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As found out by Yann [1], binutils will use its bundled copy of zlib, whether it is already provided by the system or not, and unless explicitly told to use the system zlib with --with-system-zlib, which is available since version 2.21 and700d40ca16This will fix the following build failure with oprofile when compiling in a static configuration where zlib is not enabled: checking for bfd_openr in -lbfd... no checking for compress in -lz... no configure: error: libz library not found; required by libbfd As found out by Arnout [1], this fails infrequently because static is already pretty rare, but in addition zlib is almost always selected by some other package. Fixes: - http://autobuild.buildroot.org/results/0e1d16dfbb455a08db80ac5d35613908c3b4163f [1] https://patchwork.ozlabs.org/project/buildroot/patch/20211030214734.2154583-1-fontaine.fabrice@gmail.com/ Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> [yann.morin.1998@free.fr: - reword the explanations about the system zlib - extend the oprofile example with static and !zlib ] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> (cherry picked from commita3c1ba68f4) Signed-off-by: Peter Korsgaard <peter@korsgaard.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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches