制作动态链接在Mac OS X雪豹32位库64位共享库 [英] Making a 64 bit shared library that dynamically links to a 32 bit library on Mac OS X Snow Leopard
问题描述
更新：经过一些更多的阅读我认为，这个问题完全是一般的，你不能混用架构在同一个过程，所以64位Java不能的dlopen（）一个32位的库像FMOD。是否有任何可能解决此，牢记我写我自己的C接口FMOD库？
Update: After some more reading I see that this problem is totally general, you can't mix architectures in the same process, so 64 bit Java cannot dlopen() a 32 bit library like FMOD. Is there any possible workaround for this, keeping in mind I'm writing my own C interface to the FMOD library?
我需要一个64位的dylib在最大OS X 因为只有Java本地访问喜欢在64位机中的64位资料库。问题是，我的C源代码code动态包括FMOD它在Mac上只提供32位dylibs。当我尝试不-m32选项编译（因为我必须输出64位dylib）我得到以下错误：
I need to make a 64-bit dylib on Max OS X because Java Native Access only likes 64-bit libraries on 64-bit machines. The problem is, my C source code dynamically includes FMOD which on Mac only provides 32-bit dylibs. When I try to compile without the -m32 option (since I must output a 64-bit dylib) I get the following error:
gcc -dynamiclib -std=c99 -pedantic -Wall -O3 -fPIC -pthread -o ../bin/libpenntotalrecall_fmod.dylib ../../src/libpenntotalrecall_fmod.c -lfmodex -L../../lib/osx/
ld: warning: in /usr/lib/libfmodex.dylib, missing required architecture x86_64 in file
Undefined symbols:
"_FMOD_System_CreateSound", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_Channel_GetPosition", referenced from:
_streamPosition in ccJnlwrd.o
"_FMOD_System_Create", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_System_PlaySound", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_Sound_Release", referenced from:
_stopPlayback in ccJnlwrd.o
"_FMOD_Channel_IsPlaying", referenced from:
_playbackInProgress in ccJnlwrd.o
"_FMOD_System_Update", referenced from:
_streamPosition in ccJnlwrd.o
_startPlayback in ccJnlwrd.o
"_FMOD_Channel_SetPaused", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_System_Release", referenced from:
_stopPlayback in ccJnlwrd.o
"_FMOD_System_Init", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_Channel_SetVolume", referenced from:
_startPlayback in ccJnlwrd.o
"_FMOD_System_Close", referenced from:
_stopPlayback in ccJnlwrd.o
"_FMOD_Channel_SetCallback", referenced from:
_startPlayback in ccJnlwrd.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [all] Error 1
难道不应该能够从我的源$ C $ C动态包括32位库得到64位dylib？！
Shouldn't it be possible to get a 64 bit dylib from my source code that dynamically includes 32 bit libraries?!
推荐答案
正如您所指出的那样，你不能混用架构在同一个进程。
As you've noted, you can't mix architectures in the same process.
解决方法是再有的两个的过程。其中之一是一个32位的帮手的过程，链接到32位库，并通过一些IPC机制暴露了它的功能，另一种是64位Java进程链接到您自己的64位资料库。
The workaround is then to have two processes. One of them is a 32 bit "helper" process that links to the 32-bit library and exposes its functions through some IPC mechanism, and the other is the 64-bit Java process linked to your own 64-bit library.
您64位库启动辅助器进程，并提供一组功能，它实现通过传递请求到辅助处理过的IPC机构和返回结果。该IPC可以是简单的一对与管道创建匿名管道（）系统调用。
Your 64-bit library starts up the helper process, and provides a set of functions that it implements by passing requests to the helper process over the IPC mechanism and returning the results. The IPC can be as simple as a pair of anonymous pipes created with the pipe() system call.
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