https://github.com/vasi/pixz/pull/82

From 8b9a198d86e435929ed0c2246217d241ed1e707c Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Sun, 1 Sep 2019 23:58:26 -0700
Subject: [PATCH] Avoid unaligned accesses

Architectures like SPARC do not allow unaligned accesses. Avoid them by
memcpy()ing the data to an aligned buffer. On x86 systems where
unaligned loads are fast, the memcpy() will be compiled away and the
same code generated as before.
---
 src/endian.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/endian.c b/src/endian.c
index 51aea58..122c7da 100644
--- a/src/endian.c
+++ b/src/endian.c
@@ -13,6 +13,7 @@ void xle64enc(uint8_t *d, uint64_t n) {
 #elif defined(__linux__) || defined(__FreeBSD__)
 
 #include <stdint.h>
+#include <string.h>
 #ifdef __linux__
 	#include <endian.h>
 	#include <byteswap.h>
@@ -37,11 +38,14 @@ void xle64enc(uint8_t *d, uint64_t n) {
 #endif
 
 uint64_t xle64dec(const uint8_t *d) {
-    return le64toh(*(uint64_t*)d);
+    uint64_t tmp;
+    memcpy(&tmp, d, sizeof(tmp));
+    return le64toh(tmp);
 }
 
 void xle64enc(uint8_t *d, uint64_t n) {
-    *(uint64_t*)d = htole64(n);
+    uint64_t tmp = htole64(n);
+    memcpy(d, &tmp, sizeof(tmp));
 }
 
 #else