如何解决未定义的引用_imp __ *？ [英] How do I fix undefined reference to _imp__*?

问题描述

我试图编译的东西，取决于gtkspell，这
取决于附魔，MinGW的下。我越来越喜欢错误
   gtkspell / gtkspell.c：757：未定义引用'_imp__enchant_broker_init
我怀疑这是不是因为这样的事实，我试图链接
againt一个{静态，动态}当我应该链接到的库
另外一个，或者是因为只有一个下划线小鬼前
应该有两个;我得到

  $ objdump的-t /d/opt/enchant-1.6.0/lib/libenchant.a | grep的enchant_broker_init
[85]（秒1）（FL×00）（TY 20）（SCL 2）（NX 0）0x00002ac0 _enchant_broker_init
 

和

  $ objdump的-t /d/opt/enchant-1.6.0/lib/libenchant.dll.a | grep的enchant_broker_init
[6]（秒1）（FL 0×00）（TY 0）（SCL 2）（为nx 0）00000000 _enchant_broker_init
[7]（秒3）（FL 0×00）（TY 0）（SCL 2）（为nx 0）00000000 __imp__enchant_broker_init
 

互联网
（http://lists.freedesktop.org/archives/gstreamer-devel/2007-January/013975.html）
表明小鬼识别码来源于

  _declspec（DLL {进口，出口}）
 

虽然附魔似乎用

  __ declspec（DLL {进口，出口}）
 

，并注释掉相关线路中enchant.h使得gtkspell.c
要求 enchant_broker_init ，而不是 _imp__enchant_broker_init ，但
并没有改变，在libenchant显示的符号。有没有一种方法
使GCC没有裂伤的名称，或者有没有人有什么想法
可能会错误/如何解决？

下面是转载我的系统上的问题，一个最小的例子：

如果我有内容的文件enchanttest1.c

 的#include＆LT;＆stdio.h中GT;
＃包括LT＆;＆enchant.h GT;诠释的main（）
{
#IFDEF ENCHANT_MODULE_EXPORT
    的printf（\\ nEnchant找到\\ n）;
＃其他
    的printf（\\ nEnchant没有找到\\ n）;
＃万一
    返回0;
}
 

和内容的文件enchanttest2.c

 的#include＆LT;＆stdio.h中GT;
＃包括LT＆;＆enchant.h GT;诠释的main（）
{
    EnchantBroker * B = enchant_broker_init（）;
#IFDEF ENCHANT_MODULE_EXPORT
    的printf（\\ nEnchant找到\\ n）;
＃其他
    的printf（\\ nEnchant没有找到\\ n）;
＃万一
    返回0;
}
 

然后

  GCC enchanttest1.c`pkg配置--cflags enchant`＆放大器;＆安培; ./a.exe
 

给附魔找到，但

  GCC enchanttest2.c`pkg配置--cflags enchant`＆放大器;＆安培; ./a.exe
 

给

  C：\\用户\\ JASONG〜1 \\应用程序数据\\本地的\\ Temp \\ ccyDLptc.o：testenchant.c :(文字+ 0xF的）：未定义的参考`_imp__enchant_broker_init
collect2：劳工处返回1退出状态
 

解决方案

要解决我的小例子，该方法是添加 - 库在 --cflags ; GCC找不到要链接的库。

我能够（树胶（http://dev.midnightcoding.org/projects/gummi））的修复，我是在用更复杂的code，我本来试图编译运行问题通过 LDFLAGS =$（pkg配置--cflags --libs gtkspell-2.0附魔）CFLAGS =$（pkg配置--cflags --libs gtkspell-2.0附魔）来配置脚本;这个问题似乎已经该参数在gcc的顺序错误过去了，它找不到附魔，当它试图链接gtkspell。

I'm trying to compile something that depends on gtkspell, which depends on enchant, under MinGW. I'm getting errors like gtkspell/gtkspell.c:757: undefined reference to '_imp__enchant_broker_init' I suspect this is either due to the fact that I'm trying to link againt a {static,dynamic} library when I should be linking against the other one, or because there's only one underscore before the imp and there should be two; I get

$ objdump -t /d/opt/enchant-1.6.0/lib/libenchant.a | grep enchant_broker_init
[ 85](sec  1)(fl 0x00)(ty  20)(scl   2) (nx 0) 0x00002ac0 _enchant_broker_init

and

$ objdump -t /d/opt/enchant-1.6.0/lib/libenchant.dll.a | grep enchant_broker_init
[  6](sec  1)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 _enchant_broker_init
[  7](sec  3)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __imp__enchant_broker_init

The internet (http://lists.freedesktop.org/archives/gstreamer-devel/2007-January/013975.html) suggests that the imp mangling comes from

_declspec(dll{import,export})

though enchant seems to use

__declspec(dll{import,export})

, and commenting out the relevant lines in enchant.h makes gtkspell.c request enchant_broker_init rather than _imp__enchant_broker_init, but doesn't change the symbols that show up in libenchant. Is there a way to make gcc not mangle the names, or does anyone have ideas about what might be going wrong/how to fix it?

Here's a minimal example that reproduces the problem on my system:

If I have a file enchanttest1.c with contents

#include <stdio.h>
#include <enchant.h>

int main()
{
#ifdef ENCHANT_MODULE_EXPORT
    printf("\nEnchant found\n");
#else
    printf("\nEnchant not found\n");
#endif
    return 0;
}

and a file enchanttest2.c with contents

#include <stdio.h>
#include <enchant.h>

int main()
{
    EnchantBroker *b = enchant_broker_init();
#ifdef ENCHANT_MODULE_EXPORT
    printf("\nEnchant found\n");
#else
    printf("\nEnchant not found\n");
#endif
    return 0;
}

then

gcc enchanttest1.c `pkg-config --cflags enchant` && ./a.exe

gives Enchant found but

gcc enchanttest2.c `pkg-config --cflags enchant` && ./a.exe

gives

C:\Users\JASONG~1\AppData\Local\Temp\ccyDLptc.o:testenchant.c:(.text+0xf): undefined reference to `_imp__enchant_broker_init'
collect2: ld returned 1 exit status

解决方案

The way to fix my minimal example is to add --libs after --cflags; gcc couldn't find the library to link against.

I was able to fix the problem that I was running in to with the more complicated code that I was originally trying to compile (gummi (http://dev.midnightcoding.org/projects/gummi)) by passing LDFLAGS="$(pkg-config --cflags --libs gtkspell-2.0 enchant)" CFLAGS="$(pkg-config --cflags --libs gtkspell-2.0 enchant)" to the configure script; the problem seems to have been that the arguments to gcc were passed in the wrong order, and it couldn't find enchant when it was trying to link gtkspell.

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