more patches

common/optional/x86-64-v3/patches/zopfli/unaligned-match-loads.patch

@@ -0,0 +1,32 @@
+Subject: [PATCH] Read unaligned match buffers with memcpy
+
+Byte buffers need not satisfy integer alignment or aliasing requirements.
+GCC 16 with x86-64-v3 vectorizes the cast loads using aligned AVX reads,
+causing a segmentation fault. Copy into local integers instead.
+
+--- a/src/zopfli/lz77.c
++++ b/src/zopfli/lz77.c
+@@ -302,13 +302,20 @@
+   if (sizeof(size_t) == 8) {
+     /* 8 checks at once per array bounds check (size_t is 64-bit). */
+-    while (scan < safe_end && *((size_t*)scan) == *((size_t*)match)) {
++    while (scan < safe_end) {
++      size_t scan_word, match_word;
++      memcpy(&scan_word, scan, sizeof(scan_word));
++      memcpy(&match_word, match, sizeof(match_word));
++      if (scan_word != match_word) break;
+       scan += 8;
+       match += 8;
+     }
+   } else if (sizeof(unsigned int) == 4) {
+     /* 4 checks at once per array bounds check (unsigned int is 32-bit). */
+-    while (scan < safe_end
+-        && *((unsigned int*)scan) == *((unsigned int*)match)) {
++    while (scan < safe_end) {
++      unsigned int scan_word, match_word;
++      memcpy(&scan_word, scan, sizeof(scan_word));
++      memcpy(&match_word, match, sizeof(match_word));
++      if (scan_word != match_word) break;
+       scan += 4;
+       match += 4;
+     }