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incdefs.sh try to define some flags with user_flags() and kernel_flags() functions. The later is looking at the kernel headers installed on the host when KBUILD_OUTPUT is not set. If no kernel headers are installed on the host, the grep fail and HAVE_ONESTEP_SYNC is not set on the command line: see: grep: /usr/include/linux/net_tstamp.h: No such file or directory So the missing.h define HWTSTAMP_TX_ONESTEP_SYNC which is also present in the kernel headers installed in STAGING_DIR (toolchain w/ headers >= 3.2). Indeed KBUILD_OUTPUT is empty because it's reset in the makefile, so move KBUILD_OUTPUT in the enviroment while calling "make"/ Also set KBUILD_OUTPUT to STAGING_DIR to find net_tstamp.h. While at it, use the same arguments for BUILD_CMDS and INSTALL_TARGET_CMDS. Thanks to Yann for the live review during the Buildroot summer camp. Fixes: http://autobuild.buildroot.net/results/364/36470db2c262d2e1fda5144a08cfe221831e093e Signed-off-by: Romain Naour <romain.naour@smile.fr> Cc: Petr Kulhavy <brain@jikos.cz> Cc: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.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