when trying to compile selective_scan I get the error "VMamba-main\kernels\selective_scan\csrc\selective_scan\cus\selective_scan_bwd_kernel.cuh(158): error: identifier "M_LOG2E" is undefined"

[Roaryie]

is there a fix for it or how do I get it to work

[MzeroMiko]

So can you show me the environment you use?

[WqxLoveCoding]

Have you fixed it? I met the same error...

[MzeroMiko]

M_LOG2E is actually math_log_2{e}, which is approximately 1.4426950408889634. You can #define M_LOG2E 1.4426950408889634; to use it.