C++程序中引入.a(静态库)文件

 因为有一些c程序用G++编译不过去，但是c++又比较的强大，于是有一个方法就是将c程序生成.a文件，通过静态库的方法引入c++中：

见程序RPC：

1,square.x

 

struct square_in{/* data */long arg1;};struct square_out{/* data */long res1;};program SQUARE_PROG{version SQUARE_VERS{square_out SQUAREPROC( square_in ) = 1;} = 1;} = 0x31230000; 

 

 

2,client.h

extern "C" int client_rpc( int, char const* [] ); 

 

3, client.c

#include <stdlib.h>#include <rpc/rpc.h>#include "square.h"#include <errno.h>#include <stdio.h>int client_rpc( int argc, char const* argv[] ){CLIENT *cl;square_in in;square_out *outp;/********timeout*************/struct timeval tv;if( argc != 4 ){perror("usage: ./client <hostname> <integer_value> <protocol>");}cl = clnt_create( argv[1], SQUARE_PROG, SQUARE_VERS, argv[3]);/********************************* * 加入UNIX认证 ********************************/auth_destroy( cl->cl_auth );cl->cl_auth = authsys_create_default();/********************************* * 加入TIMEOUT * man clnt_control可以看一下 ********************************/ if( clnt_control( cl, CLGET_TIMEOUT, ( char * )&tv ) == TRUE ){printf( "timeout:%ld sec, %ld usec/n", tv.tv_sec, tv.tv_usec );}if( clnt_control( cl, CLGET_RETRY_TIMEOUT, ( char * )&tv ) == TRUE ){printf( "retry timeout:%ld sec, %ld usec/n", tv.tv_sec, tv.tv_usec );}in.arg1 = atol( argv[2] );if( ( outp = squareproc_1( &in, cl ) ) == NULL ){printf("%s/n", clnt_sperror( cl, argv[1]) );}printf("result: %ld/n", outp -> res1 );return 0;} 

 

4, server.c

#include "square.h"square_out * squareproc_1( square_in *inp, struct svc_req *rqstp ){static square_out out;// if( rqstp->rq_cred.oa_flavor == 1 ){// //下面的为什么不可以// //rqstp->rq_cred.oa_flavor == AUTH_SYS// struct authsys_parms *au;// // printf("version number %ld/n", rqstp-> rq_vers);// au = ( struct authsys_parms * )rqstp->rq_clntcred;// //printf("AUTH_SYS: host %s, uid %d, gid %d/n", au->aup_machname, (long)au->aup_uid, (long)au->aup_gid);// printf("AUTH_SYS: host %s/n",au->aup_machname);// }sleep(1000);/********************注意下面是在AIX上可以运行的可以取到值，结构体用authunix_parms，上面的不可以参考资料见http://publib.boulder.ibm.com/infocenter/systems/index.jsp?topic=/com.ibm.aix.progcomm/doc/progcomc/rpc_unixauth_ex.htm*********************/if (rqstp->rq_cred.oa_flavor == AUTH_UNIX) {struct authunix_parms*au;au = (struct authunix_parms *)rqstp->rq_clntcred;printf("AUTH_SYS: host %s, uid %ld, gid %ld/n", au->aup_machname, (long) au->aup_uid, (long) au->aup_gid);}out.res1 = inp -> arg1 * inp -> arg1;return (&out);} 

 

6, test_c_plus_plus.cpp

#include <stdlib.h>#include <rpc/rpc.h>#include "square.h"#include <errno.h>#include <stdio.h>int client_rpc( int argc, char const* argv[] ){CLIENT *cl;square_in in;square_out *outp;/********timeout*************/struct timeval tv;if( argc != 4 ){perror("usage: ./client <hostname> <integer_value> <protocol>");}cl = clnt_create( argv[1], SQUARE_PROG, SQUARE_VERS, argv[3]);/********************************* * 加入UNIX认证 ********************************/auth_destroy( cl->cl_auth );cl->cl_auth = authsys_create_default();/********************************* * 加入TIMEOUT * man clnt_control可以看一下 ********************************/ if( clnt_control( cl, CLGET_TIMEOUT, ( char * )&tv ) == TRUE ){printf( "timeout:%ld sec, %ld usec/n", tv.tv_sec, tv.tv_usec );}if( clnt_control( cl, CLGET_RETRY_TIMEOUT, ( char * )&tv ) == TRUE ){printf( "retry timeout:%ld sec, %ld usec/n", tv.tv_sec, tv.tv_usec );}in.arg1 = atol( argv[2] );if( ( outp = squareproc_1( &in, cl ) ) == NULL ){printf("%s/n", clnt_sperror( cl, argv[1]) );}printf("result: %ld/n", outp -> res1 );return 0;} 

 

 

有square.x(RPC描述文件),client.h,client.c,server.c,test_c_plus_plus.cpp(引用client中方法测试)文件

执行步骤：

1，rpcgen square.x

2, gcc -c client.c square_clnt.c square_xdr.c

3, 生成静态库ar -rc libclientrpc.a *.o

4, 用G++：g++ test_c_plus_plus.cpp libclientrpc.a -lnsl -L. -I. -o testtest1

5, server不用静态库了，直接g++ server.c square_svc.c square_xdr.c -lnsl

7,运行./server

6,运行./client localhost 3 tcp

 

其中注意：因为G++是C++编译器，所以要将client.c相应的头文件中方法声明时候要加入extern "C"