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This commit adds a patch to Boost to make it use the eventfd() function provided by the C library when uClibc is used, rather than falling back to using directly the __NR_eventfd system call. This fixes the build on ARC, which doesn't define __NR_eventfd. The original problem is that uClibc pretends to be glibc 2.2, which didn't had eventfd(), so Boost makes the system call manually. uClibc-ng, in its next release, will pretend to be glibc 2.10 (see http://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=4ff3a6c8eb91db71d6dc3d2932b66e848bd20ac3), which will also fix the problem, but requires bumping the uClibc version, rebuilding the external toolchains, and so on. Ideally, Boost should be doing a compile test to detect if eventfd() is available or not, but the Boost build system is so brain-damaged that doing so would require way too much effort. Fixes: http://autobuild.buildroot.org/results/22b/22b710346d2cd78b7b51cdccd18d670bb6ac5d24/ and many similar build failures [Peter: minor tweaks to description] 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.