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Check for __attribute__((packed)) support

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Not all compilers claiming to be gcc support this attribute.

Originally committed as revision 19453 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-07-17 08:21:43 +00:00
parent df5cdc24b9
commit e7ea5e3d8d
2 changed files with 6 additions and 1 deletions
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5
configure vendored
View File

@ -899,6 +899,7 @@ HAVE_LIST="
alsa_asoundlib_h
altivec_h
arpa_inet_h
attribute_packed
bigendian
bswap
closesocket
@ -2165,6 +2166,10 @@ void foo(char * $restrict_keyword p);
EOF
done
check_cc <<EOF && enable attribute_packed
struct { int x; } __attribute__((packed)) x;
EOF
##########################################
# SDL check

2
libavutil/intreadwrite.h
View File

@ -42,7 +42,7 @@
* by per-arch headers.
*/
#if defined(__GNUC__)
#if HAVE_ATTRIBUTE_PACKED
struct unaligned_64 { uint64_t l; } __attribute__((packed));
struct unaligned_32 { uint32_t l; } __attribute__((packed));