libjpeg的交叉编译

从http://www.ijg.org/files/网站下载lib库的源文件.
开工:

tar -xzvf jpeg-6b.tar.gz
cd jpeg-6b
mkdir /opt/jpeg/jpeg-6b-release
./configure CC=mipsel-linux-gcc --prefix=/opt/jpeg/jpeg-6b-release --enable-shared --enable-static --host=mipsel-linux
mkdir /opt/jpeg/jpeg-6b-release/bin
mkdir /opt/jpeg/jpeg-6b-release/include
mkdir /opt/jpeg/jpeg-6b-release/lib
mkdir /opt/jpeg/jpeg-6b-release/man
mkdir /opt/jpeg/jpeg-6b-release/man/man1
make


=================================================
出错:

[root@localhost jpeg-6b]# make
./libtool --mode=compile mipsel-linux-gcc -O2  -I. -c ./jcapimin.c
make: ./libtool: Command not found
make: *** [jcapimin.lo] Error 127

所以,我们得先安装 libtool工具。
=================================================

 

从http://download.chinaunix.net/download/0007000/6039.shtml下载
得到: libtool-2.4.2.tar.xz
放到我们的Linux系统中:

网上说,tar.xz文件解压 有2中办法:
方式1:
    tar xvfJ ***.tar.xz
方式2:
    xz -d ***.tar.xz
    tar -xvf  ***.tar
我用方法1尝试,报错:

[root@localhost jpeg]# tar xvfJ libtool-2.4.2.tar.xz
tar: invalid option -- J
Try `tar --help' or `tar --usage' for more information.
[root@localhost jpeg]# tar xvfj libtool-2.4.2.tar.xz
bzip2: (stdin) is not a bzip2 file.
tar: Child returned status 2
tar: Error exit delayed from previous errors

于是,我采用方法2:
[root@localhost jpeg]# xz -d libtool-2.4.2.tar.xz
bash: xz: command not found
好吧, 我去给你安装个xz工具,从 http://tukaani.org/xz/xz-4.999.9beta.tar.bz2
上面下载得到 xz-4.999.9beta.tar.bz2。
  1、tar -jxvf xz-4.999.9beta.tar.bz2
  2、cd xz-4.999.9beta
  3、./configure --prefix=/
  4、make && make install
OK, 去之前的目录,然后 xz -d libtool-2.4.2.tar.xz
得到: libtool-2.4.2.tar
然后:tar -xvf libtool-2.4.2.tar
得到: libtool-2.4.2 文件夹。
$ cd libtool-2.2.4/ 

[root@localhost libtool-2.4.2]# ./configure CC=mipsel-linux-gcc --host=mipsel-linux --build=mipsel-linux --prefix=/opt/jpeg/libtool-release 
## ------------------------- ##
## Configuring libtool 2.4.2 ##
## ------------------------- ##

checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking build system type... mipsel-unknown-linux-gnu
checking host system type... mipsel-unknown-linux-gnu
configure: autobuild project... GNU Libtool
configure: autobuild revision... 2.4.2 ()
configure: autobuild hostname... localhost.localdomain
configure: autobuild mode... default
configure: autobuild timestamp... 20121116T063533Z
checking for mipsel-linux-gcc... mipsel-linux-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... configure: error: in `/opt/jpeg/libtool-2.4.2':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details

后来改为: 
[root@localhost libtool-2.4.2]# ./configure CC=mipsel-linux-gcc --host=mipsel-linux --prefix=/opt/jpeg/libtool-release 
配置通过。

 

$ make && make install  
[root@localhost libtool-2.4.2]# ls ../libtool-release/bin
libtool  libtoolize
[root@localhost libtool-2.4.2]# cp ../libtool-release/bin/* ../jpeg-6b/
[root@localhost libtool-2.4.2]# cd ../jpeg-6b
./configure CC=mipsel-linux-gcc --prefix=/opt/jpeg/jpeg-6b-release --enable-shared --enable-static --host=mipsel-linux
make && mak install

 

至此,得到我们的文件在 jpeg-6b-release 目录下面。

 

下面我们再延伸一下,将8d版本的库也编译了吧。

[root@localhost jpeg]# cp /mnt/hgfs/jpeg_lib/jpegsrc.v8d.tar.gz ./
[root@localhost jpeg]# tar zxvf jpegsrc.v8d.tar.gz 
[root@localhost jpeg-8d]# ./configure CC=mipsel-linux-gcc --prefix=/opt/jpeg/jpeg-8d-release --enable-shared --enable-static --host=mipsel-linux
[root@localhost jpeg-8d]# make && make install
[root@localhost jpeg-8d]# cd ../jpeg-8d-release/
[root@localhost jpeg-8d-release]# tree
.
|-- bin
|   |-- cjpeg
|   |-- djpeg
|   |-- jpegtran
|   |-- rdjpgcom
|   `-- wrjpgcom
|-- include
|   |-- jconfig.h
|   |-- jerror.h
|   |-- jmorecfg.h
|   `-- jpeglib.h
|-- lib
|   |-- libjpeg.a
|   |-- libjpeg.la
|   |-- libjpeg.so -> libjpeg.so.8.4.0
|   |-- libjpeg.so.8 -> libjpeg.so.8.4.0
|   `-- libjpeg.so.8.4.0
|-- man
|   `-- man1
|       |-- cjpeg.1
|       |-- djpeg.1
|       |-- jpegtran.1
|       |-- rdjpgcom.1
|       `-- wrjpgcom.1
`-- share
    `-- man
        `-- man1
            |-- cjpeg.1
            |-- djpeg.1
            |-- jpegtran.1
            |-- rdjpgcom.1
            `-- wrjpgcom.1

8 directories, 24 files


 

至此, 我们的8d版本的JPEG库也编译通过了,哈哈。。

 

现在我们回过头来看看xz文件的压缩作用如何:
-rwxr-xr-x 1 root root 11929600 2012-11-16 01:11 libtool-2.4.2.tar
-rwxrwxrwx 1 root root 868760 2012-11-16 01:09 libtool-2.4.2.tar.xz
事实证明,xz在压缩文件方面还是相当优秀的的。。

经网上查阅资料,xz文件的压缩和解压步骤如下:
创建tar.xz文件:只要先 tar cvf xxx.tar xxx/ 这样创建xxx.tar文件先,然后使用 xz -z xxx.tar 来将 xxx.tar压缩成为 xxx.tar.xz
解压tar.xz文件:先 xz -d xxx.tar.xz 将 xxx.tar.xz解压成 xxx.tar 然后,再用 tar xvf xxx.tar来解包。

 


 

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