mingw compilation of base broken

[Riccardo Mottola]

Hi,

while compiling I get:

 Compiling file NSNumberFormatter.m ...
 Compiling file NSObjCRuntime.m ...
 Compiling file NSObject.m ...
NSObject.m:422: warning: implicit declaration of function 
`__builtin_offsetof'
NSObject.m:422: error: syntax error before "struct"
NSObject.m:422: warning: no semicolon at end of struct or union
NSObject.m:422: error: syntax error before '}' token
NSObject.m:422: error: syntax error before '}' token
NSObject.m:422: error: syntax error before '}' token
NSObject.m:422: error: syntax error before '}' token
NSObject.m:424: error: syntax error before '}' token
NSObject.m: In function `NSDecrementExtraRefCountWasZero':
NSObject.m:474: error: invalid use of undefined type `struct obj_layout'
NSObject.m:474: error: dereferencing pointer to incomplete type
NSObject.m:489: error: invalid use of undefined type `struct obj_layout'
NSObject.m:489: error: dereferencing pointer to incomplete type
NSObject.m:511: error: invalid use of undefined type `struct obj_layout'
NSObject.m:511: error: dereferencing pointer to incomplete type
NSObject.m:517: error: invalid use of undefined type `struct obj_layout'
NSObject.m:517: error: dereferencing pointer to incomplete type
NSObject.m: In function `NSExtraRefCount':
NSObject.m:542: error: invalid use of undefined type `struct obj_layout'
NSObject.m:542: error: dereferencing pointer to incomplete type
NSObject.m: In function `NSIncrementExtraRefCount':
NSObject.m:585: error: invalid use of undefined type `struct obj_layout'
NSObject.m:585: error: dereferencing pointer to incomplete type
NSObject.m:607: error: invalid use of undefined type `struct obj_layout'
NSObject.m:607: error: dereferencing pointer to incomplete type
NSObject.m:612: error: invalid use of undefined type `struct obj_layout'
NSObject.m:612: error: dereferencing pointer to incomplete type
NSObject.m: In function `NSAllocateObject':
NSObject.m:810: error: invalid application of `sizeof' to incomplete 
type `obj_layout'
NSObject.m:819: error: invalid use of undefined type `struct obj_layout'
NSObject.m:819: error: dereferencing pointer to incomplete type
NSObject.m: In function `NSDeallocateObject':
NSObject.m:860: error: invalid use of undefined type `struct obj_layout'
NSObject.m:860: error: dereferencing pointer to incomplete type
make[4]: *** [obj/libgnustep-base.obj/NSObject.m.o] Error 1
make[3]: *** [internal-library-all_] Error 2

Ideas? Anybody else experiencing something similar.

This is not latest mingw, but it used to compile routinely up to about 2 
weeks ago.

Riccardo