Use "-include" rather than "include" for the generated Makefile
fragments, in order to suppress the long list of warnings that
otherwise appears at the start of a clean build.

Contributed by Edward Waugh <ewaugh@netxen.com>

Remove src/Config as it has no more users, and conflicts with
src/config on case-deficient filesystems.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

This "+" should be removed when a tarball release is done.

Revert "Use .SECONDARY instead of .PRECIOUS for bin/%.tmp targets."

This reverts commit de29e5a39c.

.SECONDARY doesn't seem to work properly with the target patterns of
implicit rules.  In particular, a "make clean ; make bin/rtl8139.dsk"
will correctly leave the bin/rtl8139.dsk.tmp file present when .PRECIOUS
is used, but not when .SECONDARY is used.

This is slightly irritating since we don't want the
"do-not-delete-if-interrupted" semantics of .PRECIOUS, but it seems to be
the best compromise.

During development it is often handy to change the config.h options from
their defaults, for example to enable debugging features.

To prevent accidental commits of debugging config.h changes, mdc
suggested having a config-local.h that is excluded from source control.
This file acts as a temporary config.h and can override any of the
defaults.

This commit is an attempt to implement the config-local.h feature.

The config.h file now has the following as its last line:
/* @TRYSOURCE config-local.h */

The @TRYSOURCE directive causes config-local.h to be included at that
point in the file.  If config-local.h does not exist, no error will be
printed and parsing will continue as normal.  Therefore, mkconfig.pl is
"trying" to "source" config-local.h.

ROMs will refuse to build unless pci_vendor_id and pci_device_id are
defined.  We probably ought to fix up the Makefile (and the ROM prefix) so
that they're required only for PCI ROMs, but this will do for now.

Using -MM strips out any system header files from the dependency list,
which means that we could safely use an external stdarg.h if we wanted
to.

Deleting bin/deps after "make veryclean" keeps deps from being
regenerated in the tarball.

Added 'install' and 'configure' targets for those who are used
to other build setups.

src/bin/%.tmp files can be useful for debugging, so let's keep them.

for "echo -e" on the host system.

suitable "echo -e" substitute.

implement the -e option.

(Thanks to Jim McQuillan for this suggestion.)

Inhibit -Werror when generating Makefile rules, to prevent warnings
from killing the dependency list.

into account (and so remove the false positives due to .tbl.* symbols).

bin/%.bin target.

This reverts commit fc5f6c9de2.

Reverted commit breaks the much more common case of changing the debug
options in subsequent builds without any code changes.

other.

Create something that might be usable as a symbol list for bochs'
internal debugger.

getting suppressed.  :(

Change from using #if to #ifdef, since #if can't cope with string
constants.

Don't use -MP to generate phony rules for included files, otherwise
make won't use the pattern rule for config/%.h.  :(