glibc does not define SYS_futex for 32bit architectures using 64bit time_t e.g. riscv32, therefore perf fails to compile as it does not find SYS_futex in C library headers, define it to SYS_futex_time64 when it exists
Upstream-Status: Pending Signed-off-by: Khem Raj <raj.k...@gmail.com> --- tools/perf/bench/futex.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h index 31b53cc7d5bc..33f3f3230ae1 100644 --- a/tools/perf/bench/futex.h +++ b/tools/perf/bench/futex.h @@ -13,6 +13,19 @@ #include <sys/types.h> #include <linux/futex.h> +/** + * SYS_futex is expected from system C library, + * in glibc (/usr/include/bits/syscall.h defines it in terms of of NR_futex) + * some newer 32bit architectures e.g. RISCV32 is using 64bit time_t from + * get go unlike other 32bit architectures in glibc, therefore it wont have + * NR_futex defined but just NR_futex_time64 this aliases it to NR_futex + * so that SYS_futex is then defined for rv32 +*/ + +#if !defined(SYS_futex) && defined(SYS_futex_time64) +#define SYS_futex SYS_futex_time64 +#endif + /** * futex() - SYS_futex syscall wrapper * @uaddr: address of first futex -- 2.29.2
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