up to slackware-10.2:
- CFLAGS="-O2 -march=i486 -mcpu=i686"
- bin dirs & contents root:bin
- $BUILD is 'agN' (N is actual build)

slackware-12.0
- no more "#!/bin/sh" header in doinst.sh
- CFLAGS="-O2 -march=i486 -mtune=i686"
- --build=$ARCH-slackware-linux
- change the following:
   was:	./configure <all sorts of options> &> configure.output
   was:	make $MAKEJOBS &> make.output
   was:	make DESTDIR=$PREPKG install &> make_install.output
    is:	./configure <all sorts of options> &> configure.output || exit 1
    is:	make $MAKEJOBS &> make.output || exit 1
    is:	make DESTDIR=$PREPKG install &> make_install.output || exit 1
- change anything else that may error out to 'foo || exit 1'
- bin dirs & contents root:root
- possibly use 'install' instead of 'cp' for docs & suchlike
- $BUILD is '${BUILD}_ejt' (curlies required)