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The cairo package fails to build on some architectures: BR2_TOOLCHAIN_HAS_LIBATOMIC is enabled, but libatomic is in fact not available. This happens because the gcc logic in libatomic/configure.tgt does not recognize "uclinux" as a valid OS part of the target tuple, and therefore it does not build libatomic. The "uclinux" part of the tuple is used by Buildroot when BR2_BINFMT_FLAT=y, so we make BR2_TOOLCHAIN_HAS_LIBATOMIC enabled only if !BR2_BINFMT_FLAT. It is worth mentioning that support for the uclinux tuple could most likely very easily be added to gcc: it could rely on the generic "posix" implementation of libatomic, which uses pthread locks, available on all architectures where thread support is available. Fixes: [arm] http://autobuild.buildroot.net/results/3d8dc45e41a043d2c2c26bfb26c3617499fbe671 [m68k] http://autobuild.buildroot.net/results/318e01406e3e92eb589ee5b2231c671a4dbb6da4 Signed-off-by: Romain Naour <romain.naour@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> [Thomas: adjust dependency after analysis of the gcc code.] 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