+- use pkg-config files in the buildsystem?
- let the build system implement some make functions($(patsubst),$(wildcard),...) and use our own implementations where `make' does not support them
- include extra_flags.txt using Makefile construction if
supported by current make
VPATH = $self->{config}->{srcdir}:heimdal_build:heimdal/lib/asn1:heimdal/lib/krb5:heimdal/lib/gssapi:heimdal/lib/hdb:heimdal/lib/roken:heimdal/lib/des
srcdir = $self->{config}->{srcdir}
builddir = $self->{config}->{builddir}
+datarootdir = $self->{config}->{datarootdir}
BASEDIR = $self->{config}->{prefix}
BINDIR = $self->{config}->{bindir}