9

我正在使用gccunder编写一些代码，这些代码从我设置的高于所需的代码和我添加的链接器行cygwin中调用，但链接器仍然失败并显示以下消息：GetAdaptersAddressesiphlpapi.h_WIN32_WINNT0x0501-liphlpapi

gcc -liphlpapi build/obj/*.o -Wall -Wextra -o build/bin/asdf.exe src/asdf.cpp
/tmp/ccdjLPVY.o:asdf.cpp:(.text+0x153): undefined reference to `_GetAdaptersAddresses@20'
collect2: ld returned 1 exit status

一些片段来自asdf.cpp：

#if _WIN32_WINNT < 0x0501
  #warning _WIN32_WINNT was set lower than 0x0501, fixing
  #undef _WIN32_WINNT
  #define _WIN32_WINNT 0x0501
#endif
#include <winsock2.h>
#include <iphlpapi.h>

我知道他们在那里该死的：

strings /usr/i686-pc-mingw32/sys-root/mingw/lib/libiphlpapi.a  | sort | uniq | grep GetAdapters
__imp__GetAdaptersAddresses@20
__imp__GetAdaptersInfo@8
_GetAdaptersAddresses@20
_GetAdaptersInfo@8
GetAdaptersAddresses
GetAdaptersInfo

$strings /usr/lib/w32api/libiphlpapi.a  | sort | uniq | grep GetAdapters
__imp__GetAdaptersAddresses@20
__imp__GetAdaptersInfo@8
_GetAdaptersAddresses@20
_GetAdaptersInfo@8
GetAdaptersAddresses
GetAdaptersInfo

有人看到我错过了什么吗？

编辑：回答

# Change the order, put the linker options last:
# Before:
gcc -liphlpapi build/obj/*.o -Wall -Wextra -o build/bin/asdf.exe src/asdf.cpp
# After:
gcc            build/obj/*.o -Wall -Wextra -o build/bin/asdf.exe src/asdf.cpp -liphlpapi
4

2 回答 2

9

正如在这个问题中所解释的，gcc 参数的顺序很重要。您需要将库包含移动到依赖它的对象之后。

所以gcc build/obj/*.o -liphlpapi ...

于 2012-06-10T23:36:01.850 回答
1

尝试添加#pragma comment(lib, "Iphlpapi.lib")

于 2012-06-10T23:00:08.660 回答