[Bug bootstrap/82651] New: After -r 253879 GCC 8.0 can't build cross compiler for mingw32

["mateuszb at poczta dot onet.pl" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82651

            Bug ID: 82651
           Summary: After -r 253879 GCC 8.0 can't build cross compiler for
                    mingw32
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mateuszb at poczta dot onet.pl
  Target Milestone: ---

-r 253878 works OK (for mingw32), -r 253879 breaks build cross compiler with
error:

g++ -fno-PIE -c   -pipe -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings
-fno-common  -DHAVE_CONFIG_H -I. -I. -I/home/ma/m/source/gcc-8/gcc
-I/home/ma/m/source/gcc-8/gcc/. -I/home/ma/m/source/gcc-8/gcc/../include
-I/home/ma/m/source/gcc-8/gcc/../libcpp/include
-I/home/ma/m/build/for_cross/include -I/home/ma/m/build/for_cross/include
-I/home/ma/m/build/for_cross/include 
-I/home/ma/m/source/gcc-8/gcc/../libdecnumber
-I/home/ma/m/source/gcc-8/gcc/../libdecnumber/bid -I../libdecnumber
-I/home/ma/m/source/gcc-8/gcc/../libbacktrace
-I/home/ma/m/build/for_cross/include  -o gimplify.o -MT gimplify.o -MMD -MP -MF
./.deps/gimplify.TPo /home/ma/m/source/gcc-8/gcc/gimplify.c
In file included from ./tm.h:20:0,
                 from /home/ma/m/source/gcc-8/gcc/backend.h:28,
                 from /home/ma/m/source/gcc-8/gcc/gimplify.c:26:
/home/ma/m/source/gcc-8/gcc/gimplify.c: In function ‘gimplify_status
gimplify_decl_expr(tree_node**, gimple**)’:
/home/ma/m/source/gcc-8/gcc/config/i386/i386.h:609:61: error: ‘ix86_cfun_abi’
was not declared in this scope
 #define TARGET_64BIT_MS_ABI (TARGET_64BIT && ix86_cfun_abi () == MS_ABI)
                                                             ^
/home/ma/m/source/gcc-8/gcc/config/i386/cygming.h:35:22: note: in expansion of
macro ‘TARGET_64BIT_MS_ABI’
 #define TARGET_SEH  (TARGET_64BIT_MS_ABI && flag_unwind_tables)
                      ^
/home/ma/m/source/gcc-8/gcc/config/i386/cygming.h:40:31: note: in expansion of
macro ‘TARGET_SEH’
 #define MAX_STACK_ALIGNMENT  (TARGET_SEH ? 128 : MAX_OFILE_ALIGNMENT)
                               ^
/home/ma/m/source/gcc-8/gcc/defaults.h:1142:39: note: in expansion of macro
‘MAX_STACK_ALIGNMENT’
 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
                                       ^
/home/ma/m/source/gcc-8/gcc/gimplify.c:1659:28: note: in expansion of macro
‘MAX_SUPPORTED_STACK_ALIGNMENT’
    && DECL_ALIGN (decl) <= MAX_SUPPORTED_STACK_ALIGNMENT
                            ^
/home/ma/m/source/gcc-8/gcc/gimplify.c: In function ‘gimplify_status
gimplify_target_expr(tree_node**, gimple**, gimple**)’:
/home/ma/m/source/gcc-8/gcc/config/i386/i386.h:609:61: error: ‘ix86_cfun_abi’
was not declared in this scope
 #define TARGET_64BIT_MS_ABI (TARGET_64BIT && ix86_cfun_abi () == MS_ABI)
                                                             ^
/home/ma/m/source/gcc-8/gcc/config/i386/cygming.h:35:22: note: in expansion of
macro ‘TARGET_64BIT_MS_ABI’
 #define TARGET_SEH  (TARGET_64BIT_MS_ABI && flag_unwind_tables)
                      ^
/home/ma/m/source/gcc-8/gcc/config/i386/cygming.h:40:31: note: in expansion of
macro ‘TARGET_SEH’
 #define MAX_STACK_ALIGNMENT  (TARGET_SEH ? 128 : MAX_OFILE_ALIGNMENT)
                               ^
/home/ma/m/source/gcc-8/gcc/defaults.h:1142:39: note: in expansion of macro
‘MAX_STACK_ALIGNMENT’
 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
                                       ^
/home/ma/m/source/gcc-8/gcc/gimplify.c:6510:32: note: in expansion of macro
‘MAX_SUPPORTED_STACK_ALIGNMENT’
        && DECL_ALIGN (temp) <= MAX_SUPPORTED_STACK_ALIGNMENT
                                ^
Makefile:1104: recipe for target 'gimplify.o' failed
make[1]: *** [gimplify.o] Error 1
make[1]: Leaving directory '/home/ma/m/build/bc_gcc/gcc'
Makefile:4285: recipe for target 'all-gcc' failed
make: *** [all-gcc] Error 2