various packages, pass down PKG_PRESERVE. Remove the default setting of
PKG_PRESERVE, it makes perfect sense to install e.g. pkgtools/mtree
and be able to remove it again, if it is not an essientiel tool.
OK jlam@
logic to all platforms:
Some packages (such as math/gap) create wrappers based on the name of
the compiler, so ${CC} should not contain any flags. Move flags into
CFLAGS.
files from the bootstrap kit. This package is used during bootstrap to
properly register the installed *.mk files.
The bootstrap bmake(1) utility uses some customised .mk files in order
to pre-define certain definitions and targets, which guide the build
process. This package provides those *.mk files for the bmake(1)
utility.
