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Re: build configuration help
From: |
Bob Rossi |
Subject: |
Re: build configuration help |
Date: |
Thu, 03 Apr 2008 11:03:27 -0400 |
User-agent: |
Mutt/1.5.15+20070412 (2007-04-11) |
On Thu, Apr 03, 2008 at 08:55:27AM -0600, John Calcote wrote:
> Bob Rossi wrote:
>> If I put it in the lib directory on other platforms, on startup, how
>> will the binary know where to find the .so? That's why I was asking
>> about LD_LIBRARY_PATH, and creating a script....
>>
> Okay, let me ask a few questions to clarify your situation. First, is this
> library being loaded by the linker at runtime, or is it dynamically loaded
> by your application, using dlopen/dlsym/dlclose (Linux), or
> LoadLibrary/GetProcAddress/FreeLibrary (Win32)?
I'd like the linker to load it at runtime.
> On Unix systems the "library path" is configured in your application, and
> in the system. Libraries are searched for (in general) in the system linker
> cache, which by default contains (at least) "/usr/local/lib:/usr/lib:/lib",
> as well as others in most cases. If your library is being loaded by the
> system at app init time, then it should have no trouble finding your
> library if it's installed in one of these two places. Here's some text I
> copied (shamelessly) from the ld man page:
Will it only work if I install with the default installation directory?
What if I change the --prefix=/home/bob/foo. Will /home/bob/foo/bin/bar
be able to find /home/bob/foo/lib/wxwidgets.so ?
> The linker uses the following search paths to locate required
> shared libraries.
>
> 1. Any directories specified by -rpath-link options.
>
> 2. Any directories specified by -rpath options. The
> difference between
> -rpath and -rpath-link is that directories specified by
> -rpath options are
> included in the executable and used at runtime, whereas
> the -rpath-link
> option is only effective at link time. It is for the native
> linker only.
OK, I didn't know this. That's awesome. Is this something that I can
count on being portable? Meaning, will it work on all the unix systems
you know about, or is it only a feature of gnu ld?
Thanks for the great help,
Bob Rossi
- build configuration help, Bob Rossi, 2008/04/03
- Re: build configuration help, John Calcote, 2008/04/03
- Re: build configuration help, Bob Rossi, 2008/04/03
- Re: build configuration help, NightStrike, 2008/04/03
- Re: build configuration help, John Calcote, 2008/04/03
- Re: build configuration help,
Bob Rossi <=
- Re: build configuration help, John Calcote, 2008/04/03
- Re: build configuration help, Bob Rossi, 2008/04/03
- Re: build configuration help, Andreas Schwab, 2008/04/03
- Re: build configuration help, John Calcote, 2008/04/03