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Since its introduction in7d8a59b40, the BR2_x86_geode CPU target has pointed to GCC -march=geode which targets AMD Geode processors [0]. This arch tuning enables MMX and 3DNow! extensions in GCC but these are not currently reflected in the selected flags by BR2_x86_geode. This is likely due to the confusing naming and history of "Geode". The AMD Geode can trace its origins back to the Cyrix MediaGXm [1] and then to the NSC Geode GXm/GXLV/GX1/GX2 [2]. All of these processors have MMX instruction support listed in their datasheets. The NSC GX2 was the first in the series to enable 3DNow!. When7fed07d3a4introduced BR2_X86_CPU_HAS_MMX, Geode was skipped presumably because it wasn't clear that the target is AMD Geode and because the Wikipedia documentation for Geode is incomplete [2] with regards to supported instructions as they all support MMX. Whenf6cd56b9ceintroduced BR2_X86_CPU_HAS_3DNOW, Geode was skipped presumably for similar reasons. Note: the in-tree olpc_xo1_defconfig uses BR2_x86_geode which is fine as this hardware uses the AMD Geode [3]. Make it more clear that the target is AMD Geode by renaming the Kconfig menu option and add both MMX and 3DNow! flags to BR2_x86_geode. This also means that BR2_x86_geode_mmx is no longer needed, and can be removed. No legacy handling is needed since BR2_x86_geode_mmx has never been part of any release. [0]: https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/i386/geode.md;;hb=HEAD [1]: https://en.wikipedia.org/wiki/MediaGX#MediaGXm [2]: https://en.wikipedia.org/wiki/Geode_%28processor%29 [3]: https://wiki.laptop.org/go/Hardware_specification Signed-off-by: Vincent Fazio <vfazio@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 OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches