转自：http://blog.csdn.net/zone_programming/article/details/51050726
遇到跟这篇博客一模一样的问题，但是搜索时并没有出现在首页，于是转载并重新起了个题目。
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
[cpp] view plain copy print ? >$ cd unpv13e >~unpv13e/$ ./configure >~unpv13e/$ cd lib >~unpv13e/lib/$ make >~unpv13e/lib/$ cd ../libfree >~unpv13e/libfree/$ make >$ 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:
[cpp] view plain copy print ? 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:60:9: error: argument ‘size’ doesn’t match prototype size_t size; ^ In file included from inet_ntop.c:27:0: /usr/include/arpa/inet.h:64:20: error: prototype declaration extern const char *inet_ntop (int __af, const void *__restrict __cp, ^ make: *** [inet_ntop.o] Error 1 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:60:9: error: argument ‘size’ doesn’t match prototype size_t size; ^ In file included from inet_ntop.c:27:0: /usr/include/arpa/inet.h:64:20: error: prototype declaration extern const char *inet_ntop (int __af, const void *__restrict __cp, ^ make: *** [inet_ntop.o] Error 1则需要:
[cpp] view plain copy print ? >~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:152:23: warning: ‘best.len’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (best.base == -1 || cur.len > best.len) ^ inet_ntop.c:123:28: 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 >~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:152:23: warning: ‘best.len’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (best.base == -1 || cur.len > best.len) ^ inet_ntop.c:123:28: 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
[cpp] view plain copy print ? >~unpv13e/libgai/$ cd .. >~unpv13e/$ sudo cp libunp.a /usr/lib >~unpv13e/libgai/$ cd .. >~unpv13e/$ sudo cp libunp.a /usr/lib
5. 修改unpv13e/lib/unp.h并复制
[cpp] view plain copy print ? >~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 >~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
[cpp] view plain copy print ? >~unpv13e/$ cd intro >~unpv13e/$ gcc daytimetcpcli.c -o cli -lunp >~unpv13e/$ cd intro >~unpv13e/$ gcc daytimetcpcli.c -o cli -lunp编译成功则大功告成。
