更换Qt QtEmbedded库的版本出现问题及解决（交叉编译OpenSSL)

近日将QtEmbedded库的版本由4.7.0更新到4.7.4.工具链并未改变，仍为

Target: arm-none-linux-gnueabi
Configured with: ......
Thread model: posix
gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72)

所有依赖的库根据需要重新下载最新版本编译。现将在此过程中出现的问题及解决方法列出，以供下次移植时参考。

1.browser程序重新编译,在开发板的命令行运行:
./browser -display "LinuxFB:/dev/fb1" -geometry 1920x1080 -qws www.baidu.com &

a.第1次错误
-----------------------------------------------------------------------------
./browser: error while loading shared libraries: libqtsingleapplication.so.1: cannot open shared object file: No such file or directory
-----------------------------------------------------------------------------

拷贝libqtsingleapplication.so.1库到/nand1/lib中消除了这个问题

b.第2次错误
-----------------------------------------------------------------------------
 QFontDatabase: Cannot find font directory /usr/local/arm/qte4.7.4/lib/fonts - is Qt installed correctly?
-----------------------------------------------------------------------------

在目录/nand1/allapp/browser下建立qt.conf文件，文件内容
-----------------------------------------------------------------------------
[Paths]
Prefix = /usr/qte-4.7.4
Translations = share/qtopia/translations
Plugins = lib/qtopia/plugins
Libraries = lib
#Headers = include/qtopia
-----------------------------------------------------------------------------

页在/usr/qte-4.7.4下只是建立到nand1相应目录的链接，
------------------------------------------------------------------------------
/usr/qte-4.7.4 # ls -l
lrwxrwxrwx    1 root     0              10 Jan  1  1970 etc -> /nand1/etc
lrwxrwxrwx    1 root     0              10 Jan  1  1970 lib -> /nand1/lib
lrwxrwxrwx    1 root     0              14 Jan  1  1970 libexec -> /nand1/libexec
lrwxrwxrwx    1 root     0              11 Jan  1  1970 sbin -> /nand1/sbin
lrwxrwxrwx    1 root     0              12 Jan  1  1970 share -> /nand1/share
lrwxrwxrwx    1 root     0              10 Jan  1  1970 ssl -> /nand1/ssl
lrwxrwxrwx    1 root     0              19 Jan  1  1970 translations -> /nand1/translations
lrwxrwxrwx    1 root     0              10 Jan  1  1970 var -> /nand1/var
------------------------------------------------------------------------------

c.第3次错误
------------------------------------------------------------------------------
/nand1/allapp/browser # LinuxFB: driver not found
------------------------------------------------------------------------------
在编译QtEmbedded时的配置参数是:

./configure -opensource -confirm-license -release \
-prefix /usr/local/arm/qte4.7.4 \
-webkit -qt-zlib \
-xplatform qws/linux-arm-gnueabi-g++ -embedded armv6 \
-qt-kbd-linuxinput -qt-mouse-linuxinput -plugin-gfx-linuxfb \
-nomake demos -nomake examples -nomake tools -nomake test -fast \
-L /usr/local/arm/lib -I /usr/local/arm/include

增加上-qt-gfx-linuxfb，去除-plugin-gfx-linuxfb

=================================================================================
./configure -opensource -confirm-license -release \
-prefix /usr/local/arm/qte4.7.4 \
-webkit -qt-zlib \
-xplatform qws/linux-arm-gnueabi-g++ -embedded armv6 \
-qt-kbd-linuxinput -qt-mouse-linuxinput -qt-gfx-linuxfb \
-nomake demos -nomake examples -nomake tools -nomake test -fast \
-L /usr/local/arm/lib -I /usr/local/arm/include
=================================================================================

对与LinuxFb相关的配置项

----------------------------------------------------------------------------------
-qt-gfx-<driver> … Enable a graphics <driver> in the QtGui library.
Possible values for <driver>: [ linuxfb transformed qvfb vnc multiscreen ]

-plugin-gfx-<driver> Enable graphics <driver> as a plugin to be
linked to at run time.
Possible values for <driver>: [  ahi directfb hybrid linuxfb powervr qvfb transformed vnc ]

-no-gfx-<driver> … Disable graphics <driver> entirely.
Possible values for <driver>: [ linuxfb transformed qvfb vnc multiscreen ]

-----------------------------------------------------------------------------------

