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For reproducible builds, SOURCE_DATE_EPOCH will be set to the git commit date if it is not defined in the environment, but this was done by explicitly using $(TOPDIR)/.git as the git repository, which would not give the expected result if Buildroot had been put into a subdirectory of another repository. This commit removes that restriction, meaning that the default date will now be the date of the git commit that contains Makefile, regardless of what level above Makefile the repository is at. This works because the current directory when the 'git log' command is executed will always be the directory containing Makefile (it must be, since TOPDIR is set from CURDIR). In general this should be a sensible default, and in cases where a different date is required SOURCE_DATE_EPOCH can be defined in the environment before invoking make. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches