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We were passing HOSTCFLAGS="$(HOSTCFLAGS)" to Linux. However: - HOSTCFLAGS in Buildroot doesn't exist, and is empty, so this assignment never did anything. The name of the variable in Buildroot in HOST_CFLAGS. - HOSTCFLAGS in Linux isn't used everywhere, and passing it overrides the default HOSTCFLAGS value defined in the main Linux kernel Makefile. In addition, there is no way to pass additional host LDFLAGS in the Linux kernel build system. Therefore, we simply shoehorn our HOST_CFLAGS and HOST_LDFLAGS while passing HOSTCC to the Linux kernel build system. This has been tested to work fine with host OpenSSL and host libelf only available in $(HOST_DIR). Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Tested-by: Frank Hunleth <fhunleth@troodon-software.com> 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 Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches