A way to build and install libpthread as 1:1 as well as M:N?

Daniel Eischen eischen at vigrid.com
Sun Jul 18 09:44:24 PDT 2004

On Sun, 18 Jul 2004, Robert Watson wrote:

> On Sun, 18 Jul 2004, Daniel Eischen wrote:
> > The way to do this so it is switchable without relinking the application
> > (and without using libmap.conf) is to use LD_LIBRARY_PATH.  You can
> > install libpthread built as 1:1 anywhere you like and just set
> > LD_LIBRARY_PATH to wherever it is installed. 
> > 
> > If you want both 1:1 and M:N versions of libpthread installed by
> > default, we have to decide where to install the 1:1 version.  I would
> > recommend 1:1 go in lib/lwp/libpthread.so.1 and M:N in
> > lib/libpthread.so.1.  You could change "lwp" to "kse"  or something
> > else.
> The issue here is my keeping everything in sync and making sure testing is
> reproduceable.  If I'm manually building and installing threading
> libraries, I'm likely to screw it up.  I was hoping for a mechanism in
> buildworld/installworld so that it all happens automatically, reducing the
> chances of user error, stale library versions, etc.

Well, like I said, if we can agree on a place to put the 1:1
version and what to call it, we can make it happen.  My suggestion
is to keep the libraries named the same, install them in different
places, and use LD_LIBRARY_PATH to switch between them.

Should I just do it, or is more discussion needed?

Dan Eischen

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