Re: [Boost-users] [version 1.38.0] Problems with dynamic linking to boost libraries

Subject: Re: [Boost-users] [version 1.38.0] Problems with dynamic linking to boost libraries
From: Juan Antonio Farré Basurte (jafb_at_[hidden])
Date: 2009-03-12 16:25:47

Thanks a lot for all this detailed and useful information :)
Regards,

Juan

>> I've added /usr/local/lib to
/etc/ld.so.conf and now it works.
>> What I don't understand is why the linker didn't complain (the
>> problem was when
executing),
> 
> That's actually the way dynamic linking works under UNIX: You tell the
> linker
> which libraries
to link with, but aren't tied to this library location
> when
> you deploy the program (e.g. on a different computer). Hence you use
the
> -L directive to tell gcc/ld where to look for libraries (shared or
> static),
> and have to edit ld.so.conf to tell
the dynamic linker (the program
> which
> looks through all referenced dynamic libraries for symbols when you
> start
> your executable) where to look for libraries when running executables.
> 
> Note, that you don't have to edit ld.so.conf: you
could instead set
> the variable LD_LIBRARY_PATH to the library location (works like
> the PATH environment variable, so you can
provide multiple paths
> separated by colons). This way you can accomplish your task without
> super user privileges. Note, that the
variable is called
> DYLD_LIBRARY_PATH
> on Mac OSX systems.
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