Hello - I'm new to OpenWRT development and I'm in the process of porting an application from Ubuntu x86 to OpenWRT.
The target platform is MIPS32 (GL-AR150): CONFIG_TARGET_ar71xx_generic_Default=y I have my package compiling and the desired .ko file is produced, but when I flash the image and attempt to insmod on the target device, I get the following error: Unknown symbol __sync_val_compare_and_swap_4 (err 0) This makes sense given the warning I see in the compile log: WARNING: "__sync_val_compare_and_swap_4" [...] undefined! I've done a fair bit of googling on this, and I can see that this is a problem with the atomic builtins as described here: https://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html "Not all operations are supported by all target processors. If a particular operation cannot be implemented on the target processor, a warning will be generated and a call an external function will be generated. The external function will carry the same name as the builtin, with an additional suffix `_n' where n is the size of the data type." Can anyone suggest a solution? I have tried adding "-latomic" and "-lgcc" to my linker flags, but that is not helping (first option doesn't change anything, latter option fails). Thank you, - Andrew
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