Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The rule for "git submodule update" was wrong, so the command was
always performed.  This is a pain if you are using commits in the
submodule that are not yet committed in the supermodule. This always
happens during development.

I'm sorry for the inconvienence, and I thank Aurelio for noting this.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Pretty often it happens that during trials we pick wrong external
functions (e.g., "printf") and the final link claims horribly about
dozens of undefined symbols.  By having an intermediate wrc.o we can
easily check which are the symbols we really leave undefined for libc
and libgcc to fill, before they resolve them by asking for something
else.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This renames ram.ld to ram.ld.S, adding a preprocessing rule. The
commit has no techcnical effect: it is only preparation for the next one.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This adds copyright notes to all non-trivial source files,
unless they where already there (i.e. dev/endpoint.c alone).

I found authorship using the following script, run on commit "a2721762


documentation updated" (i.e, before automatic reindentation and other
trivial stuff by me):

  git grep -l . | grep -v sockitowm/ | \
  while read F; do
       echo "##### $F"
       git blame -w $F | \
         sed -e 's/^[^ ]* .//' -e 's/-[0-9][0-9]-[0-9][0-9] .*$//' | \
         sort | uniq -c | sort -rn
  done

Then I augmented each file with this boilerplate:

/*
 * This work is part of the White Rabbit project
 *
 * Copyright (C) 2011 CERN (www.cern.ch)
 * Copyright (C) 2011,2012 CERN (www.cern.ch)
 * Copyright (C) 2012 CERN (www.cern.ch)
 * Copyright (C) 2011 GSI (www.gsi.de)
 * Copyright (C) 2011,2012 GSI (www.gsi.de)
 * Copyright (C) 2012 GSI (www.gsi.de)
 * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 * Author: Grzegorz Daniluk <grzegorz.daniluk@cern.ch>
 * Author: Wesley W. Terpstra <w.terpstra@gsi.de>
 *
 * Released according to the GNU GPL, version 2 or any later version.
 */

Then I removed all the lines that didn't apply. Sometimes I reordered
the authors to reflect who is the main author.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Remove all unneeded stuff from the linker script. Now the script only
includes what is actually used: it is easier to understand and change
(we'll add some local ELF sections), and it makes a better reference
for possible porting to a different architecture.

This commit also moves the default libraries from the linker script
itself to the LDFLAGS in Makefile, where they really belong.

CONFIG_DETERMINISTIC_BINARY confirms this makes no difference in
the generated binary (nor the ELF FWIW).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Instead of picking libraries from the linker script, common practice
is listing them in LDFLAGS. This simplifies review and modification.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

CONFIG_DETERMINISTIC_BINARY confirms this makes no difference in
the generated binary.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

It also used cflags-y in the same way.

CONFIG_DETERMINISTIC_BINARY confirms this makes no difference in
the generated binary, but it opens to more configuration options.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This also removes the run of $SIZE on all object files, as the
previous content of the screen is often more important for me.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This doesn't change the behavior of any command, but adds revision.c
as a real source file rather than something created by make using
"echo ... > revision.c".  In any case, the file is recompiled
each time you call "make", so the date and time reflect the last
build.

However, this introduces CONFIG_DETERMINISTIC_BINARY (that nobody
sets at this point in time) to build a binary withouth __DATE__
and __TIME__ strings, so it is the same at every rebuild. See
next commit.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This has been verified to properly obey the new CONFIG_ETHERBONE
settin.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Commit "5433fa2f

 Makefile: three fixes" introduced a bug, so that a
fresh clone fails to compile because of a missing "board.h" file.

This makes all objects depends on the symlink, which in turn is
removed by "make clean", so you don't need to start from a fresh clone
to experience the complete build.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Conflicts:

	Makefile

This fits in 80 columns and makes other space cleanups, but
there is no functional change.

We'll need to touch it seriously when adding Kconfig and ppsi as
an alternative to ptp-noposix, so I'd better have it readable before
changing the meat in there.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Conflicts:

	Makefile

I'd better set CROSS_COMPILE in the environment than change my path,
so CROSS_COMPILE is conditionally assigned.

The revision is better "git describe --dirty" than "git rev-parse". The output
is a short beautiful string like "wrpc-v2.0-13-g09a736d5

"
with an optional "-dirty" trailer, to show we compiled a non-committed
change.

Finally, to execute commands we dont $(shell) at toplevel, but have
them in the build rule.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

If you find this patch with "git blame" please use "git blame -w"
to have all white-space ignored while associating lines to commits.

This commit has no practical effect but cleanup. I made it
with sed like this:

  git grep -l '[ \t]$' | xargs sed -i 's/[ \t]*$//'

However, I had to manually restore doc/wrpc_mon.png after the fact.
Similarly, I restored the include/hw/*regs.h files, as they
are (most likely) auto-generated.

Read the MAC address either from EEPROM or sensor ID (preferring EEPROM).

This commit can be omitted when merging back to master, but not all the following commits.

Makefile: added Etherbone enable/disable switch, fixed --gc-sections linker arg (saves 6 kB of code)