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By default, the iputils build script might build binaries which are useless for certain applications, like tftpd or ninfod. Those binaries will add to the target filesystem size unless a post-build script removes them manually, which is cumbersome and doesn't shorten build times. In particular, in a certain aarch64 Buildroot project with musl selected as a C library, this patch allowed to shrink the full iputils package from 219 KiB (if every option is selected) to 63 KiB (with only the ping binary selected) - a 71.2% relative size decrease. Moreover, upstream recently introduced a commit that disabled tftpd from building by default, like rarpd. In the current state of things, this change will introduce inconveniences for Buildroot users which prefer to use the tftpd implementation provided by this package. With this patch, however, that decision and similar future ones won't be a concern, because they will have complete control of what binaries are built. These changes add Kconfig options which let the user select what binaries are built with ease. Signed-off-by: Alejandro González <alejandro.gonzalez.correo@gmail.com> 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