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gnutls source code uses the C++11 <atomic> functionality since7978a73346, which internally is implemented using the __atomic_*() gcc built-ins On certain architectures, the __atomic_*() built-ins are implemented in the libatomic library that comes with the rest of the gcc runtime. Due to this, code using <atomic> might need to link against libatomic, otherwise one hits build issues such as: ../lib/.libs/libgnutls.so: undefined reference to `__atomic_fetch_sub_4' on an architecture like SPARC. To solve this, link against libatomic if BR2_PACKAGE_HAS_LIBATOMIC is set. This fix gnutls build failures as well as cups, gnupg and libmicrohttpd Fixes: - http://autobuild.buildroot.org/results/1c7541fc6ac4b52d1dfe02a9a7d61db90f4521eb - http://autobuild.buildroot.org/results/42c8803b98e38ebd48870fe6b1a20a1d6c351e5f - http://autobuild.buildroot.org/results/a1e96d02d41f7fec0f5327f65fb34405f963a1e9 - http://autobuild.buildroot.org/results/59c92706457a9da29dd44425e546a7c80c18b454 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> (cherry picked from commite5a2354b6b) 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. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches