【unp】unix网络编程卷1-->环境搭建(ubuntu14.04)

学习unp网络编程，树上的例子均存在#include "unp.h"，故需要对环境进行配置。

1. 到资源页下载unpv13e

2. 解压并将unpv13e 移动到相应的文件夹下

3. 编译

 >$ cd unpv13e
 >~unpv13e/$ ./configure  

 >~unpv13e/$ cd lib
 >~unpv13e/lib/$ make  

 >~unpv13e/lib/$ cd ../libfree
 >~unpv13e/libfree/$ make  

如若出现以下问题:

 gcc -I../lib -g -O2 -D_REENTRANT -Wall   -c -o inet_ntop.o inet_ntop.c
 inet_ntop.c: In function ‘inet_ntop’:
 inet_ntop.c::: error: argument ‘size’ doesn’t match prototype
   size_t size;
          ^
 In file included from inet_ntop.c:::
 /usr/include/arpa/inet.h::: error: prototype declaration
  extern const char *inet_ntop (int __af, const void *__restrict __cp,
                     ^
 make: *** [inet_ntop.o] Error   

则需要:

 >~unpv13e/libfree/$ vim inet_ntop.c  //将第60行的 size_t size 改成 socklen_t size;
 >~unpv13e/libfree/$ make // 改变完后重新make
 >~unpv13e/libfree/$ cd ../libgai
 >~unpv13e/libgai/$ make   //以下只是warning, 乎略之
 /usr/include/arpa/inet.h: In function ‘inet_ntop’:
 inet_ntop.c::: warning: ‘best.len’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    if (best.base == - || cur.len > best.len)
                        ^
 inet_ntop.c::: note: ‘best.len’ was declared here
   struct { int base, len; } best, cur;
                             ^
 gcc -I../lib -g -O2 -D_REENTRANT -Wall   -c -o inet_pton.o inet_pton.c
 ar rv ../libunp.a in_cksum.o inet_ntop.o inet_pton.o
 a - in_cksum.o
 a - inet_ntop.o
 a - inet_pton.o
 ranlib ../libunp.a 

至此，编译成功生成静态库libunp.a

4. 将生成的libunp.a复制到/usr/lib下

 >~unpv13e/libgai/$ cd ..
 >~unpv13e/$ sudo cp libunp.a /usr/lib  

5. 修改unpv13e/lib/unp.h并复制

 >~unpv13e/$ vim lib/unp.h  // 将#include "../config.h" 改成 #include "config.h"
 >~unpv13e/$  sudo cp lib/unp.h /usr/include
 >~unpv13e/$ sudo cp config.h /usr/include  

6. 编译例子

 >~unpv13e/$  cd intro
 >~unpv13e/$  gcc daytimetcpcli.c -o cli -lunp  

编译成功则大功告成。