usr/local/tslib, which will be used for porting.
(4 ). Port to mini2440:
(1) Create the following directory on the Board:
/Usr/local/tslib
Copy all the files compiled and installed on the PC to the Development Board/usr/local/tslib /.
(2 ). Run the following command: VI/etc/profile:

Export qtdir =/usr/local/trolltech/QtEmbedded-4.6.3-arm
Export qpedir =/usr/local/trolltech/QtEmbedded-4.6.3-arm
Export tslib_root =/usr/local/tslib
Export Path = $ qtdir/bin: $ path
Export tslib_consoledevice = none
Export tslib_fbdevice =/dev/fb0
Export tslib_tsdevice =/dev/input/event0
Export tslib_plugindir = $ tslib_root/lib/TS
Export tslib_conffile = $ tslib_root/etc/ts. conf
Export tslib_calibfile =/etc/pointercal
Export qws_mouse_proto = tslib:/dev/input/event0
Export qws_display = linuxfb:/dev/fb0
Export qws_size = 240x320
Export LD_LIBRARY_PATH = $ tslib_root/lib: $ qtdir/lib:/usr/local/lib: $ ld_library

(3) modify the/usr/local/tslib/etc/ts. conf file on mini2440: remove the # And space before # module_raw input in the second line, save and exit.
The configuration file is as follows:
Module_raw Input
Module pthres pmin = 1
Module variance Delta = 30
Module dejitter Delta = 100
Module linear
Then, perform touch screen correction:
CD/usr/local/tslib/bin
./Ts_calibrate (this step is described in detail in the mini2440 User Manual)

(4 ). First, compile the program on the PC, enter the program (q_c) directory, and then execute the following command: (q_c is the directory of the QT program written by myself)
// Usr/local/trolltech/QtEmbedded-4.6.3-arm/bin/qmake

(5 ). After execution, run the following command: whether file q_c is a binary file. If yes, it indicates that the compilation is successful and can be transplanted to the mini2440 Development Board.

Copy the compiled program q_c to the development board/usr/local/trolltech/QtEmbedded-4.6.3-arm/bin/directory.

Then run./q_c-qws-fonts wenquanyi through the terminal. At this time, I encountered the following problem:
./Q_c:/lib/libc. so.6: Version 'glibc _ 100' not found (required by/usr/local/trolltech/QtEmbedded-4.6.3-arm/lib/libqtgui. so.4)

Because I deleted all QTE-related files in the previous file system. Added all tslib files and the Lib folder generated after qt-everywhere-opensource-src-4.6.3 compilation and installation in/usr/local/trolltech/QtEmbedded-4.6.3-arm copied to the Development Board file system. Then the/etc/profile and configuration file are modified.
This problem occurs in the Lib folder, which is the library file of the arm-Linux-GCC compiler. I used the advanced arm-Linux-GCC version to compile QT. All new arm-Linux-GCC lib versions should also be transplanted under Lib.
The solution is as follows:
Update the Lib folder. Use the library of the new compilation tool instead.
At this time, the Chinese on my board cannot be normally displayed, so:
(6) environment variable settings when the font is displayed on mini2440:
First, make sure that the/usr/local/TR .. /Q .. /lib/fonts (this path depends on your actual situation) has the font_wenquanyi wenquanyi font. If it does not exist, click the next one on the Internet.
Then the path is based on your actual situation:
My path is/usr/local/TR ../Q ../lib/fonts. Add this path to/etc/profile.
Export qt_qws_fontdir =/usr/local/tr.../Q ../lib/Fonts
Then source/etc/profile
Now, OK

However, I have another problem:
In this Code:

Qstring mainwindow: stringtounicode (qstring Str)
12 {
13
14 // tr must be added to the string sent here, And qtextcodec: setcodecfortr (qtextcodec: codecforlocale () can be added to the main function ());
15
16 // STR = tr ("hello ");
17 const qchar * q;
18 qchar qtmp;
19 qstring str0, Strout;
20 int num;
21 // int Len = Str. local8bit (). Length ();
22 q = Str. Unicode ();
23 int Len = Str. Count (); // There is a problem
24
25 qdebug () <"lenthe = ";
26 qdebug () <Len;
27 For (INT I = 0; I <Len; I ++)
28 {qtmp = (qchar) * q ++;
29 num = qtmp. Unicode ();
30 qdebug () <num;
31 if (Num & lt; 255)
32 Strout + = "00"; // Add "00" before an English letter or number"
33 str0 = str0.setnum (Num, 16); // The hexadecimal number.
34 Strout + = str0;
35
36}
37
38 return Strout;
39}
This function converts qsting into Unicode codes that can be directly used by the GSM module.
When I call this function, the parameter I passed is "happy work !", Run int Len = Str. Count ();
The value I get is 5. If the value is 13 on mini2440, I don't know how to solve it ......
If any Daniel knows how to solve the problem, I hope to give some advice to the younger brother ..