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Update build notes to be more "walk through"-style

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Denver Gingerich 2014-10-25 19:45:56 -04:00
parent 813687673a
commit 60a400c18f
1 changed files with 40 additions and 14 deletions
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enforcement-case-studies.tex
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@ -830,22 +830,48 @@ the distributor and the purchaser of the hardware containing GPLed components.
% another section later?) about how it's ok to specify a specific build
% environment.
* Since the instructions didn't mention a specific distro to use, we ran the
build on an amd64 Debian 6 machine we had, after confirming the packages were
installed. In particular, we ran "make", as described in the instructions in
the README. The instructions said that "make menuconfig" could be used to
adjust the settings, but it appeared this step was optional ("Please note that
the default configuration is what was used to build the firmware image for
your router. It is advised that you use this configuration.") so we chose to
skip straight to the "make" step instead. This was done after extracting the
librecmc-v1.2.1.tar.bz2 tarball, which was not explicitly spelled out (this
should ideally be added to the README), but was implied by the
"u-boot_reflash" file (in the same directory as the README), which explicitly
used the other tarball. The build took about 40 minutes to run on our system.
* The actual building of the source code was completed in the following way:
** Since the instructions didn't mention a specific distro to use, we ran the
build on an amd64 Debian 6 machine we had. The only distro requirement was:
To build your own firmware you need to have access to a GNU/Linux system
(case-sensitive filesystem required).
** The README mentioned that:
"In order to build firmware images for your router,the
following needs to be installed :
gcc, binutils, bzip2, flex, python, perl, make, find,
grep, diff, unzip, gawk, getopt, libz-dev and libc headers."
So we ran "dpkg --list" and confirmed that each package was installed (this
is indicated by a leading "ii" on the line containing the package). Other
GNU/Linux distributions may have other ways of determing which packages are
installed.
** We then extracted the LibreCMC tarball by running
"tar --posix -jxpf /media/libreCMC_v1_2_1_SRC/librecmc-v1.2.1.tar.bz2". The
CD did contain another tarball (librecmc-u-boot.tar.bz2), but there appeared
to be separate instructions for that (in the u-boot_reflash text file in the
same directory). Having the README be more explicit about this would be nice
but did not ultimately prevent us from determing the proper steps to execute.
** The README mentioned the following optional step, which we skipped because
we did not need to modify the configuration for our initial build:
Please use "make menuconfig" to configure your appreciated
configuration for the toolchain and firmware. Please note that
the default configuration is what was used to build the firmware
image for your router. It is advised that you use this configuration.
** The next instruction was 'Simply running "make" will build your firmware.'
So we entered the "librecmc" directory that had been created from the above
"tar" command and then ran "make". The build took about 40 minutes to run on
our system.
% FIXME: Above, I'd like to see more ``walk through'' of the step by step
% instructions. The text is a bit terse: could be expanded to talk more.
% FIXME(dg): Hopefully the above will suffice. I can expand more/differently if
% such is desired.
* It was helpful to know that we could use "make menuconfig" for configuration
changes, as being able to modify the source is an important part of the GPL's