Fix misleading indentation warnings

Add GPL license text file

Fixes the following warnings:

 lbp.c: In function 'lbp_send':
 lbp.c:43:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    43 |     if (LBP_SENDRECV_DEBUG)
       |     ^~
 lbp.c:45:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    45 |  return send;
       |  ^~~~~~
 lbp.c: In function 'lbp_recv':
 lbp.c:55:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    55 |     if (LBP_SENDRECV_DEBUG)
       |     ^~
 lbp.c:57:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    57 |  return recv;
       |  ^~~~~~

Signed-off-by: Damian Wrobel <dwrobel@ertelnet.rybnik.pl>

Add missing license text file which is needed to package mesaflash
for Fedora linux distribution.

The following command was used to obtain the license text file:
 $ wget -O COPYING https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt



Signed-off-by: Damian Wrobel <dwrobel@ertelnet.rybnik.pl>

Update README

add: make install

Minor fixes

Some debian changelog parsing tools don't like it if there isn't a
single changelog entry.  This commit adds a placeholder changelog entry
to placate those tools.

fall back to 8-bit word if 32-bit per word set fails.  Recognize fall…

New ethernet boards

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

fall back to 8-bit word if 32-bit per word set fails.  Recognize fallback and reorder buffer to compensate for int to byte change.

make: fix dependency problem

spi: print accurate address where we looked for cookie

debian: Add rules to create a +dfsg tarball

Misc improvements

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

At the next release, this will require
 * Creating a tag on github like "v3.2.0"
 * Using a Debian version number like "3.2.0+dsfg-1"
but it will get us what we want for a Debian package (a source tarball
that excludes the non-DFSG-free 'winio' packages) without breaking the
mesaflash git repository's ability to build for/on Windows.

Since there are no tags at the moment, I tested this by temporarily
naming jepler/mesaflash in debian/watch, and creating a tag there.
It seems to work.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

All these produced a diagnostic when -Wunused-variables was specified.

These functions always produced diagnostics with -Wreturn-type enabled.
Add an explicit 'return 0;' to indicate success.

Before this fix, enabling -Wpointer-sign would produce a diagnostic.
lbp_recv_packet doesn't care about the sign of its argument, but
strcmp and strncpy do.

These functions are reported as unused when -Wunused-function is enabled.

The compiler warns 'field precision specifier ‘.*’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’
[-Wformat=].  Add an explicit cast to int.

This can be skipped with the new commandline flag --no-auto-verify.

Don't automatically try to rewrite the boot block.  Instead, require the
--fix-boot-block flag to be given in order to do so.

Closes #13

pci: Cannot use memcpy() for PCI accesses

On some platforms (such as Debian Jessie amd64), this leads to failures
like this:

    $ sudo mesaflash --device 5i24 --write 5i24_16_svst4_8.bit
    Checking file... OK
      File type: BIT file
    Erasing sector 0 for boot block
    BootBlock installed
    Failed to write valid boot sector

    You must power cycle board or use --reload command to load updated firmware.

I twigged to this fact upon seeing '__memcpy_sse2_unaligned' in the
debugger, which put me in mind of the fix we applied 3 years ago
in linuxcnc at commit 12ba77d3b.

Closes #4.

When building with a large "-j" value, the build could fail with a message like
    gcc -o mesaflash mesaflash.o libanyio.a -lpci -lm
    gcc: error: libanyio.a: No such file or directory
    Makefile:70: recipe for target 'mesaflash' failed
    make: *** [mesaflash] Error 1
make mesaflash explicitly depend on libanyio.a to avoid this.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

Fixed spelling in error messages

issues compiling under gcc 5.1.1 on fedora 22 x86_64