anchao opened a new pull request, #12590: URL: https://github.com/apache/nuttx/pull/12590
## Summary libmetal/atomic: enable 64-bit atomic by toolchain builtin flags Fix compile error: ``` arm-none-eabi-ld: (remoteproc_virtio.o): in function `metal_io_read': metal/io.h:252: undefined reference to `__atomic_load_8' arm-none-eabi-ld: (remoteproc_virtio.o): in function `metal_io_write': metal/io.h:290: undefined reference to `__atomic_store_8' ``` Not all 32-bit architectures support 64bit atomic, gcc/clang toolchains have built-in properties to indicate whether support atomic64: ``` | $ arm-none-eabi-gcc -march=armv7e-m -dM -E - < /dev/null | grep SYNC | #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1 | #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1 | #define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1 ``` Signed-off-by: chao an <[email protected]> ## Impact N/A ## Testing CI-CHECK -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
