Re: ideas about threading lib switching

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Simon 'corecode' Schubert wrote:
> Have a generic "proxy" lib called libpthread.so.0 or so, which defines 
> the available functions and where all binaries can be linked against.  
> This lib however does not provide any functionality.  Instead, there 
> would be some way that this lib (or rtld, or so)  decides on execution 
> time (or whenever it is being runtime linked) which real threading lib 
> to load.  Some sort of objformat, just for libs.

Okay, I got it to work.  Remember:  never use ld to link libs, always use gcc (gotta check our makefiles).

Basic principle of operation:

1. have a proxy.so which defines the available functions as weak references.

2. proxy lib has a constructor which performs a dlopen(), depending on an environment variable or whatever.

however, this does not work for proxy.so being opened with dlopen().

so, opinions on which way to use?

cheers
 simon

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