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Python is not able to detect if compiler double representation is compliant with IEE754: checking whether C doubles are little-endian IEEE 754 binary64... no checking whether C doubles are big-endian IEEE 754 binary64... no checking whether C doubles are ARM mixed-endian IEEE 754 binary64... no Accordingly 'legacy' mode isused. It is possible to check this at runtime by check if 'sys.float_repr_style' contains 'short' or 'legacy'. Calculus correctness is not garanteed with 'legacy'. Problem is better described here: http://stackoverflow.com/questions/29920294/what-causes-pythons-float-repr-style-to-use-legacy https://bugs.python.org/issue7117 However, all gcc architecture use a representation compliant with IEE754. So, we can enable it unconditionnaly. Signed-off-by: Jérôme Pouiller <jezz@sysmic.org> [Thomas: rework condition to not use strip, as suggested by Baruch.] 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