背景：
今天代码拉下了发现启动时报错，一看原来是同事用了zint的gem,我又没安，然后花了点时间解决，但其中踩了几次坑，所以打算记录下：
一、zint开源库的介绍
zint 是一个开源的条码编码库，它支持超过50种条码，包括 Code-128, Data Matrix, EAN-128, UPC/EAN, ITF, QR Code, Code 16k, PDF417, MicroPDF417, LOGMARS, Maxicode, GS1 DataBar, Aztec, Composite Symbols 等等，基本上你见过的条码都能用它来进行编码，它支持直接输出 PNG 格式的图像文件和位图的字节数组。
它的开源项目介绍页面，https://sourceforge.net/projects/zint/ 可自行阅读。
二、zint源码在linux平台下的编译和安装
编译平台介绍：
系统版本 ：Red Hat Enterprise Linux6
Linux内核版本：Linux localhost.localdomain 2.6.32-71.el6.i686 #1 SMP Wed Sep 1 01:26:34 EDT 2010 i686 i686 i386 GNU/Linux
gcc版本 ： 4.4.4 20100726 (Red Hat 4.4.4-13) (GCC)
zint版本：zint-2.4.3
Mac
如果您是mac的话只需执行命令即可 brew install zint
Linux
编译步骤：
1) 下载源码
在开源页面中下载到对应版本的zint源码；
https://sourceforge.net/projects/zint/files/zint/2.4.3/
笔者下载的版本是zint-2.4.3，对应的压缩包文件为 zint-2.4.3.tar.gz
将下载的源码放于一个新的linux的目录下，比如/zint_src
2) 解压源码
cd /zint_src
tar –xvf zint-2.4.3.tar.gz 解压到当前目录
解压完了之后，用ls看一下当前路径，如果有zint-2.4.3文件夹生成，且里面有文件，解压过程没有报错，则表示解压成功了。
3) 阅读编译指南
cd zint-2.4.3
vi readme-cmake
里面的内容如下：
how to :
mkdir build
cd build
cmake ..
make [-j nr_proc+1]
make install
4) 开始正式编译
mkdir build
cd build
cmake ..
执行后这句后，成功的话就会提示 Build files have been written to: /zint_src/zint-2.4.3/build
这个时候ls一下当前目录就会发现有makefile了，我们就可以使用make直接来安装了
make install
输入完后，会看到百分比提示了：
【笔者第一次make install报错了，是因为windows主机和linux虚拟机之间使用了共享文件，刚好做so文件软链接的时候就报错了，如下：】
[root@localhost build]# make install
Scanning dependencies of target zint
[ 1%] Building C object backend/CMakeFiles/zint.dir/common.c.o
[ 3%] Building C object backend/CMakeFiles/zint.dir/library.c.o
[ 5%] Building C object backend/CMakeFiles/zint.dir/render.c.o
.....[中间省略]
[ 55%] Building C object backend/CMakeFiles/zint.dir/code1.c.o
[ 57%] Building C object backend/CMakeFiles/zint.dir/gridmtx.c.o
Linking C shared library libzint.so
CMake Error: cmake_symlink_library: System Error: Operation not supported
CMake Error: cmake_symlink_library: System Error: Operation not supported
make[2]: *** [backend/libzint.so.2.4.1] 错误 1
make[1]: *** [backend/CMakeFiles/zint.dir/all] 错误 2
make: *** [all] 错误 2
[root@localhost build]#
如果按照一开始将源码放于/zint_src （非主机与虚拟机的共享目录），则可以很顺利的编译和安装，如下：
root@localhost build]# make install
Scanning dependencies of target zint
[ 1%] Building C object backend/CMakeFiles/zint.dir/common.c.o
[ 3%] Building C object backend/CMakeFiles/zint.dir/library.c.o
[ 5%] Building C object backend/CMakeFiles/zint.dir/render.c.o
[ 7%] Building C object backend/CMakeFiles/zint.dir/ps.c.o
[ 9%] Building C object backend/CMakeFiles/zint.dir/large.c.o
[ 11%] Building C object backend/CMakeFiles/zint.dir/reedsol.c.o
.....[中间省略]
[ 53%] Building C object backend/CMakeFiles/zint.dir/code49.c.o
[ 55%] Building C object backend/CMakeFiles/zint.dir/code1.c.o
[ 57%] Building C object backend/CMakeFiles/zint.dir/gridmtx.c.o
Linking C shared library libzint.so
[ 57%] Built target zint
Scanning dependencies of target zint_frontend
[ 59%] Building C object frontend/CMakeFiles/zint_frontend.dir/main.c.o
Linking C executable zint
[ 59%] Built target zint_frontend
Scanning dependencies of target QZint
[ 61%] Building CXX object backend_qt4/CMakeFiles/QZint.dir/qzint.cpp.o
Linking CXX shared library libQZint.so
[ 61%] Built target QZint
[ 63%] Generating qrc_resources.cxx
[ 65%] Generating moc_mainwindow.cxx
[ 67%] Generating moc_datawindow.cxx
[ 69%] Generating moc_sequencewindow.cxx
[ 71%] Generating moc_exportwindow.cxx
[ 73%] Generating ui_mainWindow.h
[ 75%] Generating ui_extData.h
[ 76%] Generating ui_extSequence.h
[ 78%] Generating ui_extExport.h
Scanning dependencies of target zint-qt
[ 80%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/barcodeitem.cpp.o
[ 82%] Building CXX object frontend_qt4/CMakeFiles/zint-qt.dir/main.cpp.o
[ 84%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/mainwindow.cpp.o
[ 86%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/datawindow.cpp.o
[ 88%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/sequencewindow.cpp.o
[ 90%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/exportwindow.cpp.o
[ 92%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/moc_mainwindow.cxx.o
[ 94%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/moc_datawindow.cxx.o
[ 96%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/moc_sequencewindow.cxx.o
[ 98%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/moc_exportwindow.cxx.o
[100%] Building CXX object
frontend_qt4/CMakeFiles/zint-qt.dir/qrc_resources.cxx.o
Linking CXX executable zint-qt
[100%] Built target zint-qt
Install the project...
-- Install configuration: "RelWithDebInfo"
-- Installing: /usr/share/cmake/Modules/FindZint.cmake
-- Installing: /usr/local/lib/libzint.so.2.4.1
-- Installing: /usr/local/lib/libzint.so.2.4
-- Installing: /usr/local/lib/libzint.so
-- Installing: /usr/local/include/zint.h
-- Installing: /usr/local/bin/zint
-- Installing: /usr/local/lib/libQZint.so.2.4.1
-- Installing: /usr/local/lib/libQZint.so.2.4
-- Installing: /usr/local/lib/libQZint.so
-- Installing: /usr/local/include/qzint.h
-- Installing: /usr/local/bin/zint-qt
到这里zint库就已经安装好了。
5) 测试zint和libzint
通过第4步后已经完成了安装，这个步骤我们来试一下zint和libzint如下：
先看下libzint是否安装成功，
[root@localhost build]# ls -al /usr/local/lib/libzint.so
lrwxrwxrwx. 1 root root 14 10月 16 17:20 /usr/local/lib/libzint.so ->
libzint.so.2.4
则正是zint动态库已经链接完成。
测试zint 如下：
在终端输入 zint –h
[liluchang@localhost src]$ zint -h
Zint version 2.4.1
Encode input data in a barcode and save as a PNG, EPS or SVG file.
-h, --help Display this message.
-t, --types Display table of barcode types
-i, --input=FILE Read data from FILE.
-o, --output=FILE Write image to FILE. (default is out.png)
-d, --data=DATA Barcode content.
-b, --barcode=NUMBER Number of barcode type (default is 20 (=Code128)).
--height=NUMBER Height of symbol in multiples of x-dimension.
-w, --whitesp=NUMBER Width of whitespace in multiples of x-dimension.
--border=NUMBER Width of border in multiples of x-dimension.
--box Add a box.
--bind Add boundary bars.
-r, --reverse Reverse colours (white on black).
--fg=COLOUR Specify a foreground colour.
--bg=COLOUR Specify a background colour.
--scale=NUMBER Adjust size of output image.
--directpng Send PNG output to stdout
--directeps Send EPS output to stdout
--directsvg Send SVG output to stdout
--dump Dump binary data to stdout
--rotate=NUMBER Rotate symbol (PNG output only).
--cols=NUMBER (PDF417) Number of columns.
--vers=NUMBER (QR Code) Version
--secure=NUMBER (PDF417 and QR Code) Error correction level.
--primary=STRING (Maxicode and Composite) Structured primary message.
--mode=NUMBER (Maxicode and Composite) Set encoding mode.
--gs1 Treat input as GS1 data
--binary Treat input as Binary data
--notext Remove human readable text
--square Force Data Matrix symbols to be square
--init Create reader initialisation symbol (Code 128)
--smalltext Use half-size text in PNG images
--batch Treat each line of input as a separate data set
error: No data received, no symbol generated
能看到版本信息，证明zint这个bin文件已经安装好了。
至此zint和libzint的安装已全部结束，笔者在安装的过程中，几乎使用的默认路径，感兴趣的童鞋可以试着修改一些自定义的安装路径，可以定制化自己的zint和libzint。