I checked out -current from cvs and trying to build system with something 
like:

DESTDIR=somedir MACHINE=i386 BUILDID=SYSTEM HOST_CC=/usr/local/bin/gcc 
HOST_CFLAGS="some flags" MKNLS=no ./build.sh distribution

then it compiles, and I see that for example as a part of build process 
gnu/texinfo is configured, but ./build.sh does not pass to its configure 
any flags like --disable-nls as MKNLS=no suggest.  Why is it so??

Also gnu/texinfo uses c++ additionaly to cc, but build.sh does not have 
nothing like HOST_CXX in addition to HOST_CC.