From 67b0e435f36a51b256d72490bc569fcce00913df Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Fri, 4 Jun 2021 19:29:27 +0100
Subject: [PATCH] crc32 feature detection from auxiliary vectors on FreeBSD

---
 ext/standard/crc32.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ext/standard/crc32.c b/ext/standard/crc32.c
index a41eb560a73..293fab43bbc 100644
--- a/ext/standard/crc32.c
+++ b/ext/standard/crc32.c
@@ -26,6 +26,15 @@
 #  include <asm/hwcap.h>
 # elif defined(__APPLE__)
 #  include <sys/sysctl.h>
+# elif defined(__FreeBSD__)
+#  include <sys/auxv.h>
+
+static unsigned long getauxval(unsigned long key) {
+	unsigned long ret = 0;
+	if (elf_aux_info(key, &ret, sizeof(ret)) != 0)
+		return 0;
+	return ret;
+}
 # endif
 
 static inline int has_crc32_insn() {