我正在尝试使用C语言在Windows API之上创建一个非常简单的抽象库。我制作了一个简单的Makefile,但是当我尝试使用Msys构建项目时,出现了以下错误:
winapi.o: In function `get_client_pid':
(long path)/winapi.c:13: undefined reference to `GetExtendedTcpTable'
(long path)/winapi.c:31: undefined reference to `GetExtendedTcpTable'
collect2.exe: error: ld returned 1 exit status
make: *** [lib] Error 1
get_client_pid()在winapi.c中被定义为:
#include <stdint.h>
#include <stdio.h>
#include <windows.h>
#include <Iphlpapi.h>
#define true 1
#define false 0
uint32_t get_client_pid()
{
MIB_TCPTABLE_OWNER_PID *tcpTable;
PDWORD tableSize;
DWORD ret = GetExtendedTcpTable(tcpTable,
tableSize,
true,
2,
TCP_TABLE_OWNER_PID_ALL,
0);
if (ret == NO_ERROR) {
printf("ERROR get_client_pid: No error with table size at 0?\n");
return 0;
}
if (ret != ERROR_INSUFFICIENT_BUFFER) {
printf("ERROR get_client_pid: No insufficient buffer with table size at 0?\n");
return 0;
}
printf("TABLE SIZE %d\n", *tableSize);
tcpTable = malloc(*tableSize);
ret = GetExtendedTcpTable( tcpTable,
tableSize,
true,
2,
TCP_TABLE_OWNER_PID_ALL,
0);
if (ret != NO_ERROR) {
printf("ERROR get_client_pid: GetExtendedTcpTable error: %d\n", ret);
free(tcpTable);
return 0;
}
int i;
for (i = 0; i < tcpTable->dwNumEntries; i++) {
MIB_TCPROW_OWNER_PID row = tcpTable->table[i];
if (row.dwRemotePort == 0x208 && row.dwRemoteAddr == 0x100007F) {
printf("FOUND PROCESS: %d\n", row.dwOwningPid);
free(tcpTable);
return row.dwOwningPid;
}
}
free(tcpTable);
return 0;
}
因为这是一个链接错误,所以我会添加我的makefile:
current_dir = $(shell pwd)
all: test
test: lib
gcc -c -g tests.c
gcc -o tests.exe tests.o -L$(current_dir) -lwinapi
lib:
gcc -c -g winapi.c
gcc -shared -o winapi.dll winapi.o -lIphlpapi -luser32
clean:
rm *.o
我必须说,我尝试了每一个可能的地方来插入“-lIphlpapi”,以防链接顺序出错,但那并没有起到帮助作用。