再次编译QtEmbedded时的信息:

-----------------------------------------------------------------------------------

Building on:   qws/linux-x86-g++
Building for:  qws/linux-arm-gnueabi-g++
Architecture:  armv6
Host architecture: i386

Build .................. libs docs translations
Configuration ..........  cross_compile release shared dll embedded largefile stl precompile_header exceptions_off  minimal-config small-config medium-config large-config full-config qt3support accessibility embedded reduce_exports ipv6 clock-gettime clock-monotonic mremap getaddrinfo ipv6ifname getifaddrs inotify png freetype zlib nis multimedia audio-backend svg script scripttools declarative release
Debug .................. no
Qt 3 compatibility ..... yes
QtDBus module .......... no
QtConcurrent code ...... yes
QtGui module ........... yes
QtScript module ........ yes
QtScriptTools module ... yes
QtXmlPatterns module ... no
Phonon module .......... no
Multimedia module ...... auto
SVG module ............. yes
WebKit module .......... yes
JavaScriptCore JIT ..... To be decided by JavaScriptCore
Declarative module ..... yes
Declarative debugging ...yes
Support for S60 ........ no
Symbian DEF files ...... no
STL support ............ yes
PCH support ............ yes
MMX/3DNOW/SSE/SSE2/SSE3. no/no/no/no/no
SSSE3/SSE4.1/SSE4.2..... no/no/no
AVX..................... no
iWMMXt support ......... no
NEON support ........... no
IPv6 support ........... yes
IPv6 ifname support .... yes
getaddrinfo support .... yes
getifaddrs support ..... yes
Accessibility .......... yes
NIS support ............ yes
CUPS support ........... no
Iconv support .......... no
Glib support ........... no
GStreamer support ...... no
PulseAudio support ..... no
Large File support ..... yes
GIF support ............ plugin
TIFF support ........... plugin (qt)
JPEG support ........... plugin (qt)
PNG support ............ yes (qt)
MNG support ............ plugin (qt)
zlib support ........... yes
Session management ..... no
Embedded support ....... armv6
Freetype2 support ...... auto (yes)
Graphics (qt) .......... linuxfb multiscreen linuxfb
Graphics (plugin) ......
Decorations (qt) ....... styled windows default
Decorations (plugin) ...
Keyboard driver (qt) ... tty linuxinput
Keyboard driver (plugin) ..
Mouse driver (qt) ...... pc linuxtp linuxinput
Mouse driver (plugin) ..
OpenGL support ......... no
OpenVG support ......... no
SQLite support ......... plugin (qt)
OpenSSL support ........ no
Alsa support ........... no
ICD support ............ no

-----------------------------------------------------------------------------------

d.第4次错误
再次运行,这次不再报inuxFB: driver not found.上次的问题得到解决
但由于缺必需的libweboxj.so，需要编译weboxjlib工程，生成so文件

$qmake weboxjlib.pro -r -spec /usr/local/arm/qte4.7.4/mkspecs/qws/linux-arm-gnueabi-g++
$make
出现下面错误:
---------------------------------------------------------------------------------
bookmarksdrv.h:8:27: error: libxml/parser.h: No such file or directory
bookmarksdrv.h:9:26: error: libxml/xpath.h: No such file or directory
In file included from weboxjlib.cpp:14:
----------------------------------------------------------------------------------

从信息中可看出，需要交叉编译libxml2库
我编译的版本是libxml2-2.7.8.tar.gz，交叉编译支持很好，只要在configure时设置正确的--host就搞定了
交叉编译安装后，问题解决，当然要修改weboxjlib.pro文件中的INCLUDEPATH路径，添加安装的libxml2的头文件路径

e.第5次错误
---------------------------------------------------------------------------------
mycurl.cpp:4:24: error: curl/multi.h: No such file or directory
mycurl.cpp: In member function 'void DownloadThread::init_easy_curl(CURLM*, my_curl_quest*)':
mycurl.cpp:33: error: 'CURL' was not declared in this scope
---------------------------------------------------------------------------------
这次是Curl库未交叉编译过，
下载curl-7.22.0.tar.bz2源码包进行交叉编译并安装

f.第6次错误
---------------------------------------------------------------------------------
des3drv.cpp:3:25: error: openssl/des.h: No such file or directory
des3drv.cpp: In member function 'void Des3Drv::Des3Encrypt(const QString&, const QString&, QString&)':
des3drv.cpp:103: error: 'DES_key_schedule' was not declared in this scope
---------------------------------------------------------------------------------
是openssl库未交叉编译
下载openssl-1.0.0e.tar.gz源码包
openssl对交叉编译支持不好，需要confiugre后修改Makefile文件

