Just a heads-up for Persistence of Vision raytracer fans who might be trying to build version 3.7.0.RC7. You have to tell the linker to look in "libboost_system.so" for a symbol or two that used to be in "libboost_thread.so." (Just to be pedantic, I added an explicit link to boost_thread.)

Under "SLKCFLAGS" for x86_64:
...
LIBDIRSUFFIX="64"
++SLKLIBS="-lboost_thread -lboost_system"

then above CXXFLAGS in the configure command,

++LIBS="$SLKLIBS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
...
[I apologize for my inability to provide a simple diff file.]
With boost_system added, ld resolves all of the symbols and the build proceeds as advertised, which takes a while, so might as well go out for coffee while gcc creeps its petty pace.

Thanks!

That works perfectly.

-Lirey