From dae21d3808be93c30fda318b19657b4db6ad2b5d Mon Sep 17 00:00:00 2001 From: Dave Rodgman Date: Tue, 30 Jan 2024 15:31:42 +0000 Subject: [PATCH] Support SHA-512 hwcap detection on old libc Signed-off-by: Dave Rodgman --- library/sha512.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/library/sha512.c b/library/sha512.c index 601125445..6dcea8da5 100644 --- a/library/sha512.c +++ b/library/sha512.c @@ -102,6 +102,14 @@ # if defined(__linux__) /* Our preferred method of detection is getauxval() */ # include +# if !defined(HWCAP_SHA512) +/* The same header that declares getauxval() should provide the HWCAP_xxx + * constants to analyze its return value. However, the libc may be too + * old to have the constant that we need. So if it's missing, assume that + * the value is the same one used by the Linux kernel ABI. + */ +# define HWCAP_SHA512 (1 << 21) +# endif # endif /* Use SIGILL on Unix, and fall back to it on Linux */ # include