Hi, When building perf for RISCV 32 bit (v5.10.7) I got the following
| In file included from bench/futex-hash.c:29: | bench/futex.h: In function ‘futex_wait’: | bench/futex.h:37:10: error: ‘SYS_futex’ undeclared (first use in this function); did you mean ‘SYS_tee’? This issue is similar to the one reported in https://lkml.org/lkml/2019/4/19/631 I found that patching tools/arch/riscv/include/uapi/asm/unistd.h as following: #ifdef __LP64__ #define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_SET_GET_RLIMIT +#else +#define __ARCH_WANT_TIME32_SYSCALLS #endif /* __LP64__ */ solved the problem. I also found that a similar patch for arch/riscv/include/uapi/asm/unistd.h was removed in commit d4c08b9776b3, so probably this is not the right way(?). Thank you, best regards.