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So far, our LDFLAGS for the BR2_BINFMT_FLAT case were only used on Blackfin. However, passing -elf2flt in LDFLAGS is wrong. Indeed, LDFLAGS are not linker flags, but flags passed to the compiler when linking. If you pass -elf2flt to the compiler when linking, it is understood as "-e lf2flt", i.e "the entry point is named lf2flt", which isn't exactly the intention. We in fact need to pass -Wl,-elf2flt in LDFLAGS as well, so that the compiler passes -elf2flt down to the linker. For some reason, this option does not cause an issue with the Blackfin toolchain, but it does with either a Buildroot toolchain for Cortex-M or an OSELAS toolchain for Cortex-M. We have verified that passing -Wl,-elf2flt continues to work with the Blackfin toolchain. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.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