Instead of >= 44 Makefile.am's we now only have one top-level
Makefile.am, and use the 'subdir-objects' automake option to
handle the build via non-recursive (auto)make.
This has the advantage of fewer (boilerplate or other) files and less
clutter in general, as well as performance advantages since the new
setup can build many files in parallel (with 'make -j'), not only 2 or 3
files within the same (e.g. hardware/xxxx/* subdirectory) and also since
we no longer need to build intermediate libtool helper libs per subdirectory.
A quick, non-scientific test build on a quad-core laptop with 'make -j 4'
yields a build time reduction from 35s to 19s.
All autotools features that worked before are still intact without any
regressions, including the Make targets 'install', 'uninstall', 'check',
'dist', 'clean', 'distclean' and so on, as well as all the usual portability
handling (build works on any OS, with any Make implementation such as
GNU Make or BSD Make, with any shell such as sh/ksh/zsh/bash/dash, etc. etc.)
and features such as out-of-tree build support, cross-compile support,
testsuite support (also with colored output), "silent make rules", etc. etc.
Two error checks had a missing "ret = ", which lead to an incorrect
value being passed to libusb_error_name().
Also, lower the level for those messages from sr_err() to sr_dbg()
since they're not fatal.
(parse_contents): Do not call sr_dbg() on every signal change.
This would be excessive even for sr_spew().
(read_until): Do not call ftell() just to be able to show some
number in a debug message later on.
These commands are superfluous and do not seem to make sense in
the context they were used. Also, $dumpvars was missing an $end,
and $dumpoff was used without any content.
Avoid writing a new timestamp for every changed signal if multiple
signals change state simultaneously. Also, keep signal transitions
on the same line with their timestamp to make the output easier to
inspect in a text editor. (VCD does not care whether newlines or
spaces are used to separate tokens.)