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https://sourceware.org/ml/gdb-announce/2018/msg00001.html gdb 8.1 has a new optional dependency on mpfr, which according to the NEWS file: GDB now uses the GNU MPFR library, if available, to emulate target floating-point arithmetic during expression evaluation when the target uses different floating-point formats than the host. At least version 3.1 of GNU MPFR is required. So for the target gdb, this is unnecessary, and therefore we forcefully disable mpfr support by passing --without-mpfr. For the host gdb, it would potentially be useful, but since it's a new feature that isn't essential, we for now keep it disabled as well. An option may be added later if needed. To avoid gnulib issues with uClibc/musl, we need to pass additional configure/make variables, like is done in OpenEmbedded [1]. [1] http://git.openembedded.org/openembedded-core/tree/meta/recipes-devtools/gdb/gdb_8.1.bb?id=02664a8dcd1ebb6cd77248e1b97a78390ea06033#n9 We re-add the same patches as the ones present for gdb 8.0.1, except 0004-nat-linux-ptrace.c-add-missing-gdb_byte-cast.patch, which was merged upstream. Signed-off-by: Romain Naour <romain.naour@gmail.com> [Thomas: change mpfr handling.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> |
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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