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Build ID is added to binaries at link time. Building in different output directories causes some packages to have different Build IDs, thus resulting in non-reproducibility. Adding "-Wl,--build-id=none" fixes this issue by disabling setting of Build ID. Diffoscope output for Build ID issue: https://gitlab.com/snippets/1886180/raw After this patch, build is reproducible - i.e. diffoscope does not produce any output. Signed-off-by: Atharva Lele <itsatharva@gmail.com> Reviewed-by: Romain Naour <romain.naour@smile.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