--- php-7.4.24.orig/ext/standard/crc32.c	2021-09-21 13:23:20.000000000 +0200
+++ php-7.4.24/ext/standard/crc32.c	2021-09-29 10:27:37.144637295 +0200
@@ -23,7 +23,6 @@
 #if HAVE_AARCH64_CRC32
 # include <arm_acle.h>
 # if defined(__linux__)
-#  include <sys/auxv.h>
 #  include <asm/hwcap.h>
 # endif
 
@@ -32,13 +31,6 @@ static inline int has_crc32_insn() {
 	static int res = -1;
 	if (res != -1)
 		return res;
-# if defined(HWCAP_CRC32)
-	res = getauxval(AT_HWCAP) & HWCAP_CRC32;
-	return res;
-# elif defined(HWCAP2_CRC32)
-	res = getauxval(AT_HWCAP2) & HWCAP2_CRC32;
-	return res;
-# else
 	res = 0;
 	return res;
 # endif
@@ -85,13 +77,6 @@ PHP_NAMED_FUNCTION(php_if_crc32)
 
 	crc = crcinit^0xFFFFFFFF;
 
-#if HAVE_AARCH64_CRC32
-	if (has_crc32_insn()) {
-		crc = crc32_aarch64(crc, p, nr);
-		RETURN_LONG(crc^0xFFFFFFFF);
-	}
-#endif
-
 	for (; nr--; ++p) {
 		crc = ((crc >> 8) & 0x00FFFFFF) ^ crc32tab[(crc ^ (*p)) & 0xFF ];
 	}