@@ -985,6 +985,7 @@ HAVE_LIST="

     alsa_asoundlib_h

     altivec_h

     arpa_inet_h

+    attribute_may_alias

     attribute_packed

     bswap

     closesocket

@@ -2298,6 +2299,10 @@ check_cc <<EOF && enable attribute_packed

 struct { int x; } __attribute__((packed)) x;

 EOF

+check_cc <<EOF && enable attribute_may_alias

+union { int x; } __attribute__((may_alias)) x;

+EOF

+

 check_cc <<EOF || die "endian test failed"

 unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';

 EOF