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dlmalloc.c: Fix gcc alias warning

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Fix these warnings:
dlmalloc.c: In function 'free':
dlmalloc.c:2507: warning: dereferencing pointer '({anonymous})' does break strict-aliasing rules
dlmalloc.c:2507: warning: dereferencing pointer '({anonymous})' does break strict-aliasing rules
dlmalloc.c:2507: warning: dereferencing pointer '({anonymous})' does break strict-aliasing rules

Some page(http://blog.worldofcoding.com/2010/02/solving-gcc-44-strict-aliasing-problems.html)
suggests adding __attribute__((__may_alias__)). Doing so makes the warnings go away.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Acked-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Joakim Tjernlund 2010-10-14 08:51:34 +02:00 • committed by Wolfgang Denk
parent d1e0b10acc
commit 1ba91ba233
1 changed files with 1 additions and 1 deletions
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2
common/dlmalloc.c
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@ -1152,7 +1152,7 @@ struct malloc_chunk
INTERNAL_SIZE_T size; /* Size in bytes, including overhead. */
struct malloc_chunk* fd; /* double links -- used only if free. */
struct malloc_chunk* bk;
};
} __attribute__((__may_alias__)) ;
typedef struct malloc_chunk* mchunkptr;