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The gcc sanity check should be checking for the atomic function directly instead of using the gcc macro. Older versions of gcc do not have the macro defined, but do support the atomic operations. (glib-2.0 checks for both the macro and the function, as long as one is available it will successfully compile.) Update the check to try both -mcpu=native and -mcpu=BUILD_ARCH. Tell the user which version worked properly. [YOCTO #4845] (From OE-Core rev: c126729b29822d3602c9c4fd9016cc79b6057fc5) Signed-off-by: Mark Hatle <mark.hatle@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>