[Bug sanitizer/85835] libsanitizer includes unconditionally

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85835

--- Comment #4 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu May 24 19:52:32 2018
New Revision: 260684

URL: https://gcc.gnu.org/viewcvs?rev=260684&root=gcc&view=rev
Log:
libsanitizer: Use pre-computed size of struct ustat for Linux

Cherry-pick compiler-rt revision 333213:

<sys/ustat.h> has been removed from glibc 2.28 by:

commit cf2478d53ad7071e84c724a986b56fe17f4f4ca7
Author: Adhemerval Zanella <adhemerval.zane...@linaro.org>
Date:   Sun Mar 18 11:28:59 2018 +0800

    Deprecate ustat syscall interface

This patch uses pre-computed size of struct ustat for Linux.

        PR sanitizer/85835
        * sanitizer_common/sanitizer_platform_limits_posix.cc: Don't
        include <sys/ustat.h> for Linux.
        (SIZEOF_STRUCT_USTAT): New.
        (struct_ustat_sz): Use SIZEOF_STRUCT_USTAT for Linux.

Modified:
    trunk/libsanitizer/ChangeLog
    trunk/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc