[Bug other/82590] New: auto-host.h error: declaration does not declare anything

[bastl at eclipso dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82590

            Bug ID: 82590
           Summary: auto-host.h error: declaration does not declare
                    anything
           Product: gcc
           Version: 7.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bastl at eclipso dot de
  Target Milestone: ---

Compiling GCC-7.2.0 with:

gcc (GCC) 6.3.0
libtool (GNU libtool) 2.4.6
GNU Make 4.2.1
GNU ld (GNU Binutils) 2.29
GNU Awk 4.1.4
perl 5, version 26, subversion 0 (v5.26.0)
bison (GNU Bison) 3.0.4
ldd (GNU libc) 2.26
GNU bash, version 4.4.12(2)-release

on and for:

i686-pc-linux-gnu

breaks with this error (./gcc):

checking for strings.h... yes
checking for inttypes.h... In file included from /usr/include/stdlib.h:707:0,
                 from /mnt/usb6/prog/7.91_gcc-7/gcc-7.2.0/./gcc/system.h:258,
                 from /mnt/usb6/prog/7.91_gcc-7/gcc-7.2.0/./gcc/genhooks.c:21:
/usr/include/bits/stdlib-bsearch.h: In function 'void* bsearch(const void*,
const void*, size_t, size_t, __compar_fn_t)':
/usr/include/bits/stdlib-bsearch.h:32:65: warning: cast from type 'const char*'
to type 'void*' casts away qualifiers [-Wcast-qual]
       __p = (void *) (((const char *) __base) + (__idx * __size));
                                                                 ^
/usr/include/bits/stdlib-bsearch.h:39:18: warning: cast from type 'const void*'
to type 'void*' casts away qualifiers [-Wcast-qual]
  return (void *) __p;
                  ^~~
In file included from /usr/include/bits/fcntl.h:61:0,
                 from /usr/include/fcntl.h:35,
                 from /mnt/usb6/prog/7.91_gcc-7/gcc-7.2.0/./gcc/system.h:349,
                 from /mnt/usb6/prog/7.91_gcc-7/gcc-7.2.0/./gcc/genhooks.c:21:
/usr/include/bits/fcntl-linux.h: At global scope:
/usr/include/bits/fcntl-linux.h:330:27: warning: ISO C++ forbids zero-size
array 'f_handle' [-Wpedantic]
   unsigned char f_handle[0];
                           ^
In file included from ./bconfig.h:3:0,
                 from /mnt/usb6/prog/7.91_gcc-7/gcc-7.2.0/./gcc/genhooks.c:20:
./auto-host.h:2357:16: error: declaration does not declare anything
[-fpermissive]
 #define rlim_t long
                ^
/usr/include/bits/resource.h:133:20: note: in expansion of macro 'rlim_t'
 typedef __rlim64_t rlim_t;