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Compiling for another system - question

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Compiling for another system - question BSD Help forum discussing all BSD based operating systems including FreeBSD, OpenBSD, NetBSD, and more. BSD refers to the distribution of UNIX originally developed by the University of California at Berkeley.

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  #1  
Old April 29th, 2005, 11:57 AM
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Compiling for another system - question
Hey guys;

I've got a package that I want to compile on my development box (FreeBSD5.3) which is supposed to run on an embedded platform running FreeBSD4.9.
When I build the program, its looking for ld-elf.so.1 under /libexec (which is where it is on my machine) but its under /usr/libexec on the embedded target. Is there a way I can build it so that when I put it on the embedded system, it looks for ld-elf.so.1 in /usr/libexec? A linker option? Can it be done?

As you can tell I have a load of experience in this area

Thanks!

Ben Z
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Old April 29th, 2005, 12:23 PM
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It's been a while since I've been on a FreeBSD machine, and I've never done what you're wanting to do, so keep that in mind.

Would it be possible to create a sym link on the embedded box that points /libexec to /usr/libexec?

Are you compiling via pkg_add and such or "by hand"?
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Old April 29th, 2005, 02:19 PM
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I'm trying to compile by hand.

I hadn't even thought of making a link :P Thanks.

The only other problem its caused now is that I think I have to statically link a couple of missing libraries into the module.. Is there a way to tell the linker to do that?

BZ
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Old April 29th, 2005, 02:23 PM
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There should be a way to specify directories when you ./configure. Try ./configure --help and see what options you have.
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Old April 29th, 2005, 03:32 PM
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WTF? I don't see a problem here. The .so file is a shared object (i.e.) a dynamically linked library. The loader looks in the standard directories for it. /libexec and /usr/libexec should both be in the list of standard directories. You can also change the list of searched directories using ldconfig, or editing the LD_LIBRARY_PATH shell variable.
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Old May 2nd, 2005, 05:10 PM
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Quote:
Originally Posted by Scorpions4ever
WTF? I don't see a problem here. The .so file is a shared object (i.e.) a dynamically linked library. The loader looks in the standard directories for it. /libexec and /usr/libexec should both be in the list of standard directories. You can also change the list of searched directories using ldconfig, or editing the LD_LIBRARY_PATH shell variable.


Is there any way to specify during compilation which version of a shared library it should link against at runtime? I'm building on 5.3 and it has a newer version of libm than my 4.9 environment. Even though I am telling autoconf to build for 4.9, the program is still trying to link against the wrong version of libm.
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Old May 5th, 2005, 10:51 AM
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Is it true that you can't backwards compile? I was explaining the situation to a friend, and he tells me that you can't compile for 4.9 from a 5.3 system.
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