---------------------------------------------------------------------------------
CC= arm-none-linux-gnueabi-gcc
CFLAG= -DOPENSSL_THREADS  -Wa,--noexecstack
DEPFLAG= -DOPENSSL_NO_GMP -DOPENSSL_NO_JPAKE -DOPENSSL_NO_MD2 -DOPENSSL_NO_RC5 -DOPENSSL_NO_RFC3779 -DOPENSSL_NO_STORE
PEX_LIBS=
EX_LIBS=
EXE_EXT=
ARFLAGS=
AR= arm-none-linux-gnueabi-ar $(ARFLAGS) r
RANLIB= arm-none-linux-gnueabi-ranlib
NM= arm-none-linux-gnueabi-nm
PERL= /usr/bin/perl
TAR= tar
TARFLAGS= --no-recursion
MAKEDEPPROG=makedepend
LIBDIR=lib

---------------------------------------------------------------------------------
上面红色的部分是修改过的，应根据交叉编译器来设置。后面的make、make install没有什么问题.

g.第7次错误
----------------------------------------------------------------------------------
/usr/local/arm/arm-2008q3/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.2/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lbcti_telechips
collect2: ld returned 1 exit status
make: *** [libweboxjlib.so.1.0.0] 错误
----------------------------------------------------------------------------------
这个库是百视通提供的第三方库，将其拷贝到当前目录下就可以了

h.第8次错误
现在browser程序终于可以运行了，但是在加载libweboxj库时会抛出错误,主要是libweboxj库本身依赖的库在板子上不存在.
使用strace工具会有以下信息:
----------------------------------------------------------------------------------
open("/usr/lib/fast-mult/half/libxml2.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/fast-mult/half", 0xbec470f0) = -1 ENOENT (No such file or directory)
open("/usr/lib/fast-mult/libxml2.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/fast-mult", 0xbec470f0) = -1 ENOENT (No such file or directory)
open("/usr/lib/half/libxml2.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/half", 0xbec470f0)     = -1 ENOENT (No such file or directory)
open("/usr/lib/libxml2.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib", {st_mode=S_IFDIR|0755, st_size=1024, ...}) = 0
munmap(0x45880000, 501536)              = 0
munmap(0x458fb000, 286544)              = 0
munmap(0x45941000, 349680)              = 0
stat64("/nand1/allapp/webox/libweboxjlib.so", {st_mode=S_IFREG|0755, st_size=471392, ...}) = 0
write(2, "terminate called after throwing "..., 48terminate called after throwing an instance of ') = 48
write(2, "JsHostMng::ExceptId", 19JsHostMng::ExceptId)     = 19
write(2, "'\n", 2'
)                      = 2
----------------------------------------------------------------------------------
从以上信息看出是libxml2库找不到，交叉编译libxml2库后下载到板子上即可。

i.第9个错误
现在程序可以运行起来了，但是发现在浏览网页时gif图片显示不出来
看来是qt的插件imageformats未编译安装到开发板
进入qte4.7.4的源码目录./qte-4.7.4/src/plugins/imageformats中，运行下面命令
qmake
make clean
make
make install
将安装目录./plugins/imageformats中的库文件拷贝到开发板中，并在qt.conf中设置正确的插件路径，我的qt.conf设置如下:
-----------------------------------------------------------------------------------
[Paths]
Prefix = /usr/qte-4.7.4
Translations = share/qtopia/translations
Plugins = lib/qtopia/plugins
Libraries = lib
#Headers = include/qtopia
------------------------------------------------------------------------------------

现在，程序应该可以正常地运行了。

总结整个的问题解决过程，qt的编译的配置比较关键，一定要配置成你希望的display模式,在我的开发板上配置的是LinuxFB,具体的配置项是-qt-gfx-linuxfb。如果要支持网页游览，一定要加上-webkit选项，imageformats插件的编译可以在后面单独进行。

其它的主要是一些依赖的库了，这和具体的应用相关。

http://blog.sina.com.cn/s/blog_8738908f0100ugsr.html