libm.so.4 not found

[Chris Maness]

How do I build 7.0 with libm.so.4 compatibility built in?  I find it on my 
6.3 system.  But not on my upgraded 7.0 system.

in reference to:

http://lists.freebsd.org/pipermail/freebsd-questions/2006-May/122264.html

I see that I should be able to add the variable:

COMPAT4X=yes

to /etc/make.conf but this flag is not recognized by the Makefile in 
/usr/src/.  Has this been obsoleted?  What is the correct way to add this 
compatibility if possible?

What is the function of ld-elf.so.1?

Thanks

Chris Maness
(909) 223-9179
http://www.chrismaness.com