[git commit] Hopefully fix "will break strict-aliasing rules" warning for get_le32

Denys Vlasenko vda.linux at googlemail.com
Thu Aug 10 10:40:48 UTC 2017


commit: https://git.busybox.net/busybox/commit/?id=bac929b99b4a9ca0fd16d696175692b6545907c5
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 include/platform.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/platform.h b/include/platform.h
index b81c59d..c365d5c 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -260,6 +260,11 @@ typedef uint64_t bb__aliased_uint64_t FIX_ALIASING;
 #define put_unaligned_le32(val, buf) move_to_unaligned32(buf, SWAP_LE32(val))
 #define put_unaligned_be32(val, buf) move_to_unaligned32(buf, SWAP_BE32(val))
 
+/* unxz needs an aligned fixed-endian accessor.
+ * (however, the compiler does not realize it's aligned, the cast is still necessary)
+ */
+#define get_le32(u32p) ({ uint32_t v = *(bb__aliased_uint32_t*)(u32p); SWAP_LE32(v); })
+
 
 /* ---- Size-saving "small" ints (arch-dependent) ----------- */
 


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