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Bug#571532: #570889 ant: FTBFS on kfreebsd-* and hppa: Bus error

Now it looks like wider problem - #571532, #571542, #571397.

Does ant actually try to mmap stdin? That's a bug in ant.

POSIX says you may only mmap a file, shared memory object,
or typed memory object. The stdin file descriptor is neither
of those things therefore you can't mmap stdin.

No, no, no. Not in my example:
  gcc tst.c -o tst
  tst < tst.c

My point is a different one, see in #570889.

14997 gij-4.4  CALL  open(0x8e59e58,O_RDONLY|O_LARGEFILE,<unused>0)
14997 gij-4.4  NAMI ".../defaults.properties"
14997 gij-4.4  RET   open 10/0xa
14997 gij-4.4  CALL  fstat(0xa,0xbfbf29ec)
14997 gij-4.4  STRU  size=1701
14997 gij-4.4  RET   fstat 0
14997 gij-4.4  CALL  mmap(0,0x2000,PROT_READ,MAP_PRIVATE,0xa,0,0)
14997 gij-4.4  RET   mmap 712716288/0x2a7b3000
14997 gij-4.4  PSIG  SIGBUS SIG_DFL

The ant/gij-4.4 mmaps 8192 bytes from file of size 1701
on architecture with pagesize 4096.

It is at least weird, possible consequences are demonstrated
by my tst.c example.